{ }
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Greedily selects a subset of bounding boxes in descending order of score.
tf.image.non_max_suppression_padded(
boxes,
scores,
max_output_size,
iou_threshold=0.5,
score_threshold=float('-inf'),
pad_to_max_output_size=False,
name=None,
sorted_input=False,
canonicalized_coordinates=False,
tile_size=512
)
Performs algorithmically equivalent operation to tf.image.non_max_suppression,
with the addition of an optional parameter which zero-pads the output to
be of size max_output_size
.
The output of this operation is a tuple containing the set of integers
indexing into the input collection of bounding boxes representing the selected
boxes and the number of valid indices in the index set. The bounding box
coordinates corresponding to the selected indices can then be obtained using
the tf.slice
and tf.gather
operations. For example:
selected_indices_padded, num_valid = tf.image.non_max_suppression_padded(
boxes, scores, max_output_size, iou_threshold,
score_threshold, pad_to_max_output_size=True)
selected_indices = tf.slice(
selected_indices_padded, tf.constant([0]), num_valid)
selected_boxes = tf.gather(boxes, selected_indices)