Easy methods to Create a Diff of Two Pictures


Once I was a toddler, I beloved on the lookout for Waldo within the “The place’s Waldo?” ebook sequence. Lately I am a sucker for TMZ’s “What is the Large Frigin Distinction” photographs, the place TMZ barely adjustments a picture and it’s a must to spot the variations between the 2. That obtained me to pondering — how simply might I automate diff’ing two photographs? This StackOverflow publish was gold.

To create a diff of two comparable photographs, we’ll use ImageMagick’s convert command line utility with a big host of configurations:

convert '(' image1.png -flatten -grayscale Rec709Luminance ')' 
        '(' image2.png -flatten -grayscale Rec709Luminance ')' 
        '(' -clone 0-1 -compose darken -composite ')' 
        -channel RGB -combine diff.png

How efficient is that this command with its configuration arguments? Let’s take a look:

Unique Picture

Modified Picture

Diff’ed Picture

The diff picture result’s fairly informative! The scale of the sun shades is clearly offered, and when you look intently, you possibly can see one cranium on the top-right of the shirt has been flipped.

No matter your purpose for desirous to establish the distinction two photographs, ImageMagick’s convert instrument is spectacular. You’ll be able to do one million issues with ImageMagick; take a look at my Media tutorials to study extra superior methods to switch photographs, movies, and audio!

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