Maximizing image quality from image data

Question

My project uses an OV2640 sensor on an ESP32-CAM board.

I need to get the raw RGGB data from the sensor. However, due to Omnivision unwiligness to provide the datasheet for this sensor (the one online is only a partial version). I can only get the data in Jpeg (relatively high compression), YUV422 or RGB565.

In all these cases, the original 10 bit per pixel bayer data has been "tinkered" with and degraded to produce data that I get.

In my tests, for a 320*240 image, in jpeg, the compressed image is 10KB, in YUV it is of course 75KB and twice this (150KB) in RGB565 mode...

Now, the problem is that these all represent tinkered versions of the sensor original bayer (RGGB) data (at 8 bit per pixels).

What is the best way to recover (as closely as possible) the original RGGB values for each of the pixels?

Thanks, Cyrille

Answer 1

according to the datasheet it is possible to do what you are intending. look for the register called IMAGE_MODE (0xDA) and image format RAW10, which can return YUYV format (and YVYU, UYVY, VYUY)