Moving and writing pixels of an image -Python-

Question

Ok, I got a newbie question in python. So I've a list with the coordinate of some pixels I'm interested for. I'd like to move those pixels into another image or saving those pixels in a new image. I'm working with cv2 and matplotlib so far, I even thought of saving the coordinates with RGB values and writing it onto another image, but I don't got any idea to start with. Sorry if its a kind of dumb question, thanks

Answer 1

You can do this just like in numpy array. For example, you want to take first 10x10 part of the RGB image with all three channels. Basically;

new_image = np.zeros([10, 10, 3], dtype=np.uint8)
new_image[:, :, :] = old_image[:10, :10, :]

Answer 2

img_src = cv2.imread('someimg.jpg')
h, w, c = img_src.shape

# an empty black image for saving pixels
img_dest = np.zeros((h, w, c), dtype=np.uint8)


for ixy in xy_list:
    x, y = xy_list[ixy]

    # copy pixels at given locations
    img_dest[x, y, :] = img_src[x, y, :]


cv2.imwrite('output.jpg', img_dest)

Could this solve your problem?