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Tips:5¢ Advice:Free
Join Date: Aug-2001
Location: Silicon Valley
Country: USA
Posts: 9,745
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Quote:
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Originally Posted by heymikey
One of the quirks of Irfanview that I have experienced is that when you take jpeg file (say 50 kb), open it with Irfanview and make a minor change and save, it will show as a much larger file (about 150 kb; too big to post). If you then reopen it in MS Paint, do nothing to it and resave it, it will return to about 50 kb. ... If the file is too large I compress it using Xatacom. All these programs were freeware (Paint came with XP) which goes to show you how cheap I am (and you can be also). You may be able to do more or things with Photoshop, but it's not required.
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That is a question of compression. Most programs will do just as Irfanview and save the file with zero compression. You need to make a selection of what jpeg quality (compression) to save the file at. Usually trees can take 20, 30% compression without any appreciable loss in quality. That makes the image maybe 1/4 to 1/10 as big as the uncompressed file.
Many people don't understand compression, so they save JPEGs with zero compression and wind up with huge files. In reality you only need that quality level if you are going to print high-resolution photos on paper.
Regards,
Matt
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