Shi–Tomasi Corners
The "Good Features to Track" corner detector published by Jianbo Shi and Carlo Tomasi in 1994. A small change to Harris scoring gives evenly spread, reliable points that suit video tracking and motion estimation.
Spot it
- 01Evenly spread green dots
- 02Strong-corner-only selection
- 03Faded photo beneath
Why it happens
Computes the local gradient matrix in a window and scores each pixel by its smaller eigenvalue, keeping only well-separated points whose score exceeds a quality threshold.
Recreate it in Pixio
Image edit prompt“Show Shi–Tomasi good features on this image: slightly fade the original photo and mark the best trackable points with small bright green rings and center dots, evenly spaced across textured regions and corners, with none on blank sky or flat walls. About one hundred points total. Keep the original subject and composition recognizable.”
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