pdf file, 3 MB - Luiz Velho - IMPA
pdf file, 3 MB - Luiz Velho - IMPA
pdf file, 3 MB - Luiz Velho - IMPA
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Features detection<br />
• Detect keypoints for each image using Lowe’s SIFT<br />
• To try to speed up this step, used Wu’ SiftGPU<br />
– Implementation of SIFT for GPU<br />
– GPU shaders used in Gaussian pyramid construction, DoG<br />
keypoint detection and descriptor generation<br />
– Processes pixels and features paralelly in GPU and builds<br />
compact feature list by using GPU reduction: per-pixel<br />
processing changed to per-feature processing – reduces<br />
readback time<br />
27/11/2008 Fundamentals and Trends in Image Processing – <strong>IMPA</strong><br />
cpalomo@inf.puc-rio.br<br />
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