python - 使用 for 循环遍历二值化图像可能吗？

Question

这是我的python代码：

import cv2
img = cv2.imread("foo.jpg")

#here I can iterate trough each pixel since I have a 2D array
for x in range(img.shape[0]):
    for y in range(img.shape[1]):
    pass #maipulate each pixel

gary = cv2.cvtColor(img, COLOR_BGR2GRAY)
bin = cv2.threshold(gray,127,255,cv2.THRESH_BINARY)

#here I can not iterate trough each pixel since I have a 1D array
for x in range(img.shape[0]):
    for y in range(img.shape[1]):
        pass

我的问题：如何遍历二进制图像的每个像素？我想使用滑动窗口搜索算法。

标签： pythonnumpyopencvimage-processingbinary

Answer 1

您的代码不起作用，因为threshold()返回 2 个值的元组：您设置的阈值 (127) 和二进制图像。如果将这些分开，则可以使用相同的双循环来访问每个值/像素。
我已经修改了您的代码，因为那里还有几个错字。

import cv2
img = cv2.imread("foo.jpg")

#here I can iterate trough each pixel since I have a 2D array
for x in range(img.shape[0]):
    for y in range(img.shape[1]):
    pass #maipulate each pixel

gray= cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
thresh, bin_img = cv2.threshold(gray,127,255,cv2.THRESH_BINARY)

for x in range(bin_img.shape[0]):
    for y in range(bin_img.shape[1]):
        pass