Not Your Everyday Banana

by Bart Arondson

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5

The actual screen representation of a jpeg file (or any other graphic file) is different from the one which lies in the file. Because JPEG is a lossy compression, the JPEG cannot be converted BACK to the original bitmap (the one which was saved by camera and/or another program). It is converted to one (or more) new bitmap(s) which can be (and is) dependent ...


6

Yes. How else could it be displayed? The screen needs to show the actual pixels, not an abstracted mathematical representation of them. Perhaps more crucially, a JPEG needs to be converted to a bitmap to be edited, which is why re-saving an image in JPEG can cause artifacts and loss of detail even if you don't change anything.



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