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Old Jul 14, 2012, 5:30 PM   #1
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Default why is image size reduced

when i download a photo it is the same size as in the camera but after editing the file size is reduced. is that normal? i use microsoft digital image suite
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Old Jul 14, 2012, 5:44 PM   #2
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File size with JPEG files is dependent on image content. The more detail and color combinations in an image the larger the file size for a given JPEG quality setting.

Check the JPEG Quality setting in the image editor you're using. The higher the JPEG Quality setting, the lower the [lossy] compression, and the larger the file size.

The lower the JPEG quality setting (meaning more compression, which is lossy when dealing with JPEG images), the smaller the file size.

You'll find settings for JPEG quality somewhere with most editors (either under Preferences, or via a pop up box with a Quality Slider when you use the File>Save As menu choice). Set it to something higher for less compression, meaning higher quality files with larger file sizes. Usually, around 8 on a 1 to 10 scale, or around 80% on a 0 to 100% scale is a good compromise between quality and file size with most image editors. Any quality setting higher than that may result in larger file sizes, but for web posting at typical sizes, the human eye probably can't tell the difference.

But, again, image content also impacts file size. For example, if you're doing something like increasing Contrast to give you a more "punchy" image, you'll probably see smaller file sizes for a given JPEG quality setting, because that kind of setting destroys real detail (making brighter areas brighter, and darker areas darker, where you don't see a lot of the finer "nuances" with image content).

Ditto for some of the other settings that users sometimes think is improving image quality, when they're just destroying real detail. For example, if you increase sharpness settings, that's just increasing contrast at edge transitions and tends to destroy real detail in an image. So, go easy on the sliders for things like contrast and sharpness if you don't want to lose real detail in your images.

But, chances are, the JPEG quality setting with your image editor is what's making the most difference (quality slider set too low somewhere, so you end up with lower quality images with more compression and smaller file sizes).
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Old Jul 15, 2012, 5:53 AM   #3
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i found out how to increase file size but does that change the quality of the photo when printed or does it just take up more space on the computer?
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Old Jul 15, 2012, 1:36 PM   #4
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You may not see any loss of print quality if you are printing 4"x6", but if you want larger sizes, the difference is more likely to show up. Storage is now so inexpensive, that even I don't worry very much about it, and generally save photos at the best quality in original size.

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Old Jul 15, 2012, 2:23 PM   #5
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thanks for the help.that is what i like about this forum
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