[英]OpenCV2 converting image into gray scale & finding edges but getting this error
我遇到错误,OpenCV2将图像转换为灰度并找到边缘,但出现此错误
import cv2
import numpy as np
img = cv2.imread(r"F:\Python_Folder\lena.jpg")
# img = cv2.imread(r"F:\Python_Folder\lena.jpg",0) also tried this
grey_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
laplacian = cv2.Laplacian(grey_img, cv2.CV_64F)
cv2.imshow("Laplacian image",laplacian)
cv2.waitKey(0)
cv2.destroyAllWindows()
错误:
Traceback (most recent call last):
File "F:/Python_Folder/new.py", line 7, in <module>
cv2.imshow("Laplacian image",laplacian)
cv2.error: OpenCV(4.0.0) c:\projects\opencv-python\opencv\modules\imgproc\src\color.hpp:261: error: (-2:Unspecified error) in function '__thiscall cv::CvtHelper<struct cv::Set<1,-1,-1>,struct cv::Set<3,4,-1>,struct cv::Set<0,2,5>,2>::CvtHelper(const class cv::_InputArray &,const class cv::_OutputArray &,int)'
> Unsupported depth of input image:
> 'VDepth::contains(depth)'
> where
> 'depth' is 6 (CV_64F)
您必须将图像转换回uint8。 检查以下已编辑的代码段:
import cv2
import numpy as np
img = cv2.imread("F:\Python_Folder\lena.jpg")
# img = cv2.imread(r"F:\Python_Folder\lena.jpg",0) also tried this
grey_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
laplacian = cv2.Laplacian(grey_img, cv2.CV_64F)
# convert back to uint8
laplacian = cv2.convertScaleAbs(laplacian)
cv2.imshow("Laplacian image",laplacian)
cv2.waitKey(0)
cv2.destroyAllWindows()
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