3 ms·
I thought the image transform was conceptually done on a grid of infinitely-repeating copies of the image in the spatial domain?
by caf 2y ago
I thought the image transform was conceptually done on a grid of infinitely-repeating copies of the image in the spatial domain?
- astrange 2y agoYes, or by extending the pixels on the edge out forever. The question is which one is more effective for compression; it turns out doing that for individual blocks rather than the entire image is better. (With mirroring things could happen like the left edge of the image leaking into the right, and that'd be weird.)