Image from command line

Question

Is there any way to use the command line interface to show ASCII values of the current image? I want to connect to an Arduino Uno which is connected to a SIM900 shield. I hope to be able to transfer the image to a web folder

Answer 1

Yes, you would write a small python module that runs on jevois and simply:

- get the next image as a numpy array in your process() function

- in there, just loop over the pixels and issue a bunch of jevois.sendSerial() commands to send the values over the serial port

have a look here to get started:

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

in this code:

import libjevois as jevois

import cv2

import numpy as np

class Hello:

  def process(self, inframe, outframe):

    img = inframe.getCvBGR()

    outframe.sendCv(img)

you would implement that looping over pixels and sending the serial messages using jevois.sendSerial() before the last sendCv() line.

examples of jevois.sendSerial() are here: http://jevois.org/tutorials/ProgrammerInvSerial.html

Note that at this point you would still be streaming video. Once this works in the inventor, you would convert your code to headless by implementing a processNoUSB() function with essentially the same code as in process() except no sendCv() line at the end. See http://jevois.org/tutorials/UserHeadless.html for more info about headless mode.