blakeblackshear.frigate/frigate/test/test_yuv_region_2_rgb.py

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import cv2
import numpy as np
from unittest import TestCase, main
from frigate.util import yuv_region_2_rgb
class TestYuvRegion2RGB(TestCase):
def setUp(self):
self.bgr_frame = np.zeros((100, 200, 3), np.uint8)
self.bgr_frame[:] = (0, 0, 255)
self.bgr_frame[5:55, 5:55] = (255,0,0)
# cv2.imwrite(f"bgr_frame.jpg", self.bgr_frame)
self.yuv_frame = cv2.cvtColor(self.bgr_frame, cv2.COLOR_BGR2YUV_I420)
def test_crop_yuv(self):
cropped = yuv_region_2_rgb(self.yuv_frame, (10,10,50,50))
# ensure the upper left pixel is blue
assert(np.all(cropped[0, 0] == [0, 0, 255]))
def test_crop_yuv_out_of_bounds(self):
cropped = yuv_region_2_rgb(self.yuv_frame, (0,0,200,200))
# cv2.imwrite(f"cropped.jpg", cv2.cvtColor(cropped, cv2.COLOR_RGB2BGR))
# ensure the upper left pixel is red
# the yuv conversion has some noise
assert(np.all(cropped[0, 0] == [255, 1, 0]))
# ensure the bottom right is black
assert(np.all(cropped[199, 199] == [0, 0, 0]))
def test_crop_yuv_portrait(self):
bgr_frame = np.zeros((1920, 1080, 3), np.uint8)
bgr_frame[:] = (0, 0, 255)
bgr_frame[5:55, 5:55] = (255,0,0)
# cv2.imwrite(f"bgr_frame.jpg", self.bgr_frame)
yuv_frame = cv2.cvtColor(bgr_frame, cv2.COLOR_BGR2YUV_I420)
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cropped = yuv_region_2_rgb(yuv_frame, (0, 852, 648, 1500))
# cv2.imwrite(f"cropped.jpg", cv2.cvtColor(cropped, cv2.COLOR_RGB2BGR))
if __name__ == '__main__':
main(verbosity=2)