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Tutorial - numpy for changing color of an image at pixel level.

import numpy as np
import matplotlib.pyplot as plt
import cv2 as cv

#this program conversts color of certain sections of image
#each pixel is checked for the r g b and modified using a numpy array



image = cv.imread('rg.png')
#print(image.shape)
#print(np.asarray(image))

width , height , channels = image.shape
#print(width)
#print(height)
#print(channels)

plt.imshow(image)
plt.show()
#print(image[29][29])

zero_array = np.zeros((2, 3, 3))


for pixeli in range(width):
    #print(pixeli)
    for pixelj in range(height):
       # print(pixeli,pixelj)
        #print(image[pixeli][pixelj])
        pixelvalue = image[pixeli][pixelj]
        #print(pixelvalue)
        if pixelvalue[0] == 76 and pixelvalue[1] == 177 and pixelvalue[2] == 34:
            #print('mach')
            r = 0
            g = 0
            b = 0
            image[pixeli][pixelj] = [r, g, b]
 
plt.imshow(image)
plt.show()


The pixel level color are changed as you can see the change in lower right rectangles.
please feel free to add any comments.

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