def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array), self.lab_array, decimal=3)
# Test the conversion with the rest of the illuminants.
for I in ["d50", "d55", "d65", "d75"]:
for obs in ["2", "10"]:
fname = "lab_array_{0}_{1}.npy".format(I, obs)
lab_array_I_obs = np.load(os.path.join(os.path.dirname(__file__), "data", fname))
assert_array_almost_equal(lab_array_I_obs, xyz2lab(self.xyz_array, I, obs), decimal=2)
for I in ["a", "e"]:
fname = "lab_array_{0}_2.npy".format(I)
lab_array_I_obs = np.load(os.path.join(os.path.dirname(__file__), "data", fname))
assert_array_almost_equal(lab_array_I_obs, xyz2lab(self.xyz_array, I, "2"), decimal=2)
def linearProPhotoRGB2Lab(img):
if not img.shape[2] == 3:
print('pp_rgb shape', img.shape)
raise UtilImageError('image channel number is not 3')
xyz = ProPhotoRGB2XYZ(img)
lab = color.xyz2lab(xyz)
return lab
def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array),
self.lab_array, decimal=3)
# Test the conversion with the rest of the illuminants.
for I in ["d50", "d55", "d65", "d75"]:
for obs in ["2", "10"]:
fname = "color/tests/data/lab_array_{0}_{1}.npy".format(I, obs)
lab_array_I_obs = np.load(fetch(fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, obs),
decimal=2)
for I in ["a", "e"]:
fname = "color/tests/data/lab_array_{0}_2.npy".format(I)
lab_array_I_obs = np.load(fetch(fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, "2"),
decimal=2)
def xyztolab(image, des):
illum = chromaticityAdaptation(des)
out = np.matmul(image, illum)
out1 = xyz2lab(out).astype(np.float32)
# print("lab")
# out2 = (out1 * 255 / np.max(out1)).astype('uint8')
# out = Image.fromarray(out1)
return out1
def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array),
self.lab_array, decimal=3)
# Test the conversion with the rest of the illuminants.
for I in ["d50", "d55", "d65", "d75"]:
for obs in ["2", "10"]:
fname = "lab_array_{0}_{1}.npy".format(I, obs)
lab_array_I_obs = np.load(
os.path.join(os.path.dirname(__file__), 'data', fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, obs),
decimal=2)
for I in ["a", "e"]:
fname = "lab_array_{0}_2.npy".format(I)
lab_array_I_obs = np.load(
os.path.join(os.path.dirname(__file__), 'data', fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, "2"),
decimal=2)
def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array),
self.lab_array,
decimal=3)
# Test the conversion with the rest of the illuminants.
for I in ["A", "B", "C", "d50", "d55", "d65"]:
I = I.lower()
for obs in ["2", "10", "R"]:
obs = obs.lower()
fname = f'color/tests/data/lab_array_{I}_{obs}.npy'
lab_array_I_obs = np.load(fetch(fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, obs),
decimal=2)
for I in ["d75", "e"]:
fname = f'color/tests/data/lab_array_{I}_2.npy'
lab_array_I_obs = np.load(fetch(fname))
assert_array_almost_equal(lab_array_I_obs,
xyz2lab(self.xyz_array, I, "2"),
decimal=2)
def preserve_color_cielch(content, stylized, image_name):
# extract info and convert to CIE-LCh for each image
rgbContent = io.imread(content)
labContent = color.lab2lch(
color.xyz2lab(color.rgb2xyz(numpy.asarray(rgbContent))))
labContentArray = numpy.array(labContent)
rgbStyle = io.imread(stylized)
labStyle = color.lab2lch(
color.xyz2lab(color.rgb2xyz(numpy.asarray(rgbStyle))))
labStyleArray = numpy.array(labStyle)
# color transfer
for i in range(len(labContentArray)):
for j in range(len(labContentArray[0])):
labContentArray[i][j][0] = labStyleArray[i][j][0]
labContentArray = color.xyz2rgb(
color.lab2xyz(color.lch2lab(labContentArray)))
viewer = ImageViewer(labContentArray)
viewer.show()
def G2_getfeatures(ims, fil_paras, gridshape, mode="reflect", cval=0):
'''
A routine which takes an array of images with 4 coords.
Dim 1 and 2: pixel position.
Dim 3: RGB channel index.
Dim 4: Time index.
