Tag Archives: antialiasing

Computing gradients on grids of pixels and voxels – forward, central, and… diagonal differences

Posted on February 28, 2021 by bartwronski

In this post, I will focus on gradients of image signals defined on grids in computer graphics and image processing. Specifically, gradients / derivatives of images, height fields, distance fields, when they are represented as discrete, uniform grids of pixels … Continue reading →

Posted in Code / Graphics | Tagged antialiasing, digital signal processing, graphics programming, image processing, signal processing, supersampling | 8 Comments

Checkerboard rendering, rotated anti-aliasing and grid frequencies

Posted on May 14, 2018 by bartwronski

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 | 5 Comments

Updated Poisson-like generator with GUI and more

Posted on September 5, 2014 by bartwronski

Just a super short note: I updated my simple rendering-oriented Poisson-like pattern generator with: Very simple GUI made in PyQt to make experimenting easier. Option to do rotating disk (with minimizing rotated point distance) for things like Poisson bokeh / … Continue reading →

Posted in Code / Graphics | Tagged algorithms, Anaconda, antialiasing, graphics programming, mathematica, poisson, programming, pyqt, python, stochastic | Leave a comment

Hair rendering trick(s)

Posted on July 20, 2014 by bartwronski

I didn’t really plan to write this post as I’m quite busy preparing for Siggraph and enjoying awesome Montreal summer, but after 3 similar discussion with friends developers I realized that the simple hair rendering trick I used during the … Continue reading →

Posted in Code / Graphics | Tagged algorithms, antialiasing, graphics, graphics programming, the witcher 2: assassins of kings, witcher 2 | 7 Comments

C#/.NET graphics framework on GitHub + updates

Posted on June 8, 2014 by bartwronski

As I promised I posted my C#/.NET graphics framework (more about it and motivation behind it here) on GitHub: This is my first GitHub submit ever and my first experience with Git, so there is possibility I didn’t do something properly … Continue reading →

Posted in Code / Graphics | Tagged .NET, algorithms, antialiasing, C#, graphics, graphics programming | Leave a comment

Temporal supersampling pt. 2 – SSAO demonstration

Posted on April 27, 2014 by bartwronski

This weekend I’ve been working on my Digital Dragons 2014 presentation (a great Polish game developers conference I was invited to – if you will be somewhere around central Europe early May be sure to check it out) and finally got … Continue reading →

Posted in Code / Graphics | Tagged algorithms, antialiasing, assassin's creed, graphics, graphics programming, next-gen, PlayStation 4, postprocessing, stochastic, supersampling, temporal, temporal supersampling, Xbox One | 8 Comments

Temporal supersampling and antialiasing

Posted on March 15, 2014 by bartwronski

Aliasing problem Before I address temporal supersampling, just a quick reminder on what aliasing is. Aliasing is a problem that is very well defined in signal theory. According to the general sampling theorem we need to have our signal spectrum … Continue reading →

Posted in Code / Graphics | Tagged algorithms, antialiasing, assassin's creed, graphics, graphics programming, PlayStation 4, postprocessing, programming, stochastic, supersampling, temporal, temporal supersampling, Xbox One | 22 Comments