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#1
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Image re-size software
I've been asked to supply photos in jpg format not only at a specific size,
320x320, but a max 25K. A random sample of photos re-sized with quality level 95 come out anywhere from 20K up to 60K. Even reducing the quality level to 50, some still come out at 30K. Does anyone know if there's any software that would let me set the max file size and work out the best way to reduce the photo? Or any other advice to keep within the 25K limit? Typical properties of the original photos are 1024x685 (which would reduce to the relevant 320x??? figure), 96dpi h&v, bit depth 24. Brian. |
#2
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Image re-size software
On Tue, 05 Feb 2008 19:23:10 GMT, "Brian" wrote
in : I've been asked to supply photos in jpg format not only at a specific size, 320x320, but a max 25K. A random sample of photos re-sized with quality level 95 come out anywhere from 20K up to 60K. Even reducing the quality level to 50, some still come out at 30K. Does anyone know if there's any software that would let me set the max file size and work out the best way to reduce the photo? Or any other advice to keep within the 25K limit? Typical properties of the original photos are 1024x685 (which would reduce to the relevant 320x??? figure), 96dpi h&v, bit depth 24. Check out (free) ImageMagick http://www.imagemagick.org/ -- it has a wealth of options for image conversion. You could run different passes at different quality levels to check file sizes. Or you could write a PerlMagick script to automate the process of tweaking quality to get as close as possible to 25K. -- Best regards, John Navas Panasonic DMC-FZ8 (and several others) |
#3
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Image re-size software
On Tue, 05 Feb 2008 19:23:10 GMT, Brian wrote:
I've been asked to supply photos in jpg format not only at a specific size, 320x320, but a max 25K. A random sample of photos re-sized with quality level 95 come out anywhere from 20K up to 60K. Even reducing the quality level to 50, some still come out at 30K. Does anyone know if there's any software that would let me set the max file size and work out the best way to reduce the photo? Or any other advice to keep within the 25K limit? Typical properties of the original photos are 1024x685 (which would reduce to the relevant 320x??? figure), 96dpi h&v, bit depth 24. Brian. JpegSizer lets you specify the pixel dimensions AND the file size. It figures out automatically how much JPEG compression is needed to achieve your file size. Details he http://tinyurl.com/2jj7q2 Hope this helps. Pete |
#4
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Image re-size software
"Pete" wrote in message ... On Tue, 05 Feb 2008 19:23:10 GMT, Brian wrote: I've been asked to supply photos in jpg format not only at a specific size, 320x320, but a max 25K. A random sample of photos re-sized with quality level 95 come out anywhere from 20K up to 60K. Even reducing the quality level to 50, some still come out at 30K. Does anyone know if there's any software that would let me set the max file size and work out the best way to reduce the photo? Or any other advice to keep within the 25K limit? Typical properties of the original photos are 1024x685 (which would reduce to the relevant 320x??? figure), 96dpi h&v, bit depth 24. Brian. JpegSizer lets you specify the pixel dimensions AND the file size. It figures out automatically how much JPEG compression is needed to achieve your file size. Details he http://tinyurl.com/2jj7q2 Hope this helps. Pete Thanks, looks interesting and certainly does the job. Brian. |
#5
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Image re-size software
Also, be sure that when you run the photos through resizing,
you aren't saving EXIF or other extraneous data that increases the output file size. Some conversion programs do that by default if you don't tell them not to. |
#6
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Image re-size software
Alan Meyer wrote in news:943f3191-6b6f-49f0-a6c4-
: Also, be sure that when you run the photos through resizing, you aren't saving EXIF or other extraneous data that increases the output file size. Some conversion programs do that by default if you don't tell them not to. Google "Remove EXIF" - there are several solutions. ~Ray |
#7
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Image re-size software
"Ray Paseur" wrote in message ... Alan Meyer wrote in news:943f3191-6b6f-49f0-a6c4- : Also, be sure that when you run the photos through resizing, you aren't saving EXIF or other extraneous data that increases the output file size. Some conversion programs do that by default if you don't tell them not to. Google "Remove EXIF" - there are several solutions. ~Ray I've tried jpegsizer and it seems to do what I want, including removing the exif data. If I decide to take it beyond the trial version it would appear capable of producing several formats in one pass - the site I'm providing them for does nothing itself and needs up to 7 different sizes depending what article they're being used for :-( Brian. |
#8
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Image re-size software
Brian wrote:
I've been asked to supply photos in jpg format not only at a specific size, 320x320, but a max 25K. A random sample of photos re-sized with quality level 95 come out anywhere from 20K up to 60K. Even reducing the quality level to 50, some still come out at 30K. Does anyone know if there's any software that would let me set the max file size and work out the best way to reduce the photo? Or any other advice to keep within the 25K limit? I guess the only way to do that is to write a script that steps through the different compression levels (from highest to lowest) until the desired file size is reached. You can use ImageMagick for the image processing, and any decent scripting language should do. -- Free computer wallpapers http://www.art.eonworks.com/free/wal...wallpaper.html |
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