Recall Precision Question

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Transcript of Recall Precision Question

  • Plot the precision-recall curve for the following query and its results.

    Solu%on:

    Points on the curve are generated by changing the distance threshold such that images are returned if their distance are less than or equal to the threshold.

    a. Threshold in [0, 7.56): precision is 1, recall is 0.25. b. Threshold in [7.56, 7.785): precision is 1, recall is 0.5. c. Threshold in [7.785, 8.289): precision is 0.67, recall is 0.5. d. Threshold in [8.289, 8.45): precision is 0.5, recall is 0.5. e. Threshold in [8.45, 8.583): precision is 0.6, recall is 0.75. f. Threshold in 8.583: precision is 0.67, recall is 1. g. To plot the PR curve, we use the horizontal axis for recall and the verMcal for

    precision and plot the values we obtained above.


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