> No tricks like decoding a smaller image from a JPEG
Given that most cameras are producing JPEG now, I'm curious why you don't make use of the compressed / frequency-domain representation. To a novice in this area (read: me), It seems like a quick shortcut to an 8x or 4x or 2x downsample.
Or is the required iDCT operation just that much more expensive than the convolution approach?
Given that most cameras are producing JPEG now, I'm curious why you don't make use of the compressed / frequency-domain representation. To a novice in this area (read: me), It seems like a quick shortcut to an 8x or 4x or 2x downsample.
Or is the required iDCT operation just that much more expensive than the convolution approach?