Find out how to Create a Diff of Two Photographs

Once I was a toddler, I liked in search of Waldo within the “The place’s Waldo?” e-book sequence. As of late I am a sucker for TMZ’s “What is the Huge Frigin Distinction” photographs, the place TMZ barely adjustments a picture and you must spot the variations between the 2. That bought me to pondering — how simply might I automate diff’ing two photographs? This StackOverflow submit was gold.

To create a diff of two related 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 dimensions of the sun shades is clearly offered, and in the event you look intently, you’ll be able to see one cranium on the top-right of the shirt has been flipped.

No matter your purpose for desirous to determine the distinction two photographs, ImageMagick’s convert instrument is spectacular. You may do 1,000,000 issues with ImageMagick; take a look at my Media tutorials to study extra superior methods to change photographs, movies, and audio!