'''
num_ims = ims.shape[3]
num_feats = gridshape[0] * gridshape[1]
out = np.zeros(num_ims * num_feats, dtype=np.float32).reshape(
(num_ims, num_feats))
# Generate the kernel prior to loop over images.
fil_values = fil_kernel(paras=fil_paras, n_stds=2)
# Iterate over images.
for i in range(num_ims):
featvec = np.arange(0, dtype=np.float32)
# Slice -> XYZ -> CIE Lab -> Take only Luminance channel.
im = col.xyz2lab(col.rgb2xyz(ims[:, :, :, i]))[:, :, 0]
# Convolution.
fil_response_real = ndi.convolve(input=im,
weights=fil_values["real"],
mode=mode,
cval=cval)
fil_response_imag = ndi.convolve(input=im,
weights=fil_values["imag"],
mode=mode,
cval=cval)
fil_response_magnitude = np.sqrt(
(fil_response_real**2 + fil_response_imag**2))
# Per-patch statistics.
imstats = patch_stats(image=fil_response_magnitude,
grid_h=gridshape[0],
grid_w=gridshape[1])
# Pass per-patch statistics through non-linearity to compute final feature vector.
imfeats = nonlin(imstats["mean"])
# Store the feature vector for this image.
out[i, :] = imfeats
# Output is the array of feature vectors, one feature vector for each image.
return out
def process_frame(self, n, filename, frame):
misc.imsave('{}_{}_{}_0.jpg'.format(filename, n, self.hash_type()),
frame)
frame = resize(frame, (self.height, self.width), mode='constant')
misc.imsave('{}_{}_{}_1.jpg'.format(filename, n, self.hash_type()),
frame)
frame = gaussian(frame, sigma=3.0, multichannel=True)
misc.imsave('{}_{}_{}_2.jpg'.format(filename, n, self.hash_type()),
frame)
xyz = color.convert_colorspace(frame, 'YUV', 'XYZ')
misc.imsave('{}_{}_{}_3.jpg'.format(filename, n, self.hash_type()),
xyz)
lab = color.xyz2lab(xyz)
misc.imsave('{}_{}_{}_4.jpg'.format(filename, n, self.hash_type()),
lab)
return lab
def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array),
self.lab_array, decimal=3)
def test_xyz2lab_dtype(self):
img = self.xyz_array.astype('float64')
img32 = img.astype('float32')
assert xyz2lab(img).dtype == img.dtype
assert xyz2lab(img32).dtype == img32.dtype
def linear_rgb2lab(rgb, illuminant="D65", observer="2"):
"""
Copy of skimage.color.colorconv.rgb2lab for linear RGB values
"""
return xyz2lab(linear_rgb2xyz(rgb), illuminant, observer)
def read_tiff_16bit_img_into_LAB(tiff_fn, exposure=0, normalize_Lab=False):
xyz = read_tiff_16bit_img_into_XYZ(tiff_fn, exposure)
lab = color.xyz2lab(xyz)
if normalize_Lab:
normalize_Lab_image(lab)
return lab
def hsi2lab(shi_pic):
tmp_rgb = color.hsv2rgb(hsv)
tmp_xyz = color.rgb2xyz(tmp_rgb)
return color.xyz2lab(tmp_xyz)
def test_xyz_to_lab_against_skimage(random_xyz):
assert np.allclose(random_xyz.to_lab(),
skcolor.xyz2lab(random_xyz),
rtol=1e-2)
def to_lab_from_xyz(self):
return Image(xyz2lab(self.to_rgb_from_gray()[:, :, :3])).convert_type(self.dtype)
def test_xyz2lab(self):
assert_array_almost_equal(xyz2lab(self.xyz_array),
self.lab_array,
decimal=3)
def read_tiff_16bit_img_into_LAB(tiff_fn, exposure=0, normalize_Lab=False):
xyz = read_tiff_16bit_img_into_XYZ(tiff_fn, exposure)
lab = color.xyz2lab(xyz)
if normalize_Lab:
normalize_Lab_image(lab)
return lab
def test_xyz2lab_channel_axis(self, channel_axis):
# test conversion with channels along a specified axis
xyz = np.moveaxis(self.xyz_array, source=-1, destination=channel_axis)
lab = xyz2lab(xyz, channel_axis=channel_axis)
lab = np.moveaxis(lab, source=channel_axis, destination=-1)
assert_array_almost_equal(lab, self.lab_array, decimal=3)
from skimage import img_as_float
from skimage.color import rgb2gray
from skimage import exposure
from skimage import color
from scipy import ndimage as ndi
from skimage.morphology import label, binary_erosion, binary_dilation, square, binary_opening, binary_closing
import operator
from itertools import repeat
fn = 'E:\Python\ANN\Projects\固高\定位\Image1.jpg'
img = io.imread(fn)
# using functions in Skimage #
# note the input image is assumed to be sRGB, and will be normalized to [0,1] range #
img_xyz = color.rgb2xyz(img)
img_lab = color.xyz2lab(img_xyz)
#plt.imshow(img_lab, cmap="gray")
#plt.show()
# using VN boy's coversion method #
# assume the input is CIE RGB #
def rgb2xyz_vn(img):
img = img.copy() / 255.
conv_mat = np.array([[0.4900, 0.3100, 0.2000], [0.1769, 0.8124, 0.0107],
[0.0000, 0.0099, 0.9901]])
xyz = np.dot(img, conv_mat.T)
return xyz