JeVois Tech Zone - Recent questions

How to solve this Error: ModuleNotFoundError: No module named 'torch._C'

Sat, 14 Aug 2021 09:50:30 +0000

Hello. I have the following problem:

In my Python Software I use : from detecto import core, utils, visualize

After this I imediately receive this error:

ERR Log::warnAndIgnoreException: Caught exception from the Python interpreter:

ERR Log::warnAndIgnoreException: Python traceback (most recent calls last):

ERR Log::warnAndIgnoreException: File /jevois/modules/Dambrowsky/PythonTest/PythonTest.py

ERR Log::warnAndIgnoreException: Line 166, in process:

ERR Log::warnAndIgnoreException: File /usr/lib/python3.7/site-packages/detecto/core.py

ERR Log::warnAndIgnoreException: Line 4, in <module>:

ERR Log::warnAndIgnoreException: File /usr/lib/python3.7/site-packages/torch/__init__.py

ERR Log::warnAndIgnoreException: Line 79, in <module>:

ERR Log::warnAndIgnoreException: ModuleNotFoundError: No module named 'torch._C'

I have installed the following Libraries:

hell pip list

Package Version

--------------------- ---------------

arrow 0.10.0

asn1crypto 0.24.0

async-timeout 3.0.1

attrs 18.2.0

backcall 0.1.0

beautifulsoup4 4.5.3

bitstring 3.1.5

cached-property 1.4.0

cbor 1.0.0

certifi 2018.11.29

cffi 1.11.2

characteristic 14.3.0

chardet 3.0.4

constantly 15.1.0

cryptography 2.3.1

cycler 0.10.0

daemonize 2.4.7

DataProperty 0.29.1

decorator 4.0.11

detecto 1.2.1

humanize 0.5.1

idna 2.8

iowait 0.2

ipython-genutils 0.2.0

json-schema-validator 2.4.1

jsonmodels 2.4

jsonschema 2.5.1

kiwisolver 1.3.1

Logbook 1.4.3

lxml 4.3.3

markdown2 2.3.6

matplotlib 3.4.2

mbstrdecoder 0.2.2

more-itertools 4.0.1

msgpack 0.6.1

multidict 4.5.2

numpy 1.16.3

pandas 1.1.0

path.py 10.5

pathtools 0.1.2

pathvalidate 0.16.0

pexpect 4.6.0

pickleshare 0.7.4

Pillow 8.3.0

pip 19.1

ply 3.11

posix-ipc 1.0.4

protobuf 3.6.0

psutil 5.6.2

ptyprocess 0.5.1

py 1.8.0

py-ubjson 0.12.0

pycparser 2.19

pycrypto 2.6.1

pyinotify 0.9.6

pylibdmtx 0.1.9

pylru 1.0.9

pyparsing 3.0.0b2

pytablereader 0.15.0

python-dateutil 2.8.0

PyTrie 0.3.1

pytz 2018.9

PyYAML 4.2b4

requests 2.21.0

scandir 1.9.0

schedule 0.6.0

scipy 1.3.0

see 1.4.1

semver 2.8.1

setuptools 41.0.1

sh 1.12.14

simplegeneric 0.8.1

simplejson 3.11.1

SimpleSQLite 0.15.0

six 1.12.0

sortedcontainers 2.1.0

tabledata 0.0.5

tempora 1.7

torch 1.1.0

torchvision 0.3.0a0+bbd363c

tqdm 4.61.2

traitlets 4.3.2

typepy 0.0.20

ujson 1.35

urllib3 1.24.2

uvloop 0.12.2

validators 0.12.2

visitor 0.1.3

Whoosh 2.7.4

xlrd 1.0.0

It looks like the Library torch._C is not available. Is there anybody who can help me?

Thank you very much.

Peter Dambrowsky

How to uninstall a Library from the Linux partition of the microSD

Tue, 10 Aug 2021 07:26:15 +0000

When I have installed a Library with the Inventor using a .whl file (it is functioning only with the inventor under Ubuntu) and I want do delete it later, how do I have to do it. Is there a special shell command? I tried to do it directly under usr/lib/python3.7/site-packages on the microSD Linux partition. But here I could see, that I have not the rights to delete something.

An answer would realy help me.

Best regards

Peter

What are the units of the absolute exposure "absexp" setting for the camera?

Fri, 23 Oct 2020 21:18:44 +0000

Is absolute exposure (absexp) in units of uS (microseconds) or 100uS? I see some cameras use 100uS but I can't confirm if this is true for JeVois.

absexp can be set from 1 to 1259 in JeVois Inventor. I looked at the datasheet for the camera sensor (ov7725 in my case) but I can't relate this back to any numbers I see there such as "Electronic Exposure Up To 510:1". Thanks!

For DemoArUco, how do you measure marker size?

Tue, 29 Sep 2020 01:22:21 +0000

I'm assuming it includes the outside black border but I'm not sure yet. Thanks

Strange Arduino pins in the visually-guided toy robot tutorial

Tue, 15 Sep 2020 21:21:18 +0000

Not sure if this comment should come here...

I am trying to build the visually-guided robot according to the tutorial

http://jevois.org/tutorials/UserRobotCar.html

I noticed that the tutorial uses Arduino pins 20 and 21 to connect to IN1/IN2 of right and left motors on the motor driver.

However pins 20 and 21 are the TX and RX pins on the pro micro arduino board used.

