White Papers

Efficient Histogram Generation Using Scattering on GPUs

Overview This paper presents an efficient algorithm to compute image histograms entirely on the GPU. Unlike previous implementations that use a gather approach, the paper takes advantage of scattering data through the vertex shader and of high-precision blending available on modern GPUs. This results in fewer operations executed per pixel and speeds up the computation. The approach allows one to create histograms with arbitrary numbers of buckets in a single rendering pass, and avoids the need for any communication from the GPU back to the CPU: The histogram stays in GPU memory and is immediately available for further processing. The paper discusses solutions to dealing with the challenges of implementing the algorithm on GPUs that have limited computational and storage precision.

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Publisher: Advanced Micro Devices (AMD)
File Format: PDF
Date Published: Feb 15, 2008
Format: White Papers
Topics: Software Engineering

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