I didn't understand how image pyramids can be used in image compression. Are we just saving a downscaled version of our original image, or is there more to it? Thanks!
motoole2
There's a little more to it. The Laplacian pyramid tends to be very sparse (lots of pixel values close to 0) and sparse structures are easy to compress. So if you want to perform image compression, one approach might be to (i) compute a Laplacian pyramid and (ii) store only the largest pixel values in the pyramid.
I didn't understand how image pyramids can be used in image compression. Are we just saving a downscaled version of our original image, or is there more to it? Thanks!
There's a little more to it. The Laplacian pyramid tends to be very sparse (lots of pixel values close to 0) and sparse structures are easy to compress. So if you want to perform image compression, one approach might be to (i) compute a Laplacian pyramid and (ii) store only the largest pixel values in the pyramid.