opencv剪切图片

debug模式下：

包含include和lib

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<LinkIncremental>true</LinkIncremental>
<IncludePath>$(O2_3RD)\opencv\include;$(IncludePath)</IncludePath>
<LibraryPath>$(O2_3RD)\opencv\x64\vc11\lib;$(LibraryPath)</LibraryPath>
</PropertyGroup>

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

IplImage* org = 0;
IplImage* img = 0;
IplImage* tmp = 0;
IplImage* dst = 0;
void on_mouse(int event, int x, int y, int flags, void* ustc)
{
    static CvPoint pre_pt = { -1,-1 };
    static CvPoint cur_pt = { -1,-1 };
    CvFont font;
    cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);
    char temp[16];

    if (event == CV_EVENT_LBUTTONDOWN)
    {
        cvCopy(org, img);
        sprintf(temp, "(%d,%d)", x, y);
        pre_pt = cvPoint(x, y);
        cvPutText(img, temp, pre_pt, &font, cvScalar(0, 0, 0, 255));
        cvCircle(img, pre_pt, 3, cvScalar(255, 0, 0, 0), CV_FILLED, CV_AA, 0);
        cvShowImage("img", img);
        cvCopy(img, tmp);
    }
    else if (event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))
    {
        cvCopy(tmp, img);
        sprintf(temp, "(%d,%d)", x, y);
        cur_pt = cvPoint(x, y);
        cvPutText(img, temp, cur_pt, &font, cvScalar(0, 0, 0, 255));
        cvShowImage("img", img);
    }
    else if (event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))
    {
        cvCopy(tmp, img);
        sprintf(temp, "(%d,%d)", x, y);
        cur_pt = cvPoint(x, y);
        cvPutText(img, temp, cur_pt, &font, cvScalar(0, 0, 0, 255));
        cvRectangle(img, pre_pt, cur_pt, cvScalar(0, 255, 0, 0), 1, 8, 0);
        cvShowImage("img", img);
    }
    else if (event == CV_EVENT_LBUTTONUP)
    {
        cvCopy(tmp, img);
        sprintf(temp, "(%d,%d)", x, y);
        cur_pt = cvPoint(x, y);
        cvPutText(img, temp, cur_pt, &font, cvScalar(0, 0, 0, 255));
        cvCircle(img, cur_pt, 3, cvScalar(255, 0, 0, 0), CV_FILLED, CV_AA, 0);
        cvRectangle(img, pre_pt, cur_pt, cvScalar(0, 255, 0, 0), 1, 8, 0);
        cvShowImage("img", img);
        cvCopy(img, tmp);
        int width = abs(pre_pt.x - cur_pt.x);
        int height = abs(pre_pt.y - cur_pt.y);
        if (width == 0 || height == 0)
        {
            cvDestroyWindow("dst");
            return;
        }
        dst = cvCreateImage(cvSize(width, height), org->depth, org->nChannels);
        CvRect rect;
        if (pre_pt.x < cur_pt.x && pre_pt.y < cur_pt.y)
        {
            rect = cvRect(pre_pt.x, pre_pt.y, width, height);
        }
        else if (pre_pt.x > cur_pt.x && pre_pt.y < cur_pt.y)
        {
            rect = cvRect(cur_pt.x, pre_pt.y, width, height);
        }
        else if (pre_pt.x > cur_pt.x && pre_pt.y > cur_pt.y)
        {
            rect = cvRect(cur_pt.x, cur_pt.y, width, height);
        }
        else if (pre_pt.x<cur_pt.x && pre_pt.y>cur_pt.y)
        {
            rect = cvRect(pre_pt.x, cur_pt.y, width, height);
        }
        cvSetImageROI(org, rect);
        cvCopy(org, dst);
        cvResetImageROI(org);
        cvDestroyWindow("dst");
        cvNamedWindow("dst", 1);
        cvShowImage("dst", dst);
        cvWaitKey(0);
        cvSaveImage("D:\\71253.jpg", dst);
    }
}

void CDlgXXXX::OnStnClickedStaticPic()
{
    CString strTxtImg_ = L"D:\\Picture1.jpg";
    string szTxtImg = CStringFun::wstring_to_string(strTxtImg_.GetBuffer());
    strTxtImg_.ReleaseBuffer();
    org = cvLoadImage("D:\\Picture1.jpg", 1);
    img = cvCloneImage(org);
    tmp = cvCloneImage(org);
    cvNamedWindow("img", 1);
    CRect rtPic;
    m_static_image_.GetWindowRect(&rtPic);
    cvMoveWindow("img", rtPic.left, rtPic.top);
    cvResizeWindow("img", rtPic.Width(), rtPic.Height());

    cvSetMouseCallback("img", on_mouse, 0);
    cvShowImage("img", img);
    
    cvWaitKey(0);
    cvDestroyAllWindows();
    cvReleaseImage(&org);
    cvReleaseImage(&img);
    cvReleaseImage(&tmp);
    cvReleaseImage(&dst);
}