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HeiniPotsdam
2 Posts |
 Posted - May 02 2018 : 10:37:20
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I have several JPEG files.
I want to store them in a database.
The size of the files is very different, from 0,5 MB to 8 MB.
I want to store the files with around 1 MB.
Reducing the quality over IO.Params.JPEG_Quality.
I tried loading the files and reducing the quality step by step until 1MB is reached. A slow way.
Anybody know a better way?
Best regards, Olaf |
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xequte
39053 Posts |
Posted - May 03 2018 : 16:55:19
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Hi Olaf
Arbitrary limits on JPEG image size are always problematic. Because of lossy compression, guessing the final size is like asking how much red paint will I need to paint a sunset 
If you must have the limit, then ensure you use a memory stream rather than saving to temp files, and use a halving process to narrow in on the optimal size. e.g. measure 60% and 80%. Assuming 60% is <1MB and 80% >1MB, then try 70%. Too small? Try 75%, etc.
Nigel
Xequte Software
www.imageen.com
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HeiniPotsdam
2 Posts |
Posted - May 03 2018 : 17:45:11
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Hi Nigel
Thank you
I've tried different file sizes now.
From this I have calculated an approximate straight line, but with a wide dispersion.
Now I get smaller files, which are often relatively close to 1 Mb.
That's enough for my purposes.
Best regards, Olaf |
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JPEG Quality to one MB
