How to embed an image to a cover image by selecting random pixels in cover image?

def embedding(hideImagePath,coverImagePath):
    img1 = cv2.imread(coverImagePath, 0)
    img2 = cv2.imread(hideImagePath, 0)
    for i in range (img2.shape[0]):
        for j in range(img2.shape[1]):
                #convert pixel to binary 
                pixels_cover = format(img1[i][j], '08b')
                pixels_hide = format(img2[i][j], '08b')
                #replace the last 2 LSB from cover image with 2 MSB from hide image
                stegoImage = pixels_cover[:6] + pixels_hide[:2]
                img1[i][j] = int(stegoImage, 2)
    cv2.imwrite('StegoImage.png', img1)

Above is the code that I done so far. It hide pixels in cover image sequentially but I need it to hide the image to the cover image by selecting random pixels from the cover image.

Answer

Conceptually you want to generate all the pixel coordinates and shuffle them in a deterministic way, so that the extraction knows where to look.

import itertools as it
import random

def permute_indices(shape, password):
    indices = list(it.product(*map(range, shape)))
    random.seed(password)
    random.shuffle(indices)
    return iter(indices)

For example

>>> idx = permute_indices((600, 800), 'hunter2')
>>> for _ in range(5):
    print(next(idx))

    
(411, 359)
(379, 680)
(110, 612)
(246, 388)
(232, 605)

Adjustments to your code

def embedding(hideImagePath, coverImagePath, password):
    img1 = cv2.imread(coverImagePath, 0)
    img2 = cv2.imread(hideImagePath, 0)
    indices = permute_indices(img1.shape, password)
    for i in range (img2.shape[0]):
        for j in range(img2.shape[1]):
                x, y = next(indices)
                #convert pixel to binary
                pixels_cover = format(img1[x][y], '08b')
                pixels_hide = format(img2[i][j], '08b')
                #replace the last 2 LSB from cover image with 2 MSB from hide image
                stegoImage = pixels_cover[:6] + pixels_hide[:2]
                img1[x][y] = int(stegoImage, 2)
    cv2.imwrite('StegoImage.png', img1)