opencv逆透视c语言算法,OpenCV4.1.0透视变换的基本操作

C++：透视变换，代码如下：

void contrast() {

VideoCapture capture(0);

Mat frame;

int cap_w = capture.get(CV_CAP_PROP_FRAME_WIDTH);

int cap_h = capture.get(CV_CAP_PROP_FRAME_HEIGHT);

int cx = 531, cy = 125, dx = 531, dy = 389, ax = 95, ay = 120, bx = 85, by = 383;

if (capture.isOpened()) {

while (true) {

capture >> frame;

imshow("frame", frame);

Point2f AffinePoints0[4] = { Point2f(cap_w, 0), Point2f(cap_w, cap_h), Point2f(0, 0), Point2f(0, cap_h) };

Point2f AffinePoints1[4] = { Point2f(ax, ay), Point2f(bx, by), Point2f(cx, cy), Point2f(dx, dy) };

Mat dst_perspective = PerspectiveTrans(frame, AffinePoints0, AffinePoints1);

imshow("dst_perspective", dst_perspective);

Mat dst_perspective_back = PerspectiveTrans(dst_perspective, AffinePoints1, AffinePoints0);

imshow("back", dst_perspective_back);

waitKey(10);

}

}

else {

printf("open failed!\n");

}

}

我这里AffinePoints1的四个点坐标做了左右镜像的效果，可以看到透视变换的操作是可逆的，效果如下：

透视变换具有可逆性