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What is the best duplicate image finder for Windows 11?
The free space on my Windows 11 laptop becomes much less and only 5GB is available. As far as I know, there are many duplicate files especially the photos imported from my Android phone. I guess it i...
For comparing two photos, you can use the ImageeMagick CLI. This is a powerful command-line tool for image manipulation (resizing, converting, editing, etc.). It also includes features as free duplicate photo finder to detect and remove duplicates or differences.
Method 1: Simple Comparison (compare command)
Checks pixel-level differences and outputs a difference image + similarity metric.
compare -metric PSNR image1.jpg image2.jpg diff.png- -metric PSNR: Uses Peak Signal-to-Noise Ratio (higher = more similar).
- diff.png: Generates a visual difference file (white pixels = differences).
Interpretation:
- PSNR > 30 dB → Very similar (likely duplicates).
- PSNR < 20 dB → Significant differences.
Method 2: Faster Hash Comparison
Generates a hash fingerprint of each image for quick exact matching. This can be working perfectly as duplicate image finder in some cases.
identify -format "%#" image1.jpg
identify -format "%#" image2.jpgIf the hashes match → exact duplicates. And it works only for identical files (fails on resized/edited images).