Good explanation. I'm learning...day by day... keith
mike wilson wrote: > > Hi, > > Keith Whaley wrote: > > > > Okay, but... > > A saved size of 17.3 MB sounds like it didn't save in .jpg but RAW! > > Does Photoshop do something to an imported image that would account for > > that massive increase in file size? > > The poster said the file size of each downloaded and saved image file, I > > assume on his computer, was between 1.9 and 3.02 megs. That sounds about > > right for an as-recorded jpeg image, doesn't it? One saved with > > absolutely minimal compression? Or, is there such a thing with jpegs? > > Saved with essentially no compression? > > Time for another 101, I think. > > The only analogy for JPEGS I can come up with is those balloons with > words printed on them. When it's inflated, you can read the words. > When it's deflated, you can't and the balloon is much smaller. That's > what JPEG image files are like. When you save them, they are the > deflated balloon. Imaging software (all types) reinflates the balloon > so that you can see it properly. Good imaging software doesn't lose any > of the words on the balloon, although if you inflate and deflate (view > and _save_ - that is where the analogy falls down) many times the words > start to crack off and become crinkly. > > So a JPEG will be smaller when it is a saved file that when it is > expended into the viewing software. The 17.3Mb is not the saved size, > it is the size the software "inflated" it to. > > Other types of files are like balloons that you can only blow up once. > When they are inflated, that's it - they stay that size. > > mike
