GPU Friendly Data Compression - GPU Technology Conference
GPU Friendly Data Compression - GPU Technology Conference
GPU Friendly Data Compression - GPU Technology Conference
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Custom <strong>Compression</strong>• The Tools:– Karhunen Loéve Transform (KLT), PCA of colorspace– PowerVR Texture <strong>Compression</strong> (PVRTC)– L 2 -optimal downsampling of lesser components, „chroma subsampling“• KLT:– Compute covariance of colors– Compute Eigenbasis R of covariance matrix– Forward: α β γ T ≔ R r b g T– Backward: r b g T ≔ R T α β γ TFenney, „Texture <strong>Compression</strong> using Low-Frequency Signal Modulation“, Graphics HW, 2003King Abdullah University of Science and <strong>Technology</strong>40
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