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Use a free third-party Java tool to truly compress PDFs
Authored by: wrk3 on Jan 15, '10 08:38:27AM

This hint didn't really mention what was to be compressed (text data or graphic file data). I've been saving paper receipts to PDFs using only Image Capture, Preview and ColorSync, getting both high compression and good quality in the resulting PDF files. The key was to create a new filter in ColorSync.

Open the ColorSync Utility, click the Filters menu button and then the plus symbol at the bottom to create a new filter. Name the filter, then click the reveal triangle on the right side to bring up a menu. Choose "Add Image Effects Component," then "Image Compression." This will add a new drop-down titled "Mode:" set to Automatic. Change "Automatic" to "JPEG" and set the quality to whatever you want. I have it set to minimum. Although you might think it would devastate text images, I find the images perfectly readable at 100% magnification (and I'm talking about poor-quality text; a la grocery store checkout receipts).

Once done, close ColorSync and import a text image into Preview, then choose File -> Save As. In the Save As dialog, change the Format drop-down to PDF and change the Quartz Filter drop-down to whatever you named your new filter. The saved file will be reduced by whatever you set the JPEG compression to, with very good image quality. And no need to install anything.

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Use a free third-party Java tool to truly compress PDFs
Authored by: chuang on Jan 21, '10 06:58:33AM

Tried your suggestion. JPG was 522 Kb and reduced to 36Kb and the quality looks as good if not better. Well impressed and thank you for a great tip!


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