A PCA basis decomposition of point spread functions allows a spatially variable PSF convolution to be approximated by K full-image convolutions plus pixel-wise weighted sums.
L., Berdja, A., Guzm´ an, C
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An Ultra-Fast Image Simulation Technique with Spatially Variable Point Spread Functions
A PCA basis decomposition of point spread functions allows a spatially variable PSF convolution to be approximated by K full-image convolutions plus pixel-wise weighted sums.