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我在使用cv2.solvePnP从 OpenCV 调用的函数时遇到问题。该函数用于获取棋盘的姿态估计。在下面的代码之后,我得到一个错误:

for fname in glob.glob('Images/Calibragem/img1*.jpg'):
    img = cv2.imread(fname)
    gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
    ret, corners = cv2.findChessboardCorners(gray, (9,6), None)

    if ret==True:

        corners2=cv2.cornerSubPix(gray,corners,(11,11),(-1,-1), criteria)

        #finds the vectors of rotation and translation
        ret, rotationVectors, translationVectors, inliers = 
            cv2.solvePnP(objp, corners2, matrix, distortion)
        #projects the 3D points in the image

        imgpts,jac = cv2.projectPoints(axis,rotationVectors,translationVectors,matrix,distortion)

        imgAxis=drawAxis(img,corners2,imgpts)
        cv2.imshow('imgAxis', imgAxis)
        cv2.imwrite('imgAxis.png',imgAxis)

错误说:

ret,rotationVectors,translationVectors,inliers = cv2.solvePnP(objp,corners2,matrix,distortion)ValueError:没有足够的值来解包(预期4,得到3)

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1 回答 1

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opencv2 文档

 Python: cv2.solvePnP(objectPoints, imagePoints, cameraMatrix, distCoeffs[, rvec[, tvec[, useExtrinsicGuess[, flags]]]]) → retval, rvec, tvec¶

所以只有 3 个值需要解压。
所以你应该能够修复:

ret, rotationVectors, translationVectors = 
            cv2.solvePnP(objp, corners2, matrix, distortion)

由于 solvePnP() 只返回retval,rvectvec.

于 2017-09-01T00:57:47.700 回答