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Recent Posts
- Dimensionality reduction for image and texture set compression May 21, 2020
- “Optimizing” blue noise dithering – backpropagation through Fourier transform and sorting April 26, 2020
- Bilinear texture filtering – artifacts, alternatives, and frequency domain analysis April 14, 2020
- Using JAX, numpy, and optimization techniques to improve separable image filters March 15, 2020
- Separate your filters! Separability, SVD and low-rank approximation of 2D image processing filters February 3, 2020
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Categories
Tag Archives: sampling
Checkerboard rendering, rotated anti-aliasing and grid frequencies
This post is inspired by three interesting statements or questions that I heard and are interconnected by non-obvious theory: First was regarding so called checkerboard rendering (example1 example2) – what is advantage of using it? After all it’s the same as … Continue reading
Posted in Code / Graphics
Tagged antialiasing, fourier, frequency domain, sampling, signal theory, supersampling
4 Comments
Dithering part three – real world 2D quantization dithering
In previous two parts of this blog post mini-series I described basic uses mentioned blue noise definition, referenced/presented 2 techniques of generating blue noise and one of many general purpose high-frequency low-discrepancy sampling sequences. In this post, we will look … Continue reading
Posted in Code / Graphics
Tagged bayer, blue noise, dithering, fourier, graphics, graphics programming, interleaved gradient noise, mathematica, mathematics, maths, noise, programming, sampling
6 Comments
Dithering part one – simple quantization
Introduction First part of this mini-series will focus on more theoretical side of dithering -some history and applying it for 1D signals and to quantization. I will try to do some frequency analysis of errors of quantization and how dithering … Continue reading
Posted in Code / Graphics
Tagged dithering, mathematica, mathematics, noise, programming, sampling
2 Comments
Dithering in games – mini series
This an opening post of mini blog post series about various uses of dithering for quantization and sampling in video games. It is something most of us use intuitively in every day work, so wanted to write down some of … Continue reading
Posted in Code / Graphics
Tagged blue noise, dithering, graphics, graphics programming, mathematica, noise, programming, sampling
6 Comments
