Steve Simon wrote:
> This is why people use 14bit scanners running at 4096dpi and the like,
> only to downsample to 640x480x8bit. You will always get better results if
> you throw away resolution cleanly using well designed digital filter
> than to use a low-res scanner directly.
It's even more used in digital cameras, which most of them store to JPEG
directly. Therefore, the image file has a downsampled color space,
blocking effects, etc. The result is much better if you photo double the
resolution wanted, and then scale by software (even with a simple
scaling algorithm).