OpenCV Python 库中的 cv.cornerSubPix 参数
我在使用 OpenCV python 包装器执行以下函数时遇到问题：
img = cv.LoadImage("calib0.jpg")
grayImg = cv.CreateImage((img.width,img.height), img.depth,1)
cv.CvtColor(img,grayImg,cv.CV_BGR2GRAY)
corners = cv.FindChessboardCorners(grayImg,(5,6), cv.CALIB_CB_ADAPTIVE_THRESH + cv.CALIB_CB_NORMALIZE_IMAGE + cv.CALIB_CB_FAST_CHECK )
cv.cornerSubPix(grayImg,corners,(11,11),(-1,-1),(cv.CV_TERMCRIT_ITER | cv.CV_TERMCRIT_EPS, 10, 0.01))
如果我在 (OSX) 上的 iPython 中运行此函数，则会收到以下错误：
TypeError Traceback (most最近的调用最后) /Users/katherinescott/simplecv-git/SimpleCV/sampleimages/ 在 () ----> 1 cv.cornerSubPix(grayImg,corners,(11,11),(-1,-1),(cv.CV_TERMCRIT_ITER | cv.CV_TERMCRIT_EPS, 10, 0.01))
TypeError: 不是
我尝试过的 numpy 数组将上述对象转换为 numpy ndarray 的每一种排列，但都无济于事。我的猜测是这个错误存在于术语标准对象中，但我不知道它要求什么。有其他人在尝试使用 OpenCV Python 包装器执行校准时遇到过这个问题吗？我即将开始深入研究源代码，看看能找到什么。
I am having problems getting the following function to execute using the OpenCV python wrapper:
img = cv.LoadImage("calib0.jpg")
grayImg = cv.CreateImage((img.width,img.height), img.depth,1)
cv.CvtColor(img,grayImg,cv.CV_BGR2GRAY)
corners = cv.FindChessboardCorners(grayImg,(5,6), cv.CALIB_CB_ADAPTIVE_THRESH + cv.CALIB_CB_NORMALIZE_IMAGE + cv.CALIB_CB_FAST_CHECK )
cv.cornerSubPix(grayImg,corners,(11,11),(-1,-1),(cv.CV_TERMCRIT_ITER | cv.CV_TERMCRIT_EPS, 10, 0.01))
If I run this in iPython on (OSX) I get the following error:
TypeError Traceback (most recent call last)
/Users/katherinescott/simplecv-git/SimpleCV/sampleimages/ in ()
----> 1 cv.cornerSubPix(grayImg,corners,(11,11),(-1,-1),(cv.CV_TERMCRIT_ITER | cv.CV_TERMCRIT_EPS, 10, 0.01))
TypeError: is not a numpy array
I've tried just about every permutation of casting the above objects to a numpy ndarray but to no avail. My guess is that this error lives in the term criteria object, but I am at a loss as to what it is asking for. Has anyone else encountered this problem when trying to perform calibration using the OpenCV Python wrappers? I am about to start digging into the source to see what I can find.
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cornerSubPix 以小写字母开头，是 OpenCV python 包装器的模块内部函数。
我相信你想要 cv.FindCornerSubPix：
http://opencv.willowgarage.com/documentation /python/imgproc_feature_detection.html#findcornersubpix
cornerSubPix, having a lowercase letter first, is a module-internal function for the OpenCV python wrapper.
I believe you want cv.FindCornerSubPix:
http://opencv.willowgarage.com/documentation/python/imgproc_feature_detection.html#findcornersubpix
老问题，但我相信
cv.cornerSubPix()中的winSize参数可能存在一些误解。使用时
假设您需要 11x11 搜索窗口，则
winSize的适当输入应为winSize=(5,5)而不是winSize=(11,11)。如果您使用 (11,11) 作为winSize（如原始问题中发布的那样），则生成的搜索窗口实际上是 23x23。根据文档：
从 OpenCV 4.5.2（2021 年 4 月）开始，相关
cv.findChessboardCorners()下文档中的示例似乎不正确，应改用 winSize 的 (5,5)。Old question, but I believe there may be some misunderstanding with the
winSizeparameter incv.cornerSubPix().When using
Assuming you want an 11x11 search window, the appropriate input for
winSizeshould bewinSize=(5,5)and notwinSize=(11,11). If you use (11,11) forwinSizeas posted in the original question, the resulting search window would actually be 23x23.According to the documentation:
As of OpenCV 4.5.2 (April 2021), the example in the documentation under related
cv.findChessboardCorners()appears to be incorrect and (5,5) for winSize should be used instead.