As the TX/RX pins are of course used to receive serial information from the jevois camera, they cannot be used to drive the motors.

I guess that any digital pins can be used instead, but this should preferably be modified in the tutorial.

Jevois-inventor does not load camera, 1.15 firmware, Latest Ubuntu 20 Virtualbox with 1.15

Mon, 14 Sep 2020 21:16:24 +0000

Hi, I'm having trouble getting jevois-inventor 1.00 to load on the latest Ubuntu V20 .vdi with JeVois 1.15.0 package (from a few days ago). I was able to compile all the JeVois packages (base package, etc for host and platform). when I run JeVois-inventor, with or without sudo, the camera doesn't load. guvcview works and the camera is connected to Linux. /dev/ttyACM0 is also created and I can communicate. But the program doesn't load up. I loaded the flash card on the JeVois with the latest 1.15.0 disk image. jevois-inventor 1.0 works on mac completely with the latest 1.15.0 disk image on the JeVois device. However when I attach the camera to Linux, the individual camera and USB to serial port work, but the inventor program is stuck "waiting for JeVois Smart Camera" even though it says Connected / video0 / ttyACM0 on the right. When I unplug and reconnect again, I see Connected / video0 / ttyACM0 again, and when I unplug it says "disconnected". However running guvcview loads up the camera. I can also picocom to ttyACM0. On the Mac side, I get the same error initially, however after unplugging and replugging inventor loads up with status "JeVois Inventor 1.0.0 with camera running JeVois 1.15.0. Reconnecting the camera back on the inventor side, I get the message JeVois Inventor 1.0.0 waiting for JeVois Smart Camera again on the bottom left, and it says Connected / video0 /ttyACM0 on the bottom right side of the inventor window. I have USB3 mode selected in VirtualBox. Thoughts?

The following is the output of dimes when camera connected using VirtualBox.

[ 3656.645672] usb 1-2: new high-speed USB device number 12 using xhci_hcd
[ 3656.795505] usb 1-2: New USB device found, idVendor=1d6b, idProduct=0102, bcdDevice= 1.00
[ 3656.795507] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3656.795508] usb 1-2: Product: JeVois-A33 Smart Camera
[ 3656.795509] usb 1-2: Manufacturer: JeVois Inc
[ 3656.802792] uvcvideo: Found UVC 1.00 device JeVois-A33 Smart Camera (1d6b:0102)
[ 3656.806671] uvcvideo 1-2:1.0: Entity type for entity Processing 2 was not initialized!
[ 3656.806672] uvcvideo 1-2:1.0: Entity type for entity Camera 1 was not initialized!
[ 3656.806784] input: JeVois-A33 Smart Camera: JeVois as /devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/input/input16
[ 3656.807378] cdc_acm 1-2:1.2: ttyACM0: USB ACM device
[ 3656.808084] usb-storage 1-2:1.4: USB Mass Storage device detected
[ 3656.808215] scsi host3: usb-storage 1-2:1.4
[ 3657.827246] scsi 3:0:0:0: Direct-Access JeVois Smart Camera 0333 PQ: 0 ANSI: 2
[ 3657.829044] sd 3:0:0:0: Attached scsi generic sg2 type 0
[ 3657.830999] sd 3:0:0:0: Power-on or device reset occurred
[ 3657.832969] sd 3:0:0:0: [sdb] Attached SCSI removable disk

Best,

Josh

How can I determine whether active cooling is necessary for my application?

Mon, 07 Sep 2020 08:14:08 +0000

I would like to avoid active cooling for my application, but I'm not sure how to test this short of clipping the fan wires as described here: http://jevois.org/doc/Fanless.html From what I understand, there's no alternative way to disable the fan, is this correct?

My application involves pose estimation using ArUco markers at around 320x240 resolution, aiming for 30 FPS or better with the global shutter camera and potentially up to 20 markers visible at a time. Is it possible to make an educated guess based on this use case?

Alternatively, is it possible to make an educated guess based on the CPU usage?

please moderate this message so I can post.

Thu, 27 Aug 2020 23:32:59 +0000

third attempt. Thanks!

This is orion parrott (username op). Eager to stop bugging Monsieur Laurent Itti personally each time I need help. But I remain unable to post to forum after several attempts. Thanks for your help!

How to create an own MobileNetSSD caffe model

Mon, 27 Jul 2020 08:47:34 +0000

Good morning, Ladies and Gentlemen,

I have a problem and perhaps you can help me. I am building a Robot. Unitl now he can move, listen, speaking in English, German and Spanish. Also he can look with your JeVois cam. Therefor I use 3 Arduino Mega 2560.
The first on is the masterbrain (for hearing, moving, speaking and to tell the Subbrains, what they has to do).
The second one is an Subbrain (for moving the robot and to measure the distances to the front, to the sides and to behind. Also he can measure downward to recognize stairs). Sending back results to the Masterbrain.
The third one is also a Subbrain(for moving an Arm with 6 Servos, listen for noise and turn the Arm in this direction, looking for Objects (with your cam). The cam can detect up to 20 Objects. If the cam detect a Person, she will looking for a face. If she see a face, she will look, wether she recognize this face. Sending back results to the Masterbrain.

