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#!/usr/bin/env python3 | |
import numpy as np | |
from typing import List | |
from detectron2.structures import Instances | |
def create_prediction_pairs( | |
instances: Instances, | |
prev_instances: Instances, | |
iou_all: np.ndarray, | |
threshold: float = 0.5, | |
) -> List: | |
""" | |
Args: | |
instances: predictions from current frame | |
prev_instances: predictions from previous frame | |
iou_all: 2D numpy array containing iou for each bbox pair | |
threshold: below the threshold, doesn't consider the pair of bbox is valid | |
Return: | |
List of bbox pairs | |
""" | |
bbox_pairs = [] | |
for i in range(len(instances)): | |
for j in range(len(prev_instances)): | |
if iou_all[i, j] < threshold: | |
continue | |
bbox_pairs.append( | |
{ | |
"idx": i, | |
"prev_idx": j, | |
"prev_id": prev_instances.ID[j], | |
"IoU": iou_all[i, j], | |
"prev_period": prev_instances.ID_period[j], | |
} | |
) | |
return bbox_pairs | |
LARGE_COST_VALUE = 100000 | |