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把书上代码中的 cvCopyImage 函数改为 cvCopy 函数
代码:
#include <iostream>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <opencv/cv.h>
using namespace std;
using namespace cv;
CvRect box;
bool drawing_box = false;
void draw_box(IplImage* img, CvRect rect)
{
cvRectangle(
img,
cvPoint(box.x, box.y),
cvPoint(box.x + box.width, box.y + box.height),
cvScalar(0xff, 0x00, 0x00)
);
}
void my_mouse_callback(int event, int x, int y, int flags, void* param)
{
IplImage* image = (IplImage*) param;
switch(event)
{
case CV_EVENT_MOUSEMOVE:
{
if (drawing_box)
{
box.width = x - box.x;
box.height = y - box.y;
}
}
break;
case CV_EVENT_LBUTTONDOWN:
{
drawing_box = true;
box = CvRect(x, y, 0, 0);
}
break;
case CV_EVENT_LBUTTONUP:
{
drawing_box = false;
if (box.width < 0)
{
box.x += box.width;
box.width *= -1;
}
if (box.height < 0)
{
box.y += box.height;
box.height *= -1;
}
draw_box(image, box);
}
break;
}
}
int main(int argc, char* argv[])
{
box = CvRect(-1, -1, 0, 0);
IplImage* image = cvCreateImage(cvSize(200, 200), IPL_DEPTH_8U, 3);
cvZero(image);
IplImage* temp = cvCloneImage(image);
cvNamedWindow("Box Example");
cvSetMouseCallback(
"Box Example",
my_mouse_callback,
(void*) image
);
while(1)
{
cvCopy(image, temp);
if (drawing_box)
{
draw_box(temp, box);
}
cvShowImage("Box Example", temp);
if (cvWaitKey(15) == 27)
{
break;
}
}
cvReleaseImage(&image);
cvReleaseImage(&temp);
cvDestroyWindow("Box Example");
return 0;
}