Therefor I am using

MobileNetSSD_deploy.caffemodel

MobileNetSSD_deploy.prototxt

darknet yolo data voc.names (with 20 pretrained objects)

All is functioning very well. My problem is, that I want to train some
more other objects (for example 10 new objects more) to this model with a Python
program and I do not know, how I have to do it. How can I train my own caffe model? Can you help me? Do you
have an explanation or a sample program for this? I want to understand, what I have to do to train my own caffe model. I want to integrate this in my existing software of my homebulid robot. In this case my robot can learn new objects every time by himself. That is what I understand under begining artificial Inteligence.

Please give me an answer as soon as possible.

I wish you a good and healthy future

Best regards

Peter Dambrowsky

By now, is it possible to read IMU raw data using python?

Mon, 29 Jun 2020 07:58:44 +0000

Problem when installing customized module to jevois

Mon, 15 Jun 2020 12:48:10 +0000

When running the script rebuild-platform.sh, the jevois is mounted as a disk to /media/${user}/JEVOIS. In fact, the jevois-usbsd does not run that fast to mount the jevois. The cmake will create a directory (/media/${user}/JEVOIS) on the host computer, copy the cross-compiled library to the fake path.Subsequently, the jevois is mounted to /media/${user}/JEVOIS1. Thereby, the installation fails. My current solution for this is to execute the jevois-usbsd before running rebuild-platform.sh. It is better to get a better solution for this.

support for data matrix / small 2D barcode

Thu, 14 May 2020 20:29:47 +0000

hi jevois team;

someone came to me for decoding small 2D barcode, turns out that the best format is data_matrix (dtmx). So i though again about our poor attempts to get libdtmx on JeVois. We already discussed this in late 2018 here and there.

We simply couldn't make the suggested tutorial http://jevois.org/tutorials/ProgrammerDlib.html

Looking at the barcode documentation, I still do not see the data_matrix format.

it's a pitty, i'm sure the right person could get that solved in no time :'(

Can anyone help me ?

camera fails to connect to mac inventor

Sat, 09 May 2020 22:12:43 +0000

I have two new JeVois cameras and I cannot get either one of them to connect to my MacBook Pro workstation with Inventor. I have the latest SD flashed and have the camera connected to separate power with more than enough power. The camera boots up and the indicator light is green and then turns orange. I am using a JeVois Y cable with USB B for the power and micro USB plugged into a micro USB to USB B adapter to connect with the Mac. Inventor is up and running when I plug in the camera to the Mac, waiting for a connection. But the camera never connects. Photobooth and StreamLabs OBS both do not see a second camera other than the laptop built in camera. What other troubleshooting can I do?

Not able to install developer software the quick way as given in jevois.usc.edu

Sat, 09 May 2020 06:44:18 +0000

I receive the error: The repository 'https://jevois.usc.edu/apt bionic Release' does not have a Release file.

even after adding the deb package in sources.list.d, upon doing "apt update" it says

Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 68.181.32.21 443]

I am not able to add jevois repository and install jevois on ubuntu 18.04

Fri, 08 May 2020 07:39:59 +0000

Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 68.181.32.21 443]
Reading package lists... Done
E: The repository 'https://jevois.usc.edu/apt bionic Release' does not have a Release file.

Using tensorflow in python

Thu, 23 Apr 2020 16:19:42 +0000

Hello,

I followed the Jevois tutorial to train imagenet on new classifiers, and generated the tflite file, but I was wondering now if it is possible to use this model in a python module. The tutorial explains how to deploy the tflite model to the tensorfloweasy module, but I would prefer to do this from within a python module. I tried to import tensorflow in a python module, but tensorflow was not found. I also tried to install a few different wheels for tensorflow on the camera, but this just caused the camera to crash. Overall, I am just wondering if it is possible to use the tensorflow library in a python module, rather than a C++ module like tensorfloweasy

Possible software error in the JeVois cam A33

Sat, 11 Apr 2020 08:38:19 +0000

Hello,

What I want to do is to set Date and Time from the hard serial connected Arduino Mega to the cam. I try to do it with this Arduino software:

:#define JeVois Serial2

  JeVois.begin(115200);     //Verbindung mit JeVois-Kamera
  JeVois.setTimeout(1000000);

  JeVois.println("date " + DatumZeit); In the variable DatumZeit i have the actual date and time. So the string I am sending is "date 0411123020" it means "date MMDDhhmmYY" M = Month, D = Day, h = hour, m = minute and YY = the last 2 digits of the year.

And now the A33 software mistake: normaly after power on the Date and Time is always 01.01.1970 00:00:00. in this case it is impossible to send the new Date and Time to the cam. The problem is the year 1970. If you change the year with the manual date command in the inventor, the cam will accept the date and time from the Arduino. I fyou change the year back to 1970, it will not function anymore. So it is not possible to send the real date and time to the cam after a short power off.

I tried several things to see what happens but the mistake is, that the cam a33 will not accept a date and time string, if the year in the cam is 1970.

What can I do or what can you do?

Best regards

Peter Dambrowsky

Headless jevois : frame to Serial

Fri, 10 Apr 2020 08:25:15 +0000

Hi,

I am confused as i try to make my A33 JeVois camera to base64 encode a single frame then send this base64 string to nodeMCU thru serial.

