shaderのブックマーク - はてなブックマーク

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

Techno logy, programming, art, machine learning, image and signal processing 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 or voxels. I’ll start with the very basics – what do we typical

shader 2021/03/01

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Small float formats – R11G11B10F precision

We can immediately see few interesting observations: 11 and 10 floats do not have sign bit! This decision was probably driven by the fact that they have already quite poor precision for most of uses, so they were designed in graphic APIs only to store color; using a sign bit here would be an extra waste. 16 bit “half” floats and 11 and 10bit floats all have same exponent! This is pretty interestin

shader 2018/02/13

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Cull that cone! Improved cone/spotlight visibility tests for tiled and clustered lighting

shader 2017/04/14

TiledとかClustered Renderingのスポットライトのカリングによさそうな話

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Localized tonemapping – is global exposure and global tonemapping operator enough for video games?

Techno logy, programming, art, machine learning, image and signal processing In this blog post, I wanted to address something that I was thinking about for many years – since starting working on rendering in video games and with HDR workflows and having experience with various photographic techniques. For the title of the article, I can immediately give you an answer – “it depends on the content”,