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Thread: image size so much smaller after editing?

  1. #1
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    Default image size so much smaller after editing?

    I had edited an original jpg file 5.61mb without cropping, just change the brightness.
    when I saved the image, it became 1.58mb.
    Image was saved as 8 high quality jpg.
    why such a big loss in size?
    thanks

  2. #2
    Senior Member ricleo's Avatar
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    Default Re: image size so much smaller after editing?

    compression in the JPEG.. i wld normally save with a minimum of quality 10 for JPEG haaha...but that's still compression too
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  3. #3
    Deregistered allenleonhart's Avatar
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    Default Re: image size so much smaller after editing?

    Quote Originally Posted by ricleo View Post
    compression in the JPEG.. i wld normally save with a minimum of quality 10 for JPEG haaha...but that's still compression too
    i save as 12. baseline optimized

  4. #4
    Moderator catchlights's Avatar
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    Default Re: image size so much smaller after editing?

    compression as in discard data, higer the compression more data is discarded.
    and if your image has very simple background, or not having lot of details, physical file size will be smaller, eg, a glass of water against plain color background vs night cityscape of Orchard Road.
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  5. #5

    Default Re: image size so much smaller after editing?

    yeah the file size diff betw 8 and 10, and 10 and 12, are not all that proportionate...
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    Default Re: image size so much smaller after editing?

    i normally shoot incamera highest jpg quality.
    looks like cannot edit if need big file for printing
    if i shoot in raw and convert to jpg, will it be just as small?

  7. #7
    Senior Member giantcanopy's Avatar
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    Default Re: image size so much smaller after editing?

    Your brightening might have caused less details needed to be recorded, and the jpg compression is lossy.

    But still quite a drop i must say

    ryan

  8. #8

    Default Re: image size so much smaller after editing?

    Quote Originally Posted by CompactRod View Post
    i normally shoot incamera highest jpg quality.
    looks like cannot edit if need big file for printing
    if i shoot in raw and convert to jpg, will it be just as small?
    you should start shooting raw than jpg. Raw file give you more details for post processing. Upon converting to the highest quality jpg the file size will be reduced by 50% or so. File size is relative to the info (color, bit depth, saturation), dimension and resolution of the image.

  9. #9

    Default Re: image size so much smaller after editing?

    Photoshop Quality=8 drops a lot of information already.

  10. #10
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    Default Re: image size so much smaller after editing?

    even if we shoot at 21mp RAW after conversion to Jpg only get 50% left
    any solution to capture 21mp and print in its full glory

  11. #11

    Default Re: image size so much smaller after editing?

    Quote Originally Posted by CompactRod View Post
    even if we shoot at 21mp RAW after conversion to Jpg only get 50% left
    any solution to capture 21mp and print in its full glory
    save as tiff or psd file - it will be bigger than 21MB after all the post processing.

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