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Jacaard_similarity_accuracy to the objectives #816
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Do you have some references at hand?
I'd be fine with this. Feel free to submit a PR. There are some things to consider:
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One of widely-used metrics for evaluationg the results of a segmentation task is the Jaccard_similarity_coefficients. It is as simple as diving the intersection region over the union region between two binary maps.
Adding this accuracy metric to the objectives (just like binary_accuracy) can be so helpful.
For more information, please see this Wikipedia page:
https://en.wikipedia.org/wiki/Jaccard_index
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