remove red text from image

Question

How can I remove the red text from image,

src = cv2.imread('original.png', cv2.IMREAD_UNCHANGED)
src[:,:,2] = np.zeros([src.shape[0], src.shape[1]])
#cv2.imwrite('changed.png',src)

this does remove the red color but also gives it a blueish background,how can I fix this or maybe do it in a better way.

Ideally the output would be like this

you are removing the red channel from image not the red "color" — wishmaster, Apr 28 '20 at 23:20
check this: https://stackoverflow.com/questions/53592055/opencv-remove-text-from-image — faressalem, Apr 28 '20 at 23:25

score 1 · Answer 1 · answered Apr 28 '20 at 23:32

The problem is that your extracting the image's Red Component, and not the image's red channel itself. Try the following:

src = cv2.imread('original.png', cv2.IMREAD_UNCHANGED)
print(src.shape)

#extract red channel
red_channel = src[:,:,2]

#write red channel to greyscale image
cv2.imwrite('changed.png', red_channel)

Below you'll see resources that describe the difference. If you found this useful please mark as answer. Thanks

Resources:

Extract Red Component: https://pythonexamples.org/python-opencv-remove-red-channel-from-color-image/
Extract Red Channel: https://pythonexamples.org/python-opencv-extract-red-channel-of-image/

What changes should be made in the code if I want to keep only a particular color? Inmy case, I want to keep black color text only. — Virtuall.Kingg, Dec 10 '21 at 05:08

remove red text from image

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