If 1- Optically speaking, an image point (or pixel) is a light interference pattern
2- interference patterns require phase coherence
3- the source of the image point must emit coherent light
4- common image points (or pixel) represent a source larger than one atom
5- the coherent light must be emmited by a source bigger than one atom
My first question is do you find errors in the above logic ?
Then if the above is true, then let's imagine we take the picture of a bright light bulb in a dark room, how can you explain that the filament emits coherent light in areas big enough to create image points?
Furthermore let's imagine the picture taken from an object lighted by several bulbs, how could such object reflect light coherent enough for the image to be formed ?