python - 在 OpenCV Python 中获取 src 类型 CV_8UC3 到 CV_8UC1 时出错？

Question

This question already has an answer here:

Opencv - Grayscale mode Vs gray color conversion

(1 个回答)


9 个月前关闭。

import cv2 as cv
import numpy as np
from matplotlib import pyplot as plt

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

blur = cv.GaussianBlur(img, (5, 5), 0)
ret3, th3 = cv.threshold(blur, 0, 255, cv.THRESH_BINARY + cv.THRESH_OTSU)

我收到错误:

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)'

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

Process finished with exit code 1

最佳答案

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

或者

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

关于python - 在 OpenCV Python 中获取 src 类型 CV_8UC3 到 CV_8UC1 时出错？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/64421671/

上一篇：javascript - 如何在 HTML 和 Javascript 的帮助下从浏览器使用 python (Django) 访问我的网络摄像头？

下一篇：python - 无法在 Windows 上安装 opencv-python

Answer 1

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

或者

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