[siwjtvud] Nearly lossless image or video compression

Is there a point where any further higher quality image compression is just recording camera noise?

For light images, probably not in brightness resolution (1 part in 256). For dark images, probably yes.

For spatial resolution, are most camera's optics as good as one pixel? Probably. Lens grinding is an old art. Then again, the Mars rovers took better pictures than most digital cameras despite having less megapixels because of better optics.

Temporal resolution in video: motion blur. Complicated relationship with spatial resolution.

We can fall back to the measure of a compression quality high enough that a sample of humans cannot perceive the difference from the original. There are a bunch of parameters of such a human test: whether the human is asked whether the samples are simply different, or asked to choose which has higher quality. Whether the human is told in advance the type of compression artifacts to look for. Whether the movies are seen side-by-side or one after another.