def __call__(self, results):
"""Call functions to add image meta information.
Args:
results (dict): Result dict with Webcam read image in
``results['img']``.
Returns:
dict: The dict contains loaded image and meta information.
"""
assert results['img'].dtype == 'uint8'
img = results['img']
if self.color_type == 'grayscale' and img.shape[2] == 3:
img = mmcv.bgr2gray(img, keepdim=True)
if self.color_type == 'color' and img.shape[2] == 1:
img = mmcv.gray2bgr(img)
if self.to_float32:
img = img.astype(np.float32)
results['filename'] = None
results['ori_filename'] = None
results['img'] = img
results['img_shape'] = img.shape
results['ori_shape'] = img.shape
results['img_fields'] = ['img']
return results
def test_gray2bgr(self):
in_img = np.random.rand(10, 10).astype(np.float32)
out_img = mmcv.gray2bgr(in_img)
assert out_img.shape == (10, 10, 3)
for i in range(3):
assert_array_almost_equal(out_img[..., i], in_img, decimal=4)
def __call__(self, img, boxes, labels, masks=None):
if self.color_choose == 0:
if random.uniform() < self.gray_p:
gray = mmcv.bgr2gray(img)
img = mmcv.gray2bgr(gray)
return img, boxes, labels, masks
# random brightness
if random.randint(2):
delta = random.uniform(-self.brightness_delta,
self.brightness_delta)
img += delta
# mode == 0 --> do random contrast first
# mode == 1 --> do random contrast last
mode = random.randint(2)
if mode == 1:
if random.randint(2):
alpha = random.uniform(self.contrast_lower,
self.contrast_upper)
img *= alpha
# convert color from BGR to HSV
img = mmcv.bgr2hsv(img)
# random saturation
if random.randint(2):
img[..., 1] *= random.uniform(self.saturation_lower,
self.saturation_upper)
# random hue
if random.randint(2):
img[..., 0] += random.uniform(-self.hue_delta, self.hue_delta)
img[..., 0][img[..., 0] > 360] -= 360
img[..., 0][img[..., 0] < 0] += 360
# convert color from HSV to BGR
img = mmcv.hsv2bgr(img)
# random contrast
if mode == 0:
if random.randint(2):
alpha = random.uniform(self.contrast_lower,
self.contrast_upper)
img *= alpha
# randomly swap channels
if random.randint(2):
img = img[..., random.permutation(3)]
else:
if self.color_choose == 1:
# random brightness
if random.randint(2):
delta = random.uniform(-self.brightness_delta,
self.brightness_delta)
img += delta
elif self.color_choose == 2:
# random contrast first
if random.randint(2):
alpha = random.uniform(self.contrast_lower,
self.contrast_upper)
img *= alpha
else:
# convert color from BGR to HSV
img = mmcv.bgr2hsv(img)
if self.color_choose == 3:
# random saturation
if random.randint(2):
img[..., 1] *= random.uniform(self.saturation_lower,
self.saturation_upper)
if self.color_choose == 4:
# random hue
if random.randint(2):
img[..., 0] += random.uniform(-self.hue_delta,
self.hue_delta)
img[..., 0][img[..., 0] > 360] -= 360
img[..., 0][img[..., 0] < 0] += 360
# convert color from HSV to BGR
img = mmcv.hsv2bgr(img)
return img, boxes, labels, masks
