3 ms·
Slight variations of contrast seem like they could be easily countered by stacking all pictures and averaging them. The strongest signal will be that which is p
by persnickety 2y ago
Slight variations of contrast seem like they could be easily countered by stacking all pictures and averaging them. The strongest signal will be that which is present on each image, that is the brightness variation. Afterwards smooth out as needed and subtract from every image before stitching.
I'm surprised it wasn't mentioned, was it tried and found insufficient?
- bunnie 2y agoActually there is some image stacking and averaging happening because there's a lot of overlap between the images, and some trials were done with 4x oversampling and averaging. Probably the next thing to do is to put a diffuser on the LEDs to improve the uniformity of lighting. I think some of the hot-spotting has to do with the radiation pattern of the LED itself, if you just look at it on a blank sheet you can see a bit of a halo on the pattern.