52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
import numpy as np
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import cv2
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palette = (2 ** 11 - 1, 2 ** 15 - 1, 2 ** 20 - 1)
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def compute_color_for_labels(label):
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"""
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Simple function that adds fixed color depending on the class
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"""
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color = [int((p * (label ** 2 - label + 1)) % 255) for p in palette]
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return tuple(color)
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def draw_masks(image, mask, color, thresh: float = 0.7, alpha: float = 0.5):
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np_image = np.asarray(image)
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mask = mask > thresh
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color = np.asarray(color)
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img_to_draw = np.copy(np_image)
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# TODO: There might be a way to vectorize this
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img_to_draw[mask] = color
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out = np_image * (1 - alpha) + img_to_draw * alpha
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return out.astype(np.uint8)
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def draw_boxes(img, bbox, names=None, identities=None, masks=None, offset=(0, 0)):
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for i, box in enumerate(bbox):
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x1, y1, x2, y2 = [int(i) for i in box]
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x1 += offset[0]
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x2 += offset[0]
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y1 += offset[1]
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y2 += offset[1]
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# box text and bar
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id = int(identities[i]) if identities is not None else 0
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color = compute_color_for_labels(id)
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label = '{:}{:d}'.format(names[i], id)
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t_size = cv2.getTextSize(label, cv2.FONT_HERSHEY_PLAIN, 2, 2)[0]
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if masks is not None:
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mask = masks[i]
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img = draw_masks(img, mask, color)
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cv2.rectangle(img, (x1, y1), (x2, y2), color, 3)
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cv2.rectangle(img, (x1, y1), (x1 + t_size[0] + 3, y1 + t_size[1] + 4), color, -1)
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cv2.putText(img, label, (x1, y1 + t_size[1] + 4), cv2.FONT_HERSHEY_PLAIN, 2, [255, 255, 255], 2)
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return img
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if __name__ == '__main__':
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for i in range(82):
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print(compute_color_for_labels(i))
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