How do I join various images next to each other in OS X?

Question

I would like to join various PNG images horizontally in Mac, either using the console or Automator. Is this possible? How?

An example:

Given these two images:

The result would be:

The images have the same size but their size is not constrained. The number of images is between 2 and a few dozen.

Answer 1

You can use ImageMagick's append to combine multiple images together. +append for horizontal, -append for vertical.

convert mrdUM.png 477kv.png +append appended.png

convert mrdUM.png 477kv.png -append vertical.png

Reference

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To install ImageMagick, I suggest either using MacPorts or Homebrew. After installing either one, it's as simple as

port install imagemagick

brew install imagemagick