Legacy ImageMagick Discussions Archive

I looked for the tags for latest release that matches the respective binaries v6 and v7

6.9.9-20 and 7.0.7-8

using git tag -l and they are not to found.

How do a get the code that macths the binaries 6.9.9-20 and 7.0.7-8?

Where are you reading your quote about linear grayscale. Here https://legacy.imagemagick.org/script/color-management.php its also on the page for latest version IM here https://imagemagick.org/script/color-management.php Normally, the conversion to separate each channel of an sRGB color image produ...

Thanks for your help, I studied your post, and I went thoroughly through the examples here https://legacy.imagemagick.org/script/color-management.php I thought I had it all figured out, but some of the examples don't work as expected, is this a bug with my version of IM?, I am using ImageMagick 6.8....

Actually I think there is more to it. -seperate seems to do the same thing. convert logo: -channel b -separate -colorspace RGB logo.tif convert logo.gif -rotate 90 -colorspace RGB linear_in_lin_out.tif convert logo.tif -set colorspace RGB -channel b -separate -rotate 90 -colorspace RGB not_what_you_...

Thanks combine is a real Gotcha! I spent hours trying to figure out a behaviour that just wouldn't make any sense. Until I pined it down to something to do with -sepearate, -clone, -combine. convert logo: -colorspace RGB logo.tif convert logo.tif -rotate 90 logo_rot_1.tif convert logo.tif -set color...

Thanks, If you start with true linear data and want to keep it linear, you should tell IM that it is linear via -set colorspace RGB, so convert image.tif -set colorspace RGB <processing> output.tif This is what I thought too: which is why I thought convert image.tif -set colorspace RGB <processing> ...

Will have to think about that a bit more, but I thought the fact that ifa tiff reports sRGB it didn't actually mean it was encoded non-linear. i.e. what's to stop a program writing an image stored in memory as linear straight to the tiff file without any gamma encoding. This is what I thought the tw...

Look at identify -verbose yourimage and see what gamma you have after conversion. If gamma=1, it is linear. If gamma=0.4545, it is non-linear. Thanks that's most helpfull, except I am not sure my input which I thought was linear is actually linear, as it reports gamma=0.4545 Also I tried the follow...

I am working with liner RGB tiffs, with ImageMagick 6.8.9-9 Q16, I am trying to get my head around how IM works. My conversions follow 1 or 2 scenarios 1. linear RGB input, output should remain linear RGB for example: convert infile.tif -set colorspace RGB -rotate 90 outfile.tif I understand -set co...

Am I correct, that both Negative2Postive and neg2pos, expect a gamma encoded scan i.e. sRGB as opposed to linear RGB?

Take a look at my unix bash shell scripts, neg2pos and negative2positive, at my link below. Thanks I did take a look at those, but my understanding of how both those scripts work, is they use the -negate to invert the image, before attempting to make a colour correction, am I correct on that point?...

I have a good understanding of conventional photographic processes, can print color neg, B&W with reasonable skill etc, some limited math (should have paid attention more in class), and some basic understanding of the digital scanning processes. I am attempting to use imagemagick with some addit...

fmw42 wrote: ↑2017-10-13T17:05:54-07:00 If you post your versions to Git Hub, then you need to include a page about my licensing terms.

Thanks for the reminder will contact you when I get to that stage, to ensure that I do that correctly.

Thanks for all the help! I ran a final multicrop on the single strips to create the separate frames, and that works well. I need to test it a bit more and improve my own scripts that drive the process. I can think of useful enhancement to the multicrop, to do with the -b and -c options, but I have n...

Thanks that amazing! It worked with original multicrop.

what is the difference between multicrop2 and the original? I am running imagemagick 6.8.9-9 so I will need to upgrade to use multicrop2.