def threshold(pixels, image, angle):
intervals = []
for y in range(len(pixels)):
intervals.append([])
for x in range(len(pixels[0])):
if util.lightness(pixels[y][x]) < 0.25 or util.lightness(
pixels[y][x]) > 0.8:
intervals[y].append(x)
intervals[y].append(len(pixels[0]))
return intervals
def threshold(pixels, image, angle):
intervals = []
for y in range(len(pixels)):
intervals.append([])
for x in range(len(pixels[0])):
if util.lightness(pixels[y][x]) < 0.25 or util.lightness(pixels[y][x]) > 0.8:
intervals[y].append(x)
intervals[y].append(len(pixels[0]))
return intervals
def threshold(image, lower_threshold, upper_threshold, **kwargs):
intervals = []
image_data = image.load()
for y in range(image.size[1]):
intervals.append([])
for x in range(image.size[0]):
level = lightness(image_data[x, y])
if level < lower_threshold or level > upper_threshold:
intervals[y].append(x)
return intervals
def edge(image, lower_threshold, **kwargs):
edge_data = image.filter(ImageFilter.FIND_EDGES).convert('RGBA').load()
intervals = []
for y in range(image.size[1]):
intervals.append([])
flag = True
for x in range(image.size[0]):
if lightness(edge_data[x, y]) < lower_threshold:
flag = True
elif flag:
intervals[y].append(x)
flag = False
return intervals
def file_edges(pixels, image, angle):
img = Image.open(image)
img = img.rotate(angle, expand=True)
img = img.resize((len(pixels[0]), len(pixels)), Image.ANTIALIAS)
edges = img.filter(ImageFilter.FIND_EDGES)
edges = edges.convert('RGBA')
edge_data = edges.load()
filter_pixels = []
edge_pixels = []
intervals = []
for y in range(img.size[1]):
filter_pixels.append([])
for x in range(img.size[0]):
filter_pixels[y].append(edge_data[x, y])
for y in range(len(pixels)):
edge_pixels.append([])
for x in range(len(pixels[0])):
if util.lightness(filter_pixels[y][x]) < 0.25:
edge_pixels[y].append(constants.white_pixel)
else:
edge_pixels[y].append(constants.black_pixel)
for y in range(len(pixels) - 1, 1, -1):
for x in range(len(pixels[0]) - 1, 1, -1):
if edge_pixels[y][x] == constants.black_pixel and edge_pixels[y][x - 1] == constants.black_pixel:
edge_pixels[y][x] = constants.white_pixel
for y in range(len(pixels)):
intervals.append([])
for x in range(len(pixels[0])):
if edge_pixels[y][x] == constants.black_pixel:
intervals[y].append(x)
intervals[y].append(len(pixels[0]))
return intervals
def file_edges(pixels, image, angle):
img = Image.open(image)
img = img.rotate(angle, expand=True)
img = img.resize((len(pixels[0]), len(pixels)), Image.ANTIALIAS)
edges = img.filter(ImageFilter.FIND_EDGES)
edges = edges.convert('RGBA')
edge_data = edges.load()
filter_pixels = []
edge_pixels = []
intervals = []
for y in range(img.size[1]):
filter_pixels.append([])
for x in range(img.size[0]):
filter_pixels[y].append(edge_data[x, y])
for y in range(len(pixels)):
edge_pixels.append([])
for x in range(len(pixels[0])):
if util.lightness(filter_pixels[y][x]) < 0.25:
edge_pixels[y].append(constants.white_pixel)
else:
edge_pixels[y].append(constants.black_pixel)
for y in range(len(pixels) - 1, 1, -1):
for x in range(len(pixels[0]) - 1, 1, -1):
if edge_pixels[y][x] == constants.black_pixel and edge_pixels[y][
x - 1] == constants.black_pixel:
edge_pixels[y][x] = constants.white_pixel
for y in range(len(pixels)):
intervals.append([])
for x in range(len(pixels[0])):
if edge_pixels[y][x] == constants.black_pixel:
intervals[y].append(x)
intervals[y].append(len(pixels[0]))
return intervals
def lightness(pixel):
return util.lightness(pixel)