-
Recent Posts
- Local linear models and guided filtering – an alternative to bilateral filter September 22, 2019
- How (not) to test graphics algorithms August 14, 2019
- Checkerboard rendering, rotated anti-aliasing and grid frequencies May 14, 2018
- Tech and scientific writing – graphics, diagram and graph creation tools October 22, 2017
- Separable disk-like depth of field August 6, 2017
Archives
- September 2019 (1)
- August 2019 (1)
- May 2018 (1)
- October 2017 (1)
- August 2017 (1)
- April 2017 (2)
- October 2016 (4)
- September 2016 (2)
- August 2016 (1)
- June 2016 (1)
- October 2015 (2)
- March 2015 (2)
- February 2015 (1)
- December 2014 (1)
- October 2014 (1)
- September 2014 (4)
- August 2014 (4)
- July 2014 (2)
- June 2014 (2)
- May 2014 (2)
- April 2014 (3)
- March 2014 (5)
- February 2014 (2)
- January 2014 (3)
Categories
Author Archives: bartwronski
Local linear models and guided filtering – an alternative to bilateral filter
Intro In this blog post I am going to describe an alternative tool for the graphics and image processing programmers’ toolbox – guided filtering. Guided filtering is a really handy tool that I learned about from my coworkers, and I … Continue reading
Posted in Code / Graphics
Tagged bilateral, graphics, image processing, machine learning, postprocessing, python, signal processing, ssao, upsampling
2 Comments
How (not) to test graphics algorithms
Intro Siggraph 2019 is sadly over, but as always I came back super inspired and grateful for meeting many friends. Conferences are mostly not about seeing the presentations – but about all the interesting and inspiring discussions, and one of … Continue reading
Posted in Code / Graphics
Tagged code design, code style, graphics, graphics programming, programming, siggraph, testing, tests
Leave a comment
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
Tech and scientific writing – graphics, diagram and graph creation tools
Few days ago, I asked a question on twitter: https://twitter.com/BartWronsk/status/919618905319997440 “What is industry/academic standard for diagrams in tech writing? PowerPoint/GoogleDocs diagrams? Dedicated tool like Visio/Dia? Procedural? I usually use first, but far from satisfied…For proc tried SVG,JS,Graphviz,even Mathematica, but results … Continue reading
Separable disk-like depth of field
This is a short note accompanying shadertoy: https://www.shadertoy.com/view/lsBBWy . It is direct implementation of “Circularly symmetric convolution and lens blur” by Olli Niemitalo (no innovation on my side, just a toy implementation) and got inspired by Kleber Garcia’s Siggraph 2017 presentation “Circular … Continue reading
Posted in Code / Graphics
Tagged bokeh, depth of field, dof, far cry 4, Gaussian, maths, photography, poisson, postprocessing, separable, witcher 2
2 Comments
Cull that cone! Improved cone/spotlight visibility tests for tiled and clustered lighting
In this blog post, I will present some common spotlight culling techniques and propose one small improvement that is able to correct results of cheap, tiled / clustered culling on the CPU/GPU with almost negligible ALU cost. If you know … Continue reading
Posted in Code / Graphics
Tagged cone, culling, geometry, graphics, ideas, lighting, mathematica, mathematics, occlussion, programming, sphere, spot, visibility
9 Comments
Small float formats – R11G11B10F precision
While this post is not yet dithering related, it is in a way a part of my series about dithering. You can check index of all parts here or check the previous part. I will talk here about use of … Continue reading
Posted in Code / Graphics
Tagged float, floating point, floats, graphics, mathematica, mathematics, noise, programming, quantization, rendering
6 Comments
