Opencv图像处理

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#常用词汇

#图像读取，显示，保存

#编程使得图片中的蓝色三角形改变成黑色

#代码

import numpy as np
import cv2
img = cv2.imread("shape.jpg")
height,width,channel= img.shape
for i in range (height):
    for j in range(width):
        for k in range(0,3):
             if 100 <img[i, j,0]<170:
                img.itemset((i,j,0),0)
                img.itemset((i,j,1),0)
                img.itemset((i,j,2),0)
cv2.imshow("shape",img)
cv2.waitKey(0)
cv2.destroyAllWindows()

#效果