All Questions
Tagged with noise image-processing
4 questions
9
votes
3
answers
2k
views
What's a proper way to clamp dither noise?
When reducing color depth and dithering with a 2 bit noise (with n=]0.5,1.5[ and output=floor(input*(2^bits-1) + n)), the ends of the value range (inputs 0.0 and 1.0) are noisy. It would be desirable ...
- 103
3
votes
2
answers
254
views
Downscaling by skipping rows and columns – any example images?
I'm about to implement downscaling on a microcontroller. Source resolution is e.g. 720x576 (the 576i PAL resolution, other one possible: 480i, NTSC resolution), destination is 32x16. The goal is to ...
- 33
16
votes
1
answer
2k
views
Why does increasing simplex noise dimension wash it out?
I just tried using this approach to create a tiling 2d simplex noise function with Gustavson's java implementation. The result tiled, but the texture seemed muddy / washed out.
I decided to compare ...
- 377
1
vote
0
answers
54
views
How do you sample an analogue image and store it in a true-colour frame buffer? [closed]
I really cannot get my head around on this issue - how does an analogue image is sampled and then stored in a ture-colour frame buffer (e.g. in a camera) and how do you prevent noise when you do so? ...
- 11