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
