Don't know how to change images into grayscale under linux

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1

I have already change images into grayscale under windows system by using python ,however when it turned into linux i found it need more code to guide the computer . I may can get the code to achieve but i don’t know how to write the cmake projects. So I beg someone can provide me a executable example on linux for me to learn more.

With my best wishes ,hoping for replaying!

2

Hi
python3 code for linux or windows are the same.
What have you already try?

3

I tried to turn a image into grayscale with the same code but i don’t know how to achieve it on linux by using cmake to compile them into machine language and the way to execute it.

4

Please
Show us your code

5

like this

import cv2
import numpy as np
img = cv2.imread(“1.png”,0)
cv2.imshow(“img”,img)
cv2.waitKay()

6

Yes it works if image exist on disk

you should write (tutorials here ):

import cv2 as cv
import sys
img = cv.imread("starry_night.jpg")
if img is None:
    sys.exit("Could not read the image.")
cv.imshow("Display window", img)
k = cv.waitKey(0)
if k == ord("s"):
    cv.imwrite("starry_night.png", img)
k = cv.waitKey(0)

give full path to image

7

Thank you!
Let me learn and have a try :grin: