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Sometimes I compress a jpeg which I have downloaded from the Net.
I always use the same old version 3.1 of ACDSEE for compression mainly because it is simple and convenient although I do have Photoshop and Paint Shop Pro. However I tend not to use them for something which seems so straightforward.
As an example, I notice that (with the SAME settings for compression in Acdsee) some 500 KB jepgs will compress to 300 KB but other 500 KB jpegs will compress right down to a surprisingly small 100 KB.
What does the final size in KB compared to the original size tell me about the properties of original jpeg?
Or to put it another way, how is the degree of compression (given the same settings on Acdsee) linked to the original jpeg’s properties such as pixel size, print size, etc?
I always use the same old version 3.1 of ACDSEE for compression mainly because it is simple and convenient although I do have Photoshop and Paint Shop Pro. However I tend not to use them for something which seems so straightforward.
As an example, I notice that (with the SAME settings for compression in Acdsee) some 500 KB jepgs will compress to 300 KB but other 500 KB jpegs will compress right down to a surprisingly small 100 KB.
What does the final size in KB compared to the original size tell me about the properties of original jpeg?
Or to put it another way, how is the degree of compression (given the same settings on Acdsee) linked to the original jpeg’s properties such as pixel size, print size, etc?
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