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Mike Chaney's Tech Corner > Mike's Software > Qimage > Web copies increasing file size
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Author Topic: Web copies increasing file size  (Read 7663 times)
Anthony
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« on: October 23, 2009, 09:56:56 AM »
A number of photos actually increase in size when I reduce the resolution. For example, a photo at 2592 x 1944 with a file size of 876 KB ends up with a file size of 1047 KB when reduced to 1024 x 768 (save quality 100). Why is this?

Many thanks - Anthony
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Terry-M
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« Reply #1 on: October 23, 2009, 10:07:29 AM »
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For example, a photo at 2592 x 1944 with a file size of 876 KB ends up with a file size of 1047 KB when reduced to 1024 x 768 (save quality 100). Why is this?
That is because the original file was created with a low jpeg "quality" setting. If it is one direct from camera, I suggest you look to see if there is a higher quality setting available on the camera.
Terry.
PS. re-saving at 100% does not improve the quality; re-saving jpeg's always degrades them.
« Last Edit: October 23, 2009, 10:09:14 AM by Terry-M » Logged
Fred A
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« Reply #2 on: October 23, 2009, 10:10:44 AM »
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number of photos actually increase in size when I reduce the resolution
The photos are not increasing in size, just the file size.
Set the compression quality lower, to 70 and the file size will shrink.
You didn't mention what format your 876 KB file was, before you downsized, but assuming it too was a JPG, the Quality setting of that JPG save might not have been as high and as good as what was used in the Qimage save at a setting of 100.
Fred
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Anthony
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« Reply #3 on: October 23, 2009, 10:12:42 AM »
I *think* the cameras are set to normal. I'll move them to fine. Appreciate your help, both you and Fred
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Fred A
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« Reply #4 on: October 23, 2009, 10:20:27 AM »
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I'll move them to fine.
I believe that most cameras will give higher ressolution JPGs when set to fine. So besides getting a larger file size, you should be getting a higher quality (higher resolution) image using fine.
Fred
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