没有这样的文件或目录：“B.npz”正在编译“pose”_估算.py'使用“打开”绘制三维立方体

Question

我想用Opencv和python在棋盘的第一个角上绘制3D坐标轴（X、Y、Z轴）。在

但当我运行下面的代码时

import cv2
import numpy as np
import glob

def draw(img, corners, imgpts):
    corner = tuple(corners[0].ravel())
    img = cv2.line(img, corner, tuple(imgpts[0].ravel()), (255,0,0), 5)
    img = cv2.line(img, corner, tuple(imgpts[1].ravel()), (0,255,0), 5)
    img = cv2.line(img, corner, tuple(imgpts[2].ravel()), (0,0,255), 5)
    return img

# Load previously saved data
with np.load('B.npz') as X:
    mtx, dist, _, _ = [X[i] for i in ('mtx','dist','rvecs','tvecs')]

criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)
objp = np.zeros((6*7,3), np.float32)
objp[:,:2] = np.mgrid[0:7,0:6].T.reshape(-1,2)

axis = np.float32([[3,0,0], [0,3,0], [0,0,-3]]).reshape(-1,3)

for fname in glob.glob('left*.jpg'):
    img = cv2.imread(fname)
    gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
    ret, corners = cv2.findChessboardCorners(gray, (7,6),None)

    if ret == True:
        corners2 = cv2.cornerSubPix(gray,corners,(11,11),(-1,-1),criteria)

        # Find the rotation and translation vectors.
        rvecs, tvecs, inliers = cv2.solvePnPRansac(objp, corners2, mtx, dist)

        # project 3D points to image plane
        imgpts, jac = cv2.projectPoints(axis, rvecs, tvecs, mtx, dist)

        img = draw(img,corners2,imgpts)
        cv2.imshow('img',img)
        k = cv2.waitKey(0) & 0xff
        if k == 's':
            cv2.imwrite(fname[:6]+'.png', img)

cv2.destroyAllWindows()

我得到了这个错误：

^{pr2}$

帮我克服这个问题。非常感谢。在

Answer 1

我也在为此挣扎。不同的是，我使用的是另一幅图像，而不是棋盘，但我有相机的内部和外部参数。我想用opencvpython在我的图像上绘制3D轴。我能知道参考号或代码吗？谢谢

Answer 2

与np.负荷（'B.npz'）作为X:在这一行中，您试图加载B.npz。它在这个位置找不到那个文件指定。品牌请务必将fie放置在指定位置。在