I made this python module :

import libjevois as jevois
import cv2
import base64

class img2serial2web:
def __init__(self):
self.frame = 0
self.image_requested = True

def processNoUSB(self, inframe):
img = inframe.getCvBGR()

if self.image_requested:
retval, cnt = cv2.imencode('.jpg',img)
bcnt = base64.b64encode(cnt)
jevois.sendSerial(bcnt)
self.image_requested = False

If i try this code with jevois-daemon (replacing processNoUSB(self, inframe) by process(self, inframe, outframe)) the module works great and print the base64 in my terminal.

But when i import it to th camera and run it using serial commands i have no output at all, except the default jevois log (INF Engine::setFormatInternal: Module [img2serial] loaded, initialized, and ready).

I really don't know what am i doig wrong.

My goal is to make my nodemcu get a single frame from jevois as a base64 encoded string and then send this string to a php webpage. Any suggestion ?

Using tensorflow within a python module

Tue, 07 Apr 2020 19:29:18 +0000

Hello,

I am making a new python module in the camera, and want to use certain tensorflow functions. I tried importing tensorflow at the top of the python module, but it gives me an error that says "No module named 'tensorflow' ". I saw that there are a couple tensorflow modules on the camera already, but they are programmed in C++. Basically, I'm just wondering if it's possible to use tensorflow from within a python module on this camera.

Actual FOV of standard lens

Sat, 04 Apr 2020 22:54:42 +0000

I have an A33 Jevois camera with standard lens. I'm trying to use this camera for mapping/SLAM purposes, so I need to get FOV relatively accurately. Checking online, there appears to be conflicting specs on this, where the FOV is stated as either 60^o or 65^o (here http://jevois.org/doc/Lenses.html and here https://www.jevoisinc.com/pages/hardware).

I decided to take the camera to the Vicon motion capture room to see if I could validate either of these figures.

I calculated the FOV by determining the horizontal length a known object was in the camera image, then knowing exactly how far away the camera was from that object, I could calculate the FOV. The figure I kept realising was just shy of 51^o (well short of the 60^o - 65^o).

Have you guys done any testing to determine the effective FOV of this device?

How to get Serial data from jevois to NodeMCU ?

Fri, 03 Apr 2020 09:01:41 +0000

Hello everyone,

I am trying to use this simple c code to get infos from the jevois camera to be printed on my computer ArduinoIDE Serial monitor thru a NodeMCU Lolin V3 :

#include<SoftwareSerial.h>
SoftwareSerial txrx(D5,D6);

void setup() {
Serial.begin(115200);
txrx.begin(115200);
}

void loop() {
txrx.write("info");
while (txrx.available() > 0) {
Serial.print((char)txrx.read());
}
}

My serial monitor (on computer) is set to 115200 Bauds and the 4Pins serial from jevois is wired to the NodeMCU this way :

Jevois RED --------> nodemcu Vin

Jevois BLACK ----> nodemcu Ground

Jevois YELLOW -> nodemcu D6

jevois WHITE -----> nodemcu D5

I have weird behaviors during my tests.

The NodeMCU seems not to send commands correctly, and i can't get proper datas from jevois.

Sometimes i receives stuff bus it's mosly garbage chars.

What am i doing wrong ?

what is the best way to locate a red laser pointer spot using jevois ?

Mon, 09 Mar 2020 13:07:18 +0000

I am trying to detect a red laser pointer spot in order to use it for an arm picking an object . What is the best way to detect the location of the spot in in the camera window ? The laser dot is strong so the luminosity of the spot is high. Tried with Object Tracker but cannot find a suitable range of HSV able to reliably locate it. Is there any recommended way to do this ?

Thank you,

Does the jevois-inventor provides the feature to flash the current time off host computer

Fri, 06 Mar 2020 17:09:45 +0000

Hello, I am looking for a python program to take the date and time from the host computer and send it to the Jevois A33 cam ( like I can do it in the console with the comand "date 2020.03.06-15:30:00".

I want to do this with a program line in Python on ervery start of the Cam.

Please help me.

Regards

Peter

how to detect a laser pointer spot (650 nm) using jevois ?

Thu, 05 Mar 2020 11:00:36 +0000

I need to track a laser pointer spot on different backgrounds. Tried with object tracker in HSV but no setting seems to give reliable results. Is there a different way to that ?

I am trying cause my Arduino UNO to trigger the recording of Video through the Save Video Module in Jevois.

Thu, 05 Mar 2020 00:37:16 +0000

I am trying cause my Arduino UNO to trigger the recording of Video through the Save Video Module in Jevois and save it on the SD card in the Camera. I want to trigger the start of recording and the end of recording using a button that I press on my Arduino UNO. Copied below is the code I am using. It is displaying the message in the Arduino Serial Monitor but it is not triggering the camera to begin recording or stop recording.

