Your test score may be lying: near-duplicate images between training and test sets
In short If an image in your test set is a near-copy of an image in your training set, the model has already seen it. Your test score then looks better than it really is. A short Python script (about 50 lines) finds most of these copies. It shrinks every image to a tiny grey thumbnail and compares…
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- 2026-11-09 11:55 · DEV Community — Machine Learning
Your test score may be lying: near-duplicate images between training and test sets