let summary = [{
Greedily selects a subset of bounding boxes in descending order of score,
  }];

  let description = [{
pruning away boxes that have high intersection-over-union (IOU) overlap
with previously selected boxes.  Bounding boxes with score less than
`score_threshold` are removed.  Bounding boxes are supplied as
[y1, x1, y2, x2], where (y1, x1) and (y2, x2) are the coordinates of any

            backwards. See PR
            [47925](https://github.com/tensorflow/tensorflow/pull/47925).
        *   `tf.image.crop_and_resize` gradient w.r.t. either `image` or
            `boxes`. See PR
            [48905](https://github.com/tensorflow/tensorflow/pull/48905).
        *   `tf.sparse.sparse_dense_matmul` forwards. See PR
            [50355](https://github.com/tensorflow/tensorflow/pull/50355).