在OpenCV Python中获取src类型CV_8UC3到CV_8UC1时出错？ 将cv2作为cv导入 将numpy作为np导入 从matplotlib导入pyplot作为plt img=cv.imread（'t2.jpg'，cv.COLOR\bgr2灰色） 模糊=cv.高斯模糊（img，（5,5,0） ret3，th3=cv.阈值（模糊，0，255，cv.THRESH\u二进制+cv.THRESH\u大津）

我得到错误信息：

Traceback (most recent call last):
  File "F:/l4 project docs/project/l4proTest1/projectionStepTest.py", line 11, in <module>
    ret3,th3 = cv.threshold(blur, 0, 255, cv.THRESH_BINARY + cv.THRESH_OTSU)
cv2.error: OpenCV(4.4.0) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-9d_dfo3_\opencv\modules\imgproc\src\thresh.cpp:1557: error: (-2:Unspecified error) in function 'double __cdecl cv::threshold(const class cv::_InputArray &,const class cv::_OutputArray &,double,double,int)'

或

THRESH_OTSU mode:
    'src_type == CV_8UC1 || src_type == CV_16UC1'
where
    'src_type' is 16 (CV_8UC3)

Process finished with exit code 1

img = cv.imread('t2.jpg', cv.IMREAD_GRAYSCALE)

img = cv.imread('t2.jpg', cv.IMREAD_COLOR)
img = cv.cvtColor(img, cv.COLOR_BGR2GRAY)