ianp69641526
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ianp69641526
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‎Sep 18, 2018
04:32 PM
Thank you all so much for your help (and sorry for the late reply). I will probably opt for downsampling all color images to 300 dpi during export and then replace some of the downsampled files in the PDF file with Acrobat with higher quality ones with zip compression (since these will only be a few). @rob day: I might also look into your solution that involves multiple bitmap files with different color overlays. Thanks!
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‎Sep 13, 2018
05:42 PM
Thank you both so much for your explanations. I now understand that my problem is defining the correct compression and downsampling values in the export options. When I chose downsampling to 300 dpi for color Images, this will include any 3 or 4 color images. Disabling downsampling, I get solid colors. Now, I want to define that certain images (photographs) are downsampled to 300 dpi with JPG compression, while color line drawings must be downsampled to 1200 dpi with ZIP compression, strictly maintaining the defined colors. Is there a way to do this in InDesign? Again, thank you so much for your help!
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‎Sep 13, 2018
04:10 PM
Dear all, I'm exporting an ID project to PDF. I want b/w bitmaps to have a resolution of 1200 dpi and RGB images with 300 dpi. So far no problem. However, I also use images with 3 or 4 colors and I want those to maintain their format with a target resolution of 1200 dpi (especially because of the superior quality/file size ratio with lossless compression). InDesign only offers me color management for bitmap, gray scale and RGB images, but not for indexed colors. Is there a way to have indexed colors in the exported PDF? Thanks a lot. (For those who wonder: I intend to distribute HQ graphics principally as a PDF file, which is why I'm concerned about both ! file size and image quality. I see no need for 3-color images to be converted to full RGB; photos, however, are just fine with a standard JPG compression. The 3-color images are mainly line drawings with a red line here or an orange dot there. Unfortunately, I don't have them as vector graphics and don't want to redraw.)
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