提取ROI区域,处理然后放回去:
泛洪填充
测试代码:显示一张图像,鼠标点击之后,会从该点开始进行填充,显示填充后的结果图像
注:二值图像的填充需要使用选项:cv2.FLOODFILL_MASK_ONLY
选项说明:
cv2.FLOODFILL_FIXED_RANGE
:改变图像,泛洪填充cv2.FLOODFILL_MASK_ONLY
:不改变图像,只填充遮罩层本身,忽略新的颜色值参数
import cv2
import numpy as np
# 读取一张图片
src = cv2.imread("../images/CrystalLiu2.jpg")
# 命名一个窗口
cv2.namedWindow("input image", cv2.WINDOW_AUTOSIZE)
def fill_color_demo(image, x, y):
copyImg = image.copy()
h, w = image.shape[:2]
mask = np.zeros([h+2, w+2], np.uint8)
cv2.floodFill(copyImg, mask, (x, y), (0, 255, 255), (100, 100, 100), (50, 50, 50), cv2.FLOODFILL_FIXED_RANGE)
cv2.imshow("fill", copyImg)
cv2.setMouseCallback(\'fill\', draw_circle)
def draw_circle(event, x, y, flags, param):
if event == cv2.EVENT_LBUTTONDOWN:
fill_color_demo(src, x, y)
# 显示一张图片
cv2.imshow("input image", src)
cv2.setMouseCallback(\'input image\', draw_circle)
# 等待键盘按键
cv2.waitKey(0)
# 销毁所有窗口
cv2.destroyAllWindows()