Welcome to DOFBOT Pro repository

5. OpenCV pixel operation

Pixel operation, we can change the pixel color at any position to a new one. Here we first read the image and then assign an area to white.

Code path:

x
~/dofbot_pro/dofbot_opencv/scripts/1.OpenCV_basic/04_pixel_pic.ipynb

The main code is as follows:

​x
import cv2

img = cv2.imread('yahboom.jpg',1)
(b,g,r) = img[100,100]
print(b,g,r)# bgr
#10 100 --- 110 100
i=j=0
for j in range(1,500):
      img[i,j] = (255,255,255)
      for i in range(1,500):
        img[i,j] = (255,255,255)
# cv2.imshow('image',img)
# cv2.waitKey(0) #1000 ms
 Image quality
Image zoom