#define rxPin 0
#define txPin 1
#define ledPin 13

int led = 13;
int button = 12;

int ledState = LOW;
int buttonCurrent;
int buttonPrevious = HIGH;

byte pinState = 0;
String SetUp = "setpar serout setmapping2 YUYV 640 480 30.0 JeVois SaveVideo";
String StreamOn = "setpar serout streamon";
String Start = "setpar serout start";
String Stop = "setpar serout stop";
String StreamOff = "setpar serout streamoff";

void setup()
{
  Serial.begin(115200);
  pinMode(button, INPUT);
  pinMode(led, OUTPUT);

  // define pin modes for tx, rx, led pins:
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  // set the data rate for the SoftwareSerial port

  Serial.println(SetUp);
}

void loop()
{
  buttonCurrent = digitalRead(button);

  if (buttonCurrent == HIGH && buttonPrevious == LOW)
  {
    if (ledState == LOW)
    {
      ledState = HIGH;
      Serial.println(StreamOn);
      Serial.println(Start);
    }
    else
    {
      ledState = LOW;
      Serial.println(Stop);
      Serial.println(StreamOff);
    }
  }

  digitalWrite(led, ledState);

  buttonPrevious = buttonCurrent;
}

Object detection

Tue, 03 Mar 2020 17:22:53 +0000

I am currently learning how to use the object detection module, i have followed the tutorials for the module but everytime i try to save a object i dont get a green box around the object aka the software dosent recognize it. i cant seem to figure out why i cant get it to work, it should just be a few simple commands but acording to the module tutorials, but no results. Any tips on how to fix this or just how to get it to work?

How can I store a Video frame by frame to the sdcard of my A33 cam

Mon, 02 Mar 2020 14:16:13 +0000

I wrote a Python code for storing a video on the sd-card of my a33 cam. My problem is, that the Filename will be stored, but I cannot write frames after opening the file. Here you can see my Python code. In the line "jevois.sendSerial(str(cap.isOpened()))" i can read, wether the File is opened or not. I always get the answer "false" (that means File not opened). I do not know what is wrong, where is my mistake. Can everybody help me? Every Tipp will be ok. Thank you.

def VideoSpeichern(self, frame):

    jevois.sendSerial("VideoSpeichern")

    cap = cv2.VideoCapture(0)

    # Der Dateiname besteht aus Objekt, Datum und Uhrzeit. Dies wird hier zusammengefuegt.

    now = datetime.now() # aktuelles Datum und Uhrzeit

    date_object = now.strftime("%Y%m%d") # Heutiges Datum in date_object ablegen

    time_object = now.strftime("%H%M%S") # Aktuelle Uhrzeit in time_object ablegen

    PfadDatei = ("modules/Dambrowsky/OpenCVObjektErkennungBilderVideo/BilderVideos/     Person"+"_"+str(date_object)+"_"+str(time_object)+".avi")

    # codec definieren und VideoWriter Objekt erzeugen

    fourcc = cv2.VideoWriter_fourcc(*'DIVX')

    out = cv2.VideoWriter(PfadDatei,fourcc, 20.0, (640,480))

    jevois.sendSerial(str(cap.isOpened()))

    start = time.time()

    while(cap.isOpened()):

        ret, frame = cap.read()

        jevois.sendSerial(str(ret))

        if ret==True:

            frame = cv2.flip(frame,0)

            # frame in Datei schreiben

            out.write(frame)

            end = time.time()

            jevois.sendSerial(end - start)

            if (end - start > 30):

                key = ord('q')

                break

        else:

        break

    # Alles wieder am Ende schliessen

    cap.release()

    out.release()

DemoSaliency headless

Fri, 28 Feb 2020 15:40:35 +0000

Hi all,
I have been playing with Jevois for a few years now and while I like it a lot I can't use it for what I want it for and the extensive documentation always seems to hit a wall.

All I want is the X/Y output of the salient point, and the 'whiteness' of that point. I already get this out of it running demoSaliency, but the applications I want to use it for simply do not allow for a USB connection.

Perhaps I'm missing how to set something like this in the literature- if anyone can help me out with this I would deploy Jevois in some of my applications as a 'simple' smart sensor; so far it remains a curiosity (with a FANTASTIC demo of saliency visualization)

Thank you!

How to detect new objects in Jevois inventor

Fri, 28 Feb 2020 13:02:19 +0000

Im trying to learn how to detect objects with the jevois inventor, im following the live training tutorial but its never stated where i should add the commands "setpar showwin true" and "Save Somename" ? i have tried to type them into the config but that didnt work.

Jevois doesn't work after Raspberry PI reboots

Sun, 16 Feb 2020 20:16:29 +0000

I've come back to my Jevois after not looking at it for a year or so. I'm resurrecting an old project that I had almost working, but starting with a fresh install of everything. Raspberry Pi 3B powering the Jevois with the two headed USB cable.

I have a python program that runs Jevois and communicates by reading and writing via serial. I have it set up as a daemon to run on startup. When I run it by manually starting it, it runs fine. When I let it run automatically after a reboot, it does not work. I have a log file and I can see that it's not getting any response from the Jevois when run this way. I've tried increasing the wait time before the script fires up and that doesn't seem to help. When I run it via a manual restart after rebooting, it also doesn't work. It only works if I unplug the Jevois and plug it back in, and then start the daemon.

If I stop the daemon, guvcview runs fine. I do get some errors that might not be useful:

GUVCVIEW: capture_cond wait timedout (5 sec)
V4L2_CORE: Could not grab image (select timeout): Resource temporarily unavailable

Even after I run guvcview, the daemon doesn't work without a restart of the jevois.

Any ideas?

Jevois daemon hangs (solid green) upon Jevois-Inventor startup

Thu, 13 Feb 2020 06:08:43 +0000

This problem started last week. I'm using jevois 1.15 and jevois-inventor beta 0.5 on my Ubuntu 18.04 - not VM.

