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. 2022 Jul 19;8:e1045. doi: 10.7717/peerj-cs.1045

Figure 5. Illustration of a Jigsaw puzzle pretext task.

Figure 5

(left): The Puzzle generation steps where an image is cropped into a set of patches that constitute the main blocks of the puzzle. The generated patches are shuffled according to a predefined set of permutations where each permutation has a specific index (permutation number). (right): a Siamese network, with shared weights, takes the shuffled patches as input according to certain permutation and classifies them to the respective permutation index. Image credit: Mathilde Langevin.