Convert Black and White image to Gray in python-CodePudding

how can I convert this black and white image to this gray coloured image?

Black and White Image

Grey Scale Image

in python

CodePudding user response：

The best that you can do in Python/OpenCV is just change black to gray in your image.

Input:

import cv2
import numpy as np

img = cv2.imread('bw_img.png', 0)
result = img.copy()
result[result==0] = 128

cv2.imwrite('bw_img_grayed.png', result)

cv2.imshow('result', result)
cv2.waitKey(0)

Result:

CodePudding user response：

try this:

import cv2
from PIL import Image

cur_frame = Image.open('image.jpg')
gray_image = cv2.cvtColor(cur_frame, cv2.COLOR_BGR2GRAY)
cv2.imshow("show image", gray_image)