def test_otsu(self):
assert threshold_otsu(self.image) == 2
def test_otsu_coins_image_as_float():
coins = skimage.img_as_float(data.coins())
assert 0.41 < threshold_otsu(coins) < 0.42
def test_otsu_lena_image():
assert threshold_otsu(data.lena()) == 141
def test_otsu_coins_image():
assert threshold_otsu(data.coins()) == 107
def test_otsu_coins_image():
assert threshold_otsu(data.coins()) == 107
def test_otsu_camera_image():
camera = skimage.img_as_ubyte(data.camera())
assert 86 < threshold_otsu(camera) < 88
def test_otsu_coins_image_as_float():
coins = skimage.img_as_float(data.coins())
assert 0.41 < threshold_otsu(coins) < 0.42
def test_otsu_camera_image():
camera = skimage.img_as_ubyte(data.camera())
assert 86 < threshold_otsu(camera) < 88
def test_otsu(self):
assert threshold_otsu(self.image) == 2
def test_otsu_coins_image():
coins = skimage.img_as_ubyte(data.coins())
assert 106 < threshold_otsu(coins) < 108
def test_otsu_lena_image():
lena = skimage.img_as_ubyte(data.lena())
assert 140 < threshold_otsu(lena) < 142
def test_otsu_astro_image():
img = skimage.img_as_ubyte(data.astronaut())
assert 109 < threshold_otsu(img) < 111
from skimage.filter.thresholding import threshold_otsu
import scipy.misc
import Image
# opening the image and converting it to grayscale
a = Image.open('../Figures/sem3.png').convert('L')
# a is converted to an ndarray
a = scipy.misc.fromimage(a)
# performing Otsu's thresholding
thresh = threshold_otsu(a)
# pixels with intensity greater than
# theshold are kept
b = a > thresh
# b is converted from ndimage to
b = scipy.misc.toimage(b)
# saving the image as sk_otsu.png
b.save('../Figures/otsu_semoutput.png')
def test_otsu_lena_image():
assert threshold_otsu(data.lena()) == 141
def test_otsu_negative_int(self):
image = self.image - 2
assert threshold_otsu(image) == 0
def test_otsu_negative_int(self):
image = self.image - 2
assert threshold_otsu(image) == 0
def test_otsu_float_image(self):
image = np.float64(self.image)
assert 2 <= threshold_otsu(image) < 3
def test_otsu_float_image(self):
image = np.float64(self.image)
assert 2 <= threshold_otsu(image) < 3
def test_otsu_coins_image():
coins = skimage.img_as_ubyte(data.coins())
assert 106 < threshold_otsu(coins) < 108
def test_otsu_camera_image():
assert threshold_otsu(data.camera()) == 87
def test_otsu_lena_image():
lena = skimage.img_as_ubyte(data.lena())
assert 140 < threshold_otsu(lena) < 142
def test_otsu_camera_image():
assert threshold_otsu(data.camera()) == 87
