Legacy ImageMagick Discussions Archive

[Disclaimer (!): this post overlaps with my previous one at http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=21855 but things have moved on a little since then] IN SUMMARY I'm helping a friend of mine with some photographs of sheet music and I'm hoping you can help me ! I'd like a ...

I have a lot of JPG images created by photographing sheet music on a point and shoot camera. I've managed to clean them up quite a bit by converting them to PNG8, making them greyscale and doing a -contrast-stretch . The musical notes etc are now looking OK but the paper remains a bit 'grey' looking ...

Thanks to you both. I ended us using the fmw42 option but thank you snigbo for your suggestion, much appreciated.

regards

Richard.

I'm sure this is the simplest question asked in a long time but I can't see how to do it. I have an image in which all pixels which are currently, say, RGB(10,10,10) I want changed to RGB(20,20,20). I've looked at -clut but that seems very complex for the problem involved. To be specific the ...

Hi fmw42 - Thanks very much for your reply, I appreciate it. The second of your two options works beautifully. I just adjusted it slightly as I'm working on a 16bit version of IM (installed in rather a piecemeal way on Windows Vista) and I've found in the past that without -depth 8 the output of ...

I just want to clarify something about this question. When I say I'd like to produce two images - one which contains only the line on the axes/labels and one which contains everything else. I really mean I want one image which contains everything in the original image that is rgb(0,0,0) and one ...

Hi - I've got an TIF which contains a line graph. The axes/labels etc are all RGB(0,0,0) the line on the graph is rgb(143,174,214). Everything else is white. I'd like to produce two images - one which contains only the line on the axes/labels and one which contains everything else. I've done this ...

Hi - I'm using : convert.exe f1.tiff +profile icc -profile AdobeRGB1998.icc -profile USWebCoatedSWOP.icc -strip f2.tiff to convert the colour management of an image f1.tiff from RGB to CMYK and it works fine. What I'd like to do as well is to ensure that all the rgb(0,0,0) in the input image become ...

Just answering my own post here for the sake of future readers. It turns out that in using the 16 bit ImageMagick I was ending up with 16-bit/channel which the Python Image Library didn't like. I was able to force the output to 8 bit using the -depth 8 argument. I didn't work this out myself it ...

Just realised that I should have included the output from 'identify' for these two files so here it is First after the initial CMYK conversion : E:\bin\installed\ImageMagick-6.3.4-0-Q16>identify.exe -verbose H:\Shea\CMYKExperiment\ZENDGraphOutput-Step1.TIF Image: H:\Shea\CMYKExperiment ...

Hi - I have a RGB TIF which I want to convert to use CMYK. Everything appears to work well but the Python Imaging Library (PIL) chokes on the output. Before I dig too far into PIL I'd like to be sure I'm doing the right thing when making the conversion from an ImageMagick point of view. I do two ...