JeVois  1.14
JeVois Smart Embedded Machine Vision Toolkit
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Changes and new features in JeVois 1.14

JeVois 1.14 brings the following new features:

  • Bumped to OpenCV 4.1.1 with all contrib modules including deep neural networks (DNN) and non-free.
  • New automatic camera sensor detection. It is now optional to write a file BOOT:sensor with the name of the sensor installed in your JeVois smart camera (ov9650, ov7725, ov2640, ar0135, etc). You will still speed-up your JeVois boot time if you have the correct sensor in BOOT:sensor, but JeVois will now try all supported sensors in turn until one that works is found. The Allwinner kernel video capture driver has been modified to allow proper unloading and re-loading (unloading used to hang and crash with the manufacturer's code), and to detect the sensor synchronously at load time (as opposed to delegating detection to a kernel thread).
  • Currently, the order of detection is: sensor specified in BOOT:sensor or ov9650 if there is no BOOT:sensor file, ov7725, ov2640, ar0135, ov9650. You will see one orange LED flash for each sensor that the JeVois smart camera tries to detect at boot up. Once the correct sensor is found, the LED will turn solid orange after a few seconds.
  • Global JeVois parameter camerasens allows one to know which sensor is installed. Just type:
    getpar camerasens
    
    in the JeVois Inventor console to get the value.
  • New deep networks:
    • MnasNet optimized autoML networks supported in TensorFlowEasy
    • inception_v1_224_quant_20181026 high accuracy (but slow) network supported in TensorFlowEasy
    • new parameter model in DetectionDNN to allow one to select a network easily at runtime, without needing to edit the module's params.cfg file.
  • Improved ov2640 image capture for low resolutions (CIF and lower). The captured images at low-resolution previously were very dark and zoomed-in compared to higher resolutions. This is now fixed. This is true hardware CIF (plus DSP-based scaling down for even lower resolutions), so it supports the hardware-advertized max frame rate of 60fps (as opposed to approaches used in other drivers found on the web which capture at VGA with max 30fps and then use the on-board DSP to scale down).
  • Minor improvement to color balance with AR0135 sensor.
  • For C++ programmers: new Parameter<T>::reset() resets a parameter to its default value.