Python 错误:(-215:断言失败)\u src.total();函数'中的0;cv::warpPerspective';
我收到此代码的以下错误:Python 错误:(-215:断言失败)\u src.total();函数'中的0;cv::warpPerspective';,python,python-3.x,opencv,Python,Python 3.x,Opencv,我收到此代码的以下错误: import cv2 import numpy as np img = cv2.imread("images/Back.jpg") width,height = 250,350 pts1 = np.float32([[111,219],[287,188],[154,482],[352,440]]) pts2 = np.float32([[0,0],[width,0],[0,height],[width,height]]) matrix = cv2
import cv2
import numpy as np
img = cv2.imread("images/Back.jpg")
width,height = 250,350
pts1 = np.float32([[111,219],[287,188],[154,482],[352,440]])
pts2 = np.float32([[0,0],[width,0],[0,height],[width,height]])
matrix = cv2.getPerspectiveTransform(pts1,pts2)
imgOutput = cv2.warpPerspective(img,matrix,(width,height))
cv2.imshow("Image", img)
cv2.imshow("Output",imgOutput)
cv2.waitkey(0)
我正试图从鸟瞰的角度看一幅图像。有人能看到我做错了什么,或者我没有做什么吗?一个可能的原因是opencv找不到您试图打开的图像。你不会因为试图打开一个不存在的图像而出错;它将返回一个空数组 但我相信代码中的问题是,您需要重新排列
pts1
中的点,以匹配您构建pts2
的方式。尝试应用此重新排序
功能:
error: (-215:Assertion failed) _src.total() > 0 in function 'cv::warpPerspective'
还要注意,在代码中,您使用了带有小写字母的
k
的cv2.waitkey
。它将给您一个属性错误,因为它应该是cv2.waitKey
,大写k
这是否回答了您的问题?非常感谢。你第一次是对的。代码就是找不到图像,但它现在已正确定位!
import cv2
import numpy as np
def reorder(pts):
pts = np.array(pts).reshape((4, 2))
pts_new = np.zeros((4, 1, 2), np.int32)
add = pts.sum(1)
pts_new[0] = pts[np.argmin(add)]
pts_new[3] = pts[np.argmax(add)]
diff = np.diff(pts, axis=1)
pts_new[1] = pts[np.argmin(diff)]
pts_new[2] = pts[np.argmax(diff)]
return pts_new
width, height = 250, 350
img = cv2.imread("images/Back.jpg")
pts1 = np.float32(reorder([[111, 219], [287, 188], [154, 482], [352, 440]]))
pts2 = np.float32([[0, 0], [width, 0], [0, height], [width, height]])
matrix = cv2.getPerspectiveTransform(pts1, pts2)
imgOutput = cv2.warpPerspective(img, matrix, (width, height))
cv2.imshow("Image", imgOutput)
cv2.waitKey(0)