HDR( High Dynamic Range Rendering ) by HLSL

最新推荐文章于 2025-03-15 10:53:46 发布

DONALDO_O

最新推荐文章于 2025-03-15 10:53:46 发布

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本文链接：https://blog.youkuaiyun.com/donaldo_o/article/details/3244588

本文探讨了高动态范围(HDR)与低动态范围(LDR)技术的基本概念及其在计算机图形学中的应用。介绍了HDR环境下光线因素的表示方式，并解释了如何通过Tonemap技术将HDR场景适配到LDR设备上进行显示。

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LDR　Low Dynamic Range. All our CRT or LCD is LDR. In computer, each light factor( r, g, b, or a ) is stored in byte format, it’s range is from 0 to 256, which is a pretty low dynamic range. Human eye's range is about 10e3.

HDR　High Dynamic Range. The environment around us is typically HDR. In computer, each light factor( r, g, b, or a ) is stored in floating-point format, ranging from -10e5 to 10e5, which is a really high dynamic range.

Tone map　How can we use our LDR devices to display HDR scene? This "Tone map" technique perform a lighting adapting ( like our eyes )procedure to use the LDR screen to display the HDR scene.

Bloom　Bloom effect.