def get_vertical_white_edge_dis(img):
"""Get vertical white edge distance of character image.
Args:
img: Character image.
Returns:
An interger distance.
"""
bw = imu.preprocess_bw_inv(img)
weight, profile = imu.horizontal_proj(bw)
horCoorY1 = 0
if weight[0] == 0:
i = 0
while weight[i] == 0 and i < len(weight):
i += 1
horCoorY1 = i
horCoorY2 = len(weight) - 1
if weight[-1] == 0:
j = len(weight) - 1
while weight[j] == 0 and j > 0:
j -= 1
horCoorY2 = j
return horCoorY1, len(weight) - horCoorY2
def divide_hor(img, coor):
"""Divide paper by blank detection in horizontal direction.
Args:
img: Image to be divided.
Returns:
A list of vertical coordinates.
"""
h, w = img.shape[0:2]
result = []
for c in coor:
horCoorY1 = []
horCoorY2 = []
imgPart = img[0:h, c[0]:c[1]]
bw = imu.preprocess_bw_inv(imgPart)
weight, profile = imu.horizontal_proj(bw)
if weight[0] > 0:
horCoorY1.append(0)
for i in range(1, len(weight) - 1):
if weight[i] > 0:
if weight[i + 1] == 0:
horCoorY2.append(i)
if weight[i - 1] == 0:
horCoorY1.append(i)
if weight[-1] > 0:
horCoorY2.append(len(weight) - 1)
# print(verCoorX1)
# print(verCoorX2)
line = list(zip(horCoorY1, horCoorY2))
for l in line:
if l[1] - l[0] > 10:
result.append((c[0], l[0], c[1], l[1]))
return result