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I would like to combine multiple images into one image using ImageMagick. To explain a little better, I want the result to look similar to this:

That is, I have a number of screenshots, and I want to turn them into one image with the original images on top of each other.

By Googling, I have come across the 'composite' command, but I don't know if, and in that case how to use it to get the result I want.

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Did you check out imagemagick multi image layer examples? –  timbooo May 30 '11 at 19:35

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up vote 95 down vote accepted

For any number of single input files named in-<something>.jpg:

convert -append in-*.jpg out.jpg

(in order to have specific files appended, or skip numbers instead of getting the full "glob", you can mention the input files explicitly and put the "append" command afterwards, i.e.: convert in-1.jpg in-5.jpg in-N.jpg +append out-in1-plus-in5-and-inN.jpg -- or "-append" for vertical paste-up)


montage -mode concatenate -tile 1x in-*.jpg out.jpg

will both create a file out.jpg that contains a vertical concatenation of the source images.


For simple concatenation in a single row or column, the append option of the convert tool is sufficient. Note that -append concatenates all images vertically, creating one column with n rows and +append concatenates horizontally, creating one row with n columns.

(See ImageMagick: Command-line Options.)


To get finer control over the layout, we would need the montage tool. montage -mode concatenate will glue the input images together like the append option and -tile 1x controls the layout to be applied.

tile follows the format <columns>x<rows>, but either side may be missing and montage will figure out how to meet the constraints.

We're using 1x (exactly one column with any number of rows) here to get the same effect as -append. Without -tile 1x, it would join the images like +append, defaulting to -tile x1 (any number of columns on one row).

(See ImageMagick Examples: Montage, Arrays of Images.)

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Thanks, exactly what I was looking for! –  Izbitzer May 31 '11 at 12:44
Thanks. append works fine, but I consider montage broken: if ghostscript fonts are not installed, it will bail out, EVEN if you are not annotating the images. Fonts should be loaded on demand, not in advance. –  Bram Jan 5 '14 at 19:26
@Bram: I didn't know that and strongly agree. Do you know if GraphicsMagick behaves the same? –  user112553 Jan 6 '14 at 4:00
How would I skip every other image? I'd like to parse a subset - in-1, in-3, in-5, etc.. –  Mike Robinson Jul 24 '14 at 17:57
@MikeRobinson convert -append `counter=0; for x in in-*; do if [[ $(($counter % 2)) == 0 ]]; then echo $x; fi; counter=$((counter + 1)); done` out.jpg should do the job. –  gozzilli Nov 12 '14 at 15:59

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