You're right. It is the terrible jpeg compression which destroys everything.
This is an example of an image from my daughter's VGA camera: https://imgur.com/oMNkrUm
The image has ~100 KB which is plenty for this resolution. But the input data from the sensor is awful because the sensor and the optics are awful.
This is an example of an image from my daughter's VGA camera: https://imgur.com/oMNkrUm
The image has ~100 KB which is plenty for this resolution. But the input data from the sensor is awful because the sensor and the optics are awful.