Legacy ImageMagick Discussions Archive

Although >2yrs after the initial post, I should report that the color-matrix solution (through XYZ space) yields the correct results. The following command works: magick in.tif -colorspace xyz -color-matrix \ "1.0478112 0.0228866 -0.0501270 0.0295424 0.9904844 -0.0170491 -0.0092345 0.0150436 0 ...

That's awesome. Thanks for doing the work!

Magick.NET version 7.0.7.700-Q16-x64 I'm distorting an image with MagickImage.Distort(ImageMagick.DistortMethod, double[]) which is working fine, except I can't work out how to apply distort "options" like the following CLI versions: -set distort:viewport=WxH+X+Y or -set distort:scale=value What am ...

...that would explain a lot! Thanks for your quick reply.

Magick.NET version 7.0.7.700-Q16-x64 I'm trying to draw a polygon on my image. Apparently this needs a list of coordinates. I've found this code online: List<Coordinate> coordinates = new List<Coordinate>(); coordinates.Add(new Coordinate(0, 0)); coordinates.Add(new Coordinate(500, 100 ...

Thanks for your reply! nb the last part of my post: This example works with a jpeg made like this: convert -size 3648x5472 xc:red input.jpg Thanks for your advice on making the image black. I got the idea from the ImageMagick Usage page: http://www.imagemagick.org/Usage/canvas/#other The advice ...

I'm running Version: ImageMagick 7.0.7-8 Q16 x64 2017-10-14 in Powershell 5.1.15063.674 on Windows 10 64-bit I've noticed strange behaviour when using -extent which I have worked-around using -define distort:viewport. This is the line I use which produces an unwanted result: convert input.jpg ...

Thanks for your reply! This TIFF file demonstrates the behaviour: https://www.dropbox.com/s/48ia9nquplfpa2k/0B8A5519.tif?dl=0 I'm using -gamma -1 because http://www.imagemagick.org/Usage/canvas/#color_misc suggested it (it's really fast). Neither of your lines works as intended for me, but adding ...

I have used the -composite option with 3 images to make a Masked Alpha Composition in the past like so: convert img1.tif img2.tif mask.tif -composite output.tif But when I draw the mask rather than feed Imagemagick an image, this doesn't give expected results: convert input.tif \( -clone 0 ...

Can't believe I overlooked that! Thanks, that's 1.5x faster on my machine

You could use exiftool rather than Imagemagick for this. Just grep 'Photometric Interpretation' and you'll find the info. This is faster than identify -verbose by 7.7x on my PC.

This may be of use to you: http://www.imagemagick.org/Usage/windows/#conversion

Thanks GeeMack - I hadn't checked the rest of the code. Do note that -composite can take three images if the third is a mask.

convert a.png b.png c.png d.png e.png \ \( -clone 0,1 -composite -gravity center -channel RGB -evaluate multiply 0.9 \) \ \( -clone 2,3 -composite -gravity center -channel RGB -evaluate multiply 0.9 \) \ \( -clone 5,6,4 -composite -gravity center \) \ -delete 0-6 output.png Should work. I haven't ...

You can load all inputs at the begining like this: convert a.png b.png c.png d.png e.png From now on, these have index numbers 0,1,2,3 respectively. When you want to work on them in parentheses you need to clone the indexes you want to work on. Like this: convert a.png b.png c.png d.png e.png ...