My camera suddenly stopped displaying video on my host computer, but still works in headerless mode. This error arose as I was creating a module's script.cfg file, which I've since deleted. Whenever I try to use Jevois-Inventor (or any other webcam viewer, for that matter) Jevois's LED turn solid green, and the computer doesn't recognise it is connected (I cease being able to communicate with the camera, and I get a notification that a USB device has been disconnected). I get no errors printing in terminal when I use other viewers, but whenever I attempt running Jevois-Inventor from terminal, it prints this error:

"QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once QUrl("http://jevois.org/version")"

and

"Unable to query the parameter info: "Invalid argument""

and

"CameraBin error: "Could not read from resource.""

Similarly, I have not been able to operate the camera in PassThrough mode, and running the daemon on my host computer, despite aligning USB mode of PassThrough with the module I intend to run. Instead, video is streamed from my laptop's webcam.

I should note, I've no problems operating the camera in headerless mode (by issuing commands to the Jevois via serial socket connection, or "jevois-cmd" command). Also to note, other usb camera work fine on my computer.

Has anyone experienced anything similar, or have and sage words of advice?

Thanks!

How do I save JeVois camera images on my arduino

Wed, 12 Feb 2020 19:25:25 +0000

How do I save images on the sd card or on the arduino. I have a sd card holder on my arduino

How do I save pictures if it's hooked up to a microcontroller

Wed, 12 Feb 2020 19:14:49 +0000

I'm going to hook it up to a microcontroller similiar to an arduino. How do I save the pictures and how do I take them in. Do I need a microsd card slot on my microcontroller

Saving video directly to a PC

Tue, 11 Feb 2020 17:36:13 +0000

I have a quick question about saving videos with the jevois camera. I was wondering if it is possible to save a video recorded by the jevois directly to the host computer the camera is connected to. Basically what I am looking for is the "Save Video" module, but instead of saving the video to the sd card in the jevois camera, I want to save the video directly to a folder on the host computer the camera is connected to.

edit: I actually found a solution on my own. I found the page "Getting started on a windows host computer" and downloaded AMCap, which meets all my needs since it allows me to record the video stream.

Read Only File System after sendSerial?

Sun, 09 Feb 2020 20:32:22 +0000

I've had this happen twice now, on two different JeVois cameras, two different SD cards. One of the SD cards was a year old, so had an old Jevois image. The other was flashed brand new today.

I have a script running. It's a fairly straightforward First Robotics type script.
Start the script.
Open up a new text file to save some data about the coming run.
Start acquiring and processing images. Find targets and draw the target outline on the screen. Save target locations in the text file mentioned above.
Send processed frame via outframe to the host.

So far so good. It runs. I see exactly what I expect to see in Inventor, or whatever happens to be viewing the output stream.

Now......add one line:
jevois.sendSerial("A 1.23 ")

(That is in fact the exact line I'm sending. Of course in the future I will send target coordinates instead of "1.23", but I'm testing serial communications now.)

Restart jevois, and in inventor, it now tells me it can't open the text file because it's a read only file system. Throw exception and stop.

Well now that's odd.
Try to take out the sendSerial line by editing in Inventor. It can't save the code. The file system is read only.

The first time it happened I thought it must be coincidence and somehow I managed to corrupt the SD card with something unrelated, so I dug out another camera, flashed a brand new SD card, and exactly the same thing happened. This time I opened the file system in Windows, went into the module code and manually edited it out, ejected the disk, and brought it up in inventor again. Same error message. Looking at the code, the sendSerial line is gone, but I still can't run the program or save any changes. The file system appears to be read only, at least to the jeVois software. I can open it and write to it in Windows (via enabling access to the file system, from the Inventor button.)

The exact error message is OSError: [errno 30] Read-only file system: 'targetData.txt'

(targetData.txt is the name of the file that I open up at the beginning to save found target data.)
Greatly abbreviated code below:
import libjevois as jevois
import cv2
import numpy as np
import random
import math

class RoboCon_320_240_30:
def __init__(self):
...Do a bunch of initialization

   self.datafile=open("targetData.txt","w+")

def substance(self,inimg):
...Do the major processing. Called from either process or processNoUSB

def process(self, inframe, outframe):
   inimg=inframe.getCvBGR()
   ….Do a bunch of stuff to it
   ........call substance()
   jevois.sendSerial("A 1.23 ")
   outframe.sendCv(processedimage)

Everything is fine, until I insert that sendSerial line. Then it stops working and the file system is read only.

Any ideas?

Darknet YOLO Freezing

Fri, 07 Feb 2020 21:55:45 +0000

Hi, I have purchased a new Rasberry Pi 3B,

I have manged to get the Darknet YOLO example working on my Raspberry pi but it only works for about 30 seconds and then it freezes?

I have tried changing the power adapter and I have also swapped the USB cable but I am still having no luck.

All the other examples seem to work ok it just seems to be the two Darknet ones that are freezing but these are unfortunately the ones the I need, please can someone point me in the right direction?

Thanks for the help

Jevois-daemon freezing after ~2 seconds

Mon, 03 Feb 2020 06:19:09 +0000

I recently got my hands on two of your little cameras and I have to say they are quite excellent. I had no issues with Jevois-inventor on PC. However for the last few days I have had nonstop issues trying to get the SDK working on a virtualbox running on OSX.

Jevois-inventor as well as Jevois-daemon stream video for around 2 seconds and then freeze. They unfreeze roughly 4-6 seconds later to only freeze again within a second or less.

