I have an grayscale image 512 by 512 pixels = 262144bytes. I need to
encode this raw grayscale image into JPEG n find its PSNR at various
bpp. However, I do not quite get the definition of bits per pixel and
its relationship with quality factor.
how do i calculate the quality factor in the quantisation matrix that
is needed to achieve a 0.25 bits per pixel and 0.5 bits per pixel
output?
Re: JPG compression question ... I don't know the (pixel) size of files from your camera, but would guess them to be about 2000 x 3000 pixels, giving about 6 megapixels. ... Depending on whether your shots are landscape or portrait, you should resize them (use the highest quality algorithm your program offers) so they fit on the screen. ... Use the highest quality you can to get the file size you need to get to, after you've resized the pixel dimensions, per your intended use. ... However, be aware that in any case, you cannot significantly reduce a file size by only cutting jpg quality without resizing it smaller first. ... (rec.photo.digital.slr-systems)
Re: Why is the pixel count growing so slowly? ...sensor, due to noise issues. ... even today's pixel count is resulting in lower ...quality images than before. ... (rec.photo.digital)
Re: Fuzzy Still Pictures ...Quality Video ". ... of argument, assuming a change of pixel aspect ratio, would this not be done ... not shown any evidence of DV-AVI non-square pixel specification.... Al Stu - MVP... (microsoft.public.windowsxp.moviemaker)
Re: Which internet labs print at what dpi? ... The appropriate term should be image PPI but generally confused with DPI,...pixel dimension your image has that decide the quality.... (rec.photo.digital)
Re: Fuzzy Still Pictures ... test of the original theory would be to get the filter removed from DV-AVI ... > Video " is due to the blurring filter.... > However this does not disprove the existence of a quality degradation due ... > to non-square pixel adjustment.... ... (microsoft.public.windowsxp.moviemaker)
