I would like to gray out Python & OpenCV, but an AttributeError appears.

US>Tools used
·Python 3.6
·OpenCV 4.5 ( 最新I included the latest version)
·Anaconda 3.0

I touched on image processing for the first time.At first, I thought it would be really fun, but I got an error and the program didn't work at all.

I was told that it doesn't work because the OpenCV version is different, but to be honest, I don't know what the difference is.

Error Occurring

AttributeError: module 'cv2.cv2' has no attribute 'cvtcolor'

Code you want to move

import cv2
image=cv2.imread(r"C:\library_cv\sky_006.jpg)
gray=cv2.cvtcolor(image,cv2.COLOR.BGR2GRAY)
cv2.imwrite(r "C:\write_cv\gray_006.jpg")

The goal is to use cv2.countNonZero in the above code to produce a white percentage.
*The image name is virtual, but it is generally the same.

2022-09-30 18:06

1 Answers

There are several types including the error in the question.
It should work by doing the following:

import cv2
image=cv2.imread(r"C:\library_cv\sky_006.jpg")
gray=cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)
cv2.imwrite(r "C:\write_cv\gray_006.jpg", gray)

imread filename " is not closed (it must be a transcription error when questioning)
cvtcolor in cvtcolor starts with a capital letter cvtColor
cv2.COLOR.BGR2GRAY is a mistake in cv2.COLOR_BGR2GRAY (connect with _ instead of .)
imwrite must specify an object in the image in the second parameter

Return value
- retval: Threshold (return value to know the threshold automatically determined using cv2.THRESH_OTSU, cv2.THRESH_TRIANGLE)
- dst:binary image

retval: Threshold (return value to know the threshold automatically determined using cv2.THRESH_OTSU, cv2.THRESH_TRIANGLE)
dst:binary image

2022-09-30 18:06

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