Re: Lost Pixels
I think what was meant by lost pixels, was lost details. Jpeg compression can ruin
photos, just as compression of sound files can wreck music. However,
compression does NOT equal degradation. Obviously, you can compress text files
and greatly reduce their size, open them back up and all the words are still
there. It depends on the program how much information is chucked.
I used to always save my photos as PICT files. These are as large as tiff files.
However, I *believe* that if you save as a jpeg (.jpg) using the *maximum*
compression setting, you will not be able to detect any loss in quality. The
savings in file size may be considerable. This is what I do now. I would not
repeatedly save the same image as jpeg though, because each time some detail
*may* be thrown out.
Once detail is gone, it's never coming back. Blurred photos cannot be made
sharp, digital sharpening is one of the ugliest effects I have ever seen. FOr a
while, National Geographic was putting photos on the cover that were digitally
*over-sharpened* and they looked positively terrible, all gritty and nasty. A
slightly blurry photo would be better than *that*.
I find I can enlarge digital photos a little bit, maybe 50%. Try going up in small
steps, then blurring the image a little to remove weird artifacts. A lot has to do
with individual tolerance and the value of the image. We may tolerate lower
quality if the image has special importance. Sort of like listening to favorite old
records, you sort of tune out the noise.
If you care about quality, though, try to start with big files. Then can always be
downsized later. To restore or improve quality, you will have to learn to paint the