OpenCV半小时掌握基本操作之边界填充

cv.copyMakeBorder(img,top, bottom, left, right ,borderType)

# 读取图片
img = cv2.imread("picture2.jpg")

# 填充像素
top_size = 50
bottom_size = 50
left_size = 50
right_size = 50

# Replicate (复制法)
replicate = cv2.copyMakeBorder(img, top_size, bottom_size, left_size, right_size, borderType=cv2.BORDER_REPLICATE)
cv2.imshow("replicate", replicate)
cv2.waiTKEy(0)
cv2.destroyAllwindows()

# 读取图片
img = cv2.imread("picture2.jpg")

# 填充像素
top_size = 50
bottom_size = 50
left_size = 50
right_size = 50

# Reflect (反射法)
reflect = cv2.copyMakeBorder(img, top_size, bottom_size, left_size, right_size, cv2.BORDER_REFLECT)
cv2.imshow("reflect", reflect)
cv2.waitKey(0)
cv2.destroyAllWindows()

# 填充像素
top_size = 50
bottom_size = 50
left_size = 50
right_size = 50

# Reflect101 (反射法101)
reflect101 = cv2.copyMakeBorder(img, top_size, bottom_size, left_size, right_size, cv2.BORDER_REFLECT_101)
cv2.imshow("reflect101", reflect101)
cv2.waitKey(0)
cv2.destroyAllWindows()

# 读取图片
img = cv2.imread("picture2.jpg")

# 填充像素
top_size = 50
bottom_size = 50
left_size = 50
right_size = 50

# wrap (外包方法)
wrap = cv2.copyMakeBorder(img, top_size, bottom_size, left_size, right_size, cv2.BORDER_WRAP)
cv2.imshow("wrap", wrap)
cv2.waitKey(0)
cv2.destroyAllWindows()

# 读取图片
img = cv2.imread("picture2.jpg")

# 填充像素
top_size = 50
bottom_size = 50
left_size = 50
right_size = 50

# constant (常量法)
constant = cv2.copyMakeBorder(img, top_size, bottom_size, left_size, right_size, cv2.BORDER_CONSTANT, value=0)
cv2.imshow("constant", constant)
cv2.waitKey(0)
cv2.destroyAllWindows()

cv2.imwrite("constant.jpg", constant)