Total noob here, Reasonable expectation (FPS) OCR+OAK

RigoRenteria

I'm trying to read a numerical value shown on a laptop screen on an area +/- 50px X 200 px that refreshes 20 times per second the format is X.XX and it can be negative so -X.XXX, the third decimal is the one changing very fast +/- 20times second, the second +/- 15times second, first decimal 10 fps, and the first digit to the left +/- 3 fps , I'm currently using easyocr/python with a mediocre gpg and get +/- 6FPS with good accuracy. The problem is 6FPS is just too slow for my intended use. then stumbled upon the Luxionis cameras and was exited that this tech available at a reasonable price for the average Joe. Now that I see these cameras exists, I'm wondering if I can use an OAK-1 to read this value directly out of the screen monitor, this will be done in a controlled environment that will never change, and the font will never change, in fact the font can be any color with a gray background. I don't need detection because it will always appear on the same location, I may need ROI to specify where. I'm asking here for advise given the situation what would be a realistic out put of the recognized values per second? I would like to know this before I embark in this direction

erik

Hi @RigoRenteria ,
It mostly depends on the model. Since we sell hardware-only, the NN model training is up to the user. We have 2 demos that might be relevant:

7semgnet recognition - 13FPS
https://docs.openvino.ai/2023.1/omz_models_model_text_recognition_0012.html runs at about 17.5FPS on-device, demo here.

That said, this seems like a very hobby project, so I am not sure why you'd need an AI camera, instead of just running inference on a different computer (I'll assume doing screen capture on initial laptop isn't possible).
Thoughts?
Thanks, Erik

RigoRenteria

erik Well I said laptop for practicality, just to lay down the problem, but in reality it is a mesa archer 3 ( (https://junipersys.com/products/archer_3) for gnss . I need to extract a constantly changing value out of it. Since this will be performed out in the field I thought it was possible to use the camera to do de heavy lifting and spit out the values to a pi being used as a logger for the values.

erik

Hi @RigoRenteria ,
Since it's android, would it be possible to run custom android apps on the Archer3? Seems like it would be much more robust solution compared to looking at screen. Ohter option would be to just use different solution that has GNSS coordinates and allows programmability.