Questions tagged [graphicsmagick]

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How can I with Linux easily create a collage of passport photos?

I can easily crop a photo to the right dimensions or use an online tool, but I need to make it into a 4x6 because CVS charges $0.25 for a 4'' x 6'' but they charge $12.99 with a coupon for a 2'' x 2''....
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animated gif speed, nice in ImageMagick or GraphicsMagic, slow in powerpoint

I have N tiff files. In linux I can do convert -delay 0 -loop 0 *.tiff output.gif In linux, using gm animate *.tif I get a nice smooth rotation at a nice speed. And if I recreate N tiff files to ...
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inlay or composite image into corner of larger image, GraphicsMagic or ImageMagick

(A) I have a rotation of a part so I have 360 tiff files, which I can animate in ImageMagick and also export to an animated gif. This image is 1920x1080, with a black background, there are 360 of ...
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Does GraphicsMagick have inline image crop?

ImageMagick has got Inline Image Crop. Is this also available in GraphicsMagick? E.g., how can I make the following work? > gm montage -tile 2x1 logo:[20x20+50+50] logo: out.gif
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Graphicsmagick: combing multiple images are splitting to next line after 1536px

Using GraphicsMagick I have tried something like this gm montage -geometry 256x256 6-0-0.jpg 6-1-0.jpg 6-2-0.jpg 6-3-0.jpg 6-4-0.jpg 6-5-0.jpg 6-6-0.jpg 6-7-0.jpg final.jpg Its creating final.jpg of ...
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What colors does Graphicsmagik support?

I'm using Graphicsmagik from the command-line and I want to specify RGB values. (How) can I do this? What colors / color formats does Graphicsmagik support?
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How do I make weighed average (using alhpa channel as weight) of pictures?

I have multiple similar pictures I want to make aveage of, but not uniformatically. Each zone in pictures should have separate weight, and the weight is encoded in alhpa channel (fully transparent - ...
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How to display a picture and print pixel coordinates when I click?

When using ImageMagick or similar command line tools it can be useful to know coordinates of some points in the image. How to display an image (with panning and zooming) and print coordinates of ...
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12 votes
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How to auto-trim scanned images using imagemagick or graphicsmagick?

I've got some scanned images in *.jpg format. They are scanned using A4 scanner, in greyscale or colour. Scanned pages have very different dimensions - some A5, some A6, some business cards etc. ...
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transparent gradients with graphicsmagick

I'm trying to create a gradient that goes from transparent to some color. With imageMagick you can do that with (taken from the documentation): convert -size 100x100 gradient:none-firebrick ...
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Is there a GraphicsMagick equivalent to ImageMagick's image stack?

Although GraphicsMagick is a fork of ImageMagick, there are dissimilarities between the two, namely in the support of image stacking in ImageMagick, but not in GraphicsMagick. Taken from the ...
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How to create a transparent image with GraphicsMagick CLI?

I'm coming up empty handed while trying to find out how to modify the opacity of an image using the GraphicsMagick CLI. I'm simply trying to input a standard image and convert it to the corresponding ...
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9 votes
3 answers
13k views

How do I change the canvas size of a PNG with ImageMagick (GraphicsMagick)? (How to pad with transparency?)

Alternatively: How do I take a non-square PNG and "fill out" the "rest" of the image with transparency so that the resulting square image has the original image centered in the square? ULTIMATELY, ...
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Why does gm always export all layers of the input image?

Given the following command line: '/usr/bin/gm' convert 'directory/filename.psd[0]' filename.jpg I will always receive all layers from the .psd as output: $ ls something* something.jpg.0 something....
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