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thomasbricker

Coloring Btmap tiffs in Affinity Designer

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On 8/6/2018 at 4:35 PM, Fixx said:

Well, either there is error in math or bigger 1-bit file just happen to compress better than downsampled one.

Here are some figures for file sizes when saving the same image in different bit depths, compressed and non-compressed:

filesizes.jpg.93f042b80ec0fa8707e1ff55dd99b3f0.jpg

Note however that the bitmap image has 1200dpi, which it normally also needs to have, while the grayscale and RGB versions have 300dpi. The content for all files was same, random line strokes in black.

These are lossless compressions for all file types (LZW for 8 and 24 bit and ZIP for 1-bit). You can use grayscale images for colorizing, too, but 1 bit images have some uses that other image types do not have. But there is necessarily no point in using them just for saving disk space.

 

 

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Yep! I shouldn't have gotten too excited! Affinity (Designer, Photo or Publisher) won't output to PMS only CMYK Come on Affinity! this is needed! now back to your original programme.

 

Addendum: you could still do it in a manual kind of way - as the color doesn't need to be specified in the file as long as the right bitmap image gets assigned the correct ink color and correctly registered it would work, but then that's taking the process back quite a few years! 

Thanks for listening...

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