Background on my setup:

Mac Mini 2012 Late 2.3 GHz with 8 GB of Ram (USB 3.0 on all ports)
Virtualbox 6.1.2 r135662 with the corresponding extensions pack
jevois-1.14.0-ubu1804.vdi precompiled image with SDK
2x JeVois-A33 Smart Cameras (bought within the last two weeks)
Logitech C920 HD Webcam

Through extensive testing I have found the following configurations to work. The corresponding settings are found under as sub-points. All configurations have the filters set for both external cameras, as well as a virtualbox configured with 4 cores, 5.7 GB of RAM, and xHCI controllers enabled.

JeVois Camera in guvcview (No stuttering, working as dumb camera)
1. Unselected under devices>USB
2. Selected under devices>Webcam
3. Running JeVois PassThrough module configured as YUYV 640 480 30.0 YUYV 640 480 30.0 JeVois PassThrough
Logitech C920 Webcam in guvcview (No stuttering, working as dumb camera)
1. Unselected under devices>USB
2. Selected under devices>Webcam
JeVois Camera in jevois-inventor (Stuttering/freezing, working as PassThrough dumb camera)
1. Selected under devices>USB
2. Running JeVois PassThrough module configured as YUYV 640 480 30.0 YUYV 640 480 30.0 JeVois PassThrough
3. Camera must be unplugged and plugged back in once jevois-inventor is started in order to be found and begin streaming video in jevois-inventor
JeVois Camera in jevois-daemon (Stuttering/freezing, working as dumb camera)
1. Selected under devices>USB
2. Running JeVois PassThrough module on physical JeVois Camera configured as YUYV 640 480 30.0 YUYV 640 480 30.0 JeVois PassThrough
3. Running JeVois PassThrough module on host-based jevois-daemon configured as YUYV 640 480 30.0 YUYV 640 480 30.0 JeVois PassThrough
Logitech C920 Webcam in jevois-daemon (Stuttering/freezing, working as dumb camera)
1. Selected under devices>USB
2. Running JeVois PassThrough module on host-based jevois-daemon configured as YUYV 640 480 30.0 YUYV 640 480 30.0 JeVois PassThrough

I have rebuilt and been running jevois-daemon through the SDK after rebuilding it with ~/jevois/rebuild-host.sh. The clean performance of the camera module and webcam on guvcview suggests that the problem is likely localized to my host hardware or my jevois software configuration.

Based on the behavior, it sounds like it could be a buffer issue as suggested in this thread. However, I have tested jevois-daemon with the --serout=None launch parameter and the freezing/stuttering continues. However, when stuttering occurs, the jevois-daemon console freezes up and does not respond to commands until the stream unfreezes.

I have no issues running these pass-through configurations on my windows PC running jevois-inventor.

Sending commands from python to serial command line

Thu, 30 Jan 2020 21:02:13 +0000

Hi,

I am trying to find a way to send a command to the serial command prompt from within the PythonTest module. I saw that there is the command jevois.sendSerial(), but this just sends the text as a message to the command prompt. Is there a way to send text to the serial command prompt (like listmappings) from within a module where the camera will treat it as a command and try to execute it?

How to fix "Are you using old TFLite binary with newer model?"

Wed, 29 Jan 2020 18:48:35 +0000

I have a very small custom model built with tensorflow 2.0 that I can convert to a model.tflite and run it on a Coral, but when I load this model into the jevois and run the jevois tensorflow saliency demo I get the following error, from the console.

INF TensorFlow::operator(): Loaded model /jevois/share/tensorflow/fma224/model.tflite

ERR TensorFlow::Report: Op builtin_code out or range: 74. Are you using old TFLite binary with newer model?

ERR TensorFlow::Report: Op builtin_code out or range: 82. Are you using old TFLite binary with newer model?

ERR TensorFlow::Report: Registration failed.

FTL TensorFlow::operator(): Failed to construct interpreter

Where does the TFLite binary live so that I can replace it with a new one?

what version of tensorflow does the jevois use by default?

Issue in running custom Tensorflow network

Sat, 25 Jan 2020 22:19:27 +0000

Hi,

I am trying to run a custom tensorflow network on Jevois but it is giving me a hard time. The following is what I have done so far:

I am using Vgg16 network from https://github.com/qubvel/classification_models and have trained it on my own dataset and then saved the model in a h5 file.

I then converted the h5 file to tflite file to deploy it on Jevois.

Following the Jevois custom training tutorial, I have put the tflite file and labels.txt file in Jevois sd card on this path: /share/tensorflow/recycle

Now when I connect the camera and select the TensorFlow easy module in Jevois-inventor, it shows the picture and hangs there and then gives error saying "Malformed Jevois Software version from Jevois Camera Disconnecting..." and then the software exits. I don't know what could be the problem. The input for the network is 224 x 224 so I have set it using foa. The tflite file I got is about 65MB in size and I saw some other tflite files they have a smaller size may be that could be the problem? I would really appreciate if somebody could guide me in the right direction. Thanks.

JeVois A33 powers up but LED stays green

Fri, 24 Jan 2020 18:28:22 +0000

I bought the JeVois A33 kit (camera, Y cable, SD card and adapter) kit from Amazon. The camera seems to power up (solid green LED and cooling fan spins), but it doesn't enumerate to Windows 10, and I never get any orange flash or solid orange on the LED. I've tried reflashing the MicroSD card as well as using a 64GB Sandisk card, with the current image and the latest archive image.

