• type: pip install numpy and press enter. After the installation is done.
• type: pip install opencv-python and press enter, close the command prompt.

https://how2electronics.com/color-detection-tracking-with-esp32-cam-opencv/

another page:

https://randomnerdtutorials.com/esp32-cam-opencv-js-color-detection-tracking/

• Installing tesseract in linux

Tensorflow Image Recognition in ROS

https://github.com/ipa320/cob_object_perception

http://wiki.ros.org/cob_read_text

https://github.com/vonovak/text_locator

read_text - ROS Wiki

• camera.py
• preprocessing.py