當我使用findContours處理opencv中的圖像時發生錯誤

我正在嘗試使用opencv處理圖像。這裏是我的測試代碼。當我使用findContours處理opencv中的圖像時發生錯誤

import numpy as np 
import cv2 
im = cv2.imread('keli.jpg') 
imgray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY) 

thresh = cv2.adaptiveThreshold(im,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY,7,2) 

contours,hierarchy = cv2.findContours(thresh,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE) 
img = cv2.drawContours(im, contours, -1, (0,255,0), 1) 

cv2.imwrite("result.jpg",img)

這裏是錯誤

OpenCV Error: Assertion failed (src.type() == CV_8UC1) in adaptiveThreshold, file /build/buildd/opencv-2.4.8+dfsg1/modules/imgproc/src/thresh.cpp, line 796 
Traceback (most recent call last): 
    File "contour.py", line 6, in <module> 
    thresh = cv2.adaptiveThreshold(im,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY,7,2) 
cv2.error: /build/buildd/opencv-2.4.8+dfsg1/modules/imgproc/src/thresh.cpp:796: error: (-215) src.type() == CV_8UC1 in function adaptiveThreshold

我怎樣才能解決這個問題。

來源

2015-11-02 Elivis

你看到[這個以前的問題（http://stackoverflow.com/questions/27014207/failure-使用的-adaptivethreshold）？ – Delgan

adaptiveThreshold需要一個CV_8UC1（灰度）圖像，所以只是通過imgray而不是im：

thresh = cv2.adaptiveThreshold(imgray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 7, 2)

來源

2015-11-02 12:13:37 Miki

當我使用findContours處理opencv中的圖像時發生錯誤

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