Is there a way to diagnose where in the boot sequence it's getting stuck?

Thanks in advance.

Tensorflow lite Object Detection

Tue, 21 Jan 2020 21:00:56 +0000

Hello,
I'm developing a project using tensorflow 1.15 to detect multiple objects. To start with the JeVois card, I followed the tutorial:

*http://jevois.org/tutorials/UserTensorFlowTraining.html

By following several online tutorials, I was able to customize and train my model. I've checked my model and it works fine on the computer. So I decided to export it in a lite version. I use the following command:

tflite_convert \

  --graph_def_file=tflite/tflite_graph.pb \

  --output_file=tflite/jevois_model.tflite \

  --input_format=TENSORFLOW_GRAPHDEF \

  --output_format=TFLITE \

  --input_shape=1,128,128,3 \

  --input_array=normalized_input_image_tensor \

  --output_arrays='TFLite_Detection_PostProcess','TFLite_Detection_PostProcess:1','TFLite_Detection_PostProcess:2','TFLite_Detection_PostProcess:3' \

  --inference_type=FLOAT \

  --input_data_type=FLOAT \

  --allow_custom_ops

Once I get the model in lite version, I change the name to model.tflite and I also create my labels file. However, when I try to make it work on the card, the following message is displayed

Loading network

Please wait...

I've waited several minutes (20) and the model never initializes. could you help me? Because I don't know what the problem could be.

Any OpenCV Python demo to stream data directly from JeVois as a UVC camera?

Sun, 19 Jan 2020 17:31:16 +0000

Any OpenCV Python demo to stream data directly from JeVois as a UVC camera?

I noticed from http://jevois.org/doc/ProgrammerPython.html,

import libjevois as jevois

On my host, I actually built https://github.com/jevois/jevois from scratch.

But, it seems there is NO python-libjevois generated ? So, what python package should I build/install to generate a python module libjevois?

Thank you very much.

I've added a custom C++ module and JeVois Inventor can't connect to the camera

Sun, 19 Jan 2020 17:21:14 +0000

Hello!

I've developed a C++ module with a number of components inside. It successfully runs in both regular and headless modes but I can't connect to the camera from JeVois Inventor. The only solution I've found is to remove my module. Do you have any ideas how I can fix this problem?

JeVois Frequently Freezing

Sat, 11 Jan 2020 01:41:23 +0000

Hello,

I just got my JeVois and am running into a problem. I flashed the SD card with the latest image (SD card came with the beginner kit) and plugged the USB cable (also supplied with the beginner kit) into a USB 3.0 port on a MacBook Pro.

When I run the TensorFlowSingle (464x240) in either JeVois Inventor or Webcamoid it will work for anywhere from 10s to 1m, then freeze.

If using Inventor, that's it -- I need to unplug/plug the device to get it back. If using Webcamoid, I have to stop/start the camera a few times to get it back.

I'm just using out of the box demos per instruction with all JeVois parts...so I don't think I'm doing anything wrong.

I can't imagine this is normal. It seems like a cool device, but if it freezes so frequently, I can't use it in my device. Any suggestions?

Thanks!

Nick

Jevois is not detected by Linux (Ubuntu 18.04.3 LTS)

Tue, 07 Jan 2020 20:32:05 +0000

Hello,

A month ago I worked with the card and it worked beautifully. After a few days of rest I reconnected everything and it doesn't works. I can't share the video and even linux doesn't detect the card (with "dmesg" command). I have already installed another microSD and I have also verified the correct insertion of the card. Also I connected the card in others machine and its the same problem.

Could someone guide me what could be the problem?

Green light remains on, fan turns on, camera not detected by Windows

Sat, 28 Dec 2019 03:52:00 +0000

Hi,

I purchased a JeVois Camera Beginner Turnkey kit at RobotShop.com last summer. Though, I only had time to play with it during the holidays. The green LED and fan turn on, but LED does not flash orange and does not later turn solid orange. The card is fully inserted and I properly hear the click sound.

I tried powering the camera with the Y cable or a single cable on

- my laptop with a HUB

- a desktop

- directly from an apple and amazon chargers

I tried re-flashing the provide 16 GB Micro SD card and another Sandisk Ultra 32 GB Micro SD card. None of them work.

I don't know what else to do to troubleshoot the camera.

Please help.

Thanks.

Update the time in jevois each time automatically.

Thu, 26 Dec 2019 04:46:56 +0000

I'd like to update the time in jevois with the time on host computer when the jevois restarts each time. I found that the jevois-inventor provides the feature to flash the current time on host computer.

I need a program in Phyton to integrate some more pictures.

Sun, 22 Dec 2019 10:25:10 +0000

I am using MobileNet + SSD trained on Pascal VOC (20 object classes) , Caffe model for my Robot. It is fucntioning very good with my own Phyton software. Now I want to train some more Pictures (up to 10) in this system and I do not know, how to do it. Is it possible and when, how? Has anybody an example software to do this?

Thank you and best regards

Peter

Is it possible to send both image and IMU data back to host computer through USB cable?

Fri, 20 Dec 2019 03:16:11 +0000

I come up with one idea. IMU data at multiple timestamp can be stored in one image which is alway sent to host computer in process() function. Is there better way to send the IMU data without coupling of the image data?

Thanks in advance.