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Video Game Blurs (and how the best one works)

(blog.frost.kiwi)
277 points todsacerdoti | 1 comments | 03 Sep 25 11:27 UTC | HN request time: 0.343s | source
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FrostKiwi ◴[06 Sep 25 07:01 UTC] No.45147221[source]▶
Author here, Thank you very much for linking! Masaki Kawase is a bit of a graphics programming idol of mine. Living in Japan, I got to interview him on a zoom call about what it was like being a graphics programmer in those adventurous times 1999~2005 of the Japanese video game scene.

This kick-started by desire to write about the Dual-Kawase Blur, a technique I stumbled upon when ricing my linux distro.

replies(3): >>45151485 #>>45152051 #>>45155391 #
1. Const-me ◴[06 Sep 25 19:11 UTC] No.45152051[source]▶
Good article, but it uses less than ideal formula for weights of the gaussian blur kernel.

Gaussian function for coefficients is fine for large sigmas, but for small blur radius you better integrate properly. Luckily, C++ standard library has std::erf function you gonna need for the proper formula. Here’s more info: https://bartwronski.com/2021/10/31/practical-gaussian-filter...