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Hela Shamash
Hela Shamash
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JPEG file options

Apr 17, 2012 12:01 AM

Tags: #cs4 #jpeg #resolution #format"

How does saving a file as alow (vs high) format JPEG reduce the file size? I saved both as a test, opened in photoshop and looked at image size: the resolution and pixel dimensions are the same while the file size differs.

5595 Views   3 Replies   Latest reply: Rudy Chorvat, Jun 4, 2012 5:25 AM
 
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  • p_d_f
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    1. p_d_f,
    Apr 17, 2012 3:09 PM   in reply to Hela Shamash
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    Changing jpeg compression from high to low never affects the number of actual pixels in the image, but it does affect how highly compressed the file is when saved and how many visible artifacts you might see. The change is going to be in the size of the file saved to disk. Check out those numbers and that's where you'll see the difference.

     
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  • Hela Shamash
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    2. Hela Shamash,
    Apr 17, 2012 11:11 PM   in reply to p_d_f
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    Thank you

     
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  • Rudy Chorvat
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    3. Rudy Chorvat,
    Jun 4, 2012 5:25 AM   in reply to Hela Shamash
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    And it effect quality of final picture,....higher compression, lower quality,…jpg artifact and details breaking down.

    Best is edit image in Tiff, or PSD, and final edited version you can save on jpg,  lesser compression better.

     
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