utils.py 文件源码

def jaccard_raster(true_raster, pred_raster):
    assert true_raster.shape[2] == pred_raster.shape[2] == 10
    score = []
    for i in range(10):
        true = true_raster[:, :, i] != 0
        pred = pred_raster[:, :, i] != 0
        tp = np.sum(true * pred)
        fp = np.sum(pred) - tp
        fn = np.sum(true) - tp
        if tp == 0:
            jac = 0.
        else:
            jac = tp / float(fp + fn + tp)
        score.append((tp, fp, fn, jac))
    score = np.array(score)
    assert score.shape == (10, 4)
    return score