OpenCV 学习

#include <opencv2opencv.hpp>
#include <iostream>
#include <opencv2highguihighgui.hpp>
#include <Windows.h>
using namespace std;
using namespace cv;

const int Silder_Max = 64;
int Silder;
Mat Image;
Mat Result;
BOOL bLBtnDown = FALSE;
BOOL bLBtnUp = FALSE;
Point Corner1, Corner2;
Rect box;
VOID ColorReduce(Mat& InputImage, Mat& OutputImage, int div,int Func);
static VOID Mouse_CallBack(int Event, int x, int y, int, VOID*);
VOID On_TrackBar(int Pos,VOID*);
VOID Sub_1();
int main()
{
    //    Mat picture = imread("1.jpg");//图片必须添加到工程目录下
    //                                          //也就是和test.cpp文件放在一个文件夹下！！！
    //    imshow("测试程序", picture);
    //    waitKey(20150901);
    //}
    Image = imread("3.jpg");
    namedWindow("原图像");
    namedWindow("显示结果");
    namedWindow("Cropping app");
    Silder = 0;
    createTrackbar("ColorReduce", "显示结果", &Silder, Silder_Max, On_TrackBar);
    setMouseCallback("原图像", Mouse_CallBack);
    imshow("原图像", Image);
    imshow("显示结果", Image);
    waitKey(0);
}

#pragma region 鼠标事件回调

static VOID Mouse_CallBack(int Event, int x, int y, int, VOID*)
{
    if (Event == EVENT_LBUTTONDOWN)
    {
        bLBtnDown = TRUE;
        Corner1.x = x;
        Corner1.y = y;
        cout << Corner1 << endl;
    }
    if (Event == EVENT_LBUTTONUP)
    {
        if (abs(x - Corner1.x) > 20 && abs(y - Corner1.y) > 20)
        {
            bLBtnUp = TRUE;
            Corner2.x = x;
            Corner2.y = y;
            cout << Corner2 << endl;
        }
        else
        {
            bLBtnDown = FALSE;
        }
    }
    if (bLBtnDown == TRUE && bLBtnUp == FALSE)
    {
        Point pt;
        pt.x = x;
        pt.y = y;
        Mat Local_Image = Image.clone();
        rectangle(Local_Image, Corner1, pt, Scalar(0, 0, 255));

        imshow("Cropping app", Local_Image);
    }
    if (bLBtnDown == TRUE && bLBtnUp == TRUE)
    {
        box.width = abs(Corner1.x - Corner2.x);
        box.height = abs(Corner1.y - Corner2.y);
        box.x = min(Corner1.x, Corner2.x);
        box.y = min(Corner1.y, Corner2.y);
        Mat crop(Image, box);
        Mat Temp;
        ColorReduce(crop, Temp, 0, 1);
        namedWindow("Crop");
        imshow("Crop", Temp);
        bLBtnDown = FALSE;
        bLBtnUp = FALSE;

    }
}


#pragma endregion
#pragma region 滑竿空间操作
VOID On_TrackBar(int Pos, VOID*)
{
    if (Pos <= 0)
    {
        Result = Image;
    }
    else
    {
        ColorReduce(Image, Result, Pos, 0);
    }
    imshow("显示结果", Result);
}
#pragma endregion

#pragma region 色素操作

VOID ColorReduce(Mat& InputImage, Mat& OutputImage, int div, int Func)
{

    if (Func == 0)
    {
        OutputImage = InputImage.clone();
        int Rows = OutputImage.rows;
        int Cols = OutputImage.cols * OutputImage.channels();
        if (OutputImage.isContinuous())
        {
            Cols *= Rows;
            Rows = 1;
        }
        for (int i = 0;i < Rows;i++)
        {
            UCHAR* Data = InputImage.ptr<UCHAR>(i);
            UCHAR* DataOut = OutputImage.ptr<UCHAR>(i);
            for (int j = 0;j < Cols;j++)
            {
                Data[j] = DataOut[j] / div*div + div / 2;
            }
        }
    }
    else
    {
        OutputImage = InputImage.clone();
        int Rows = OutputImage.rows;
        int Cols = OutputImage.cols;
        for (int i = 0;i < Rows;i++)
        {
            for (int j = 0;j < Cols;j++)
            {
                OutputImage.at<Vec3b>(i, j)[0] = 255 - OutputImage.at<Vec3b>(i, j)[0];
                OutputImage.at<Vec3b>(i, j)[1] = 255 - OutputImage.at<Vec3b>(i, j)[1];
                OutputImage.at<Vec3b>(i, j)[2] = 255 - OutputImage.at<Vec3b>(i, j)[2];

            }
        }
    }

}
#pragma endregion

VOID Sub_1()
{


    Mat Image, Result;
    cout << "Size: " << Image.size().height << "," << Image.size().width << endl;
    Image = imread("1.jpg");
    if (!Image.data)
    {

        cout << "Read Data Failed" << endl;
    }
    namedWindow("Ortginal Image");
    imshow("Ortginal Image", Image);
    flip(Image, Result, 1);
    namedWindow("Output Image");
    imshow("Output Image", Result);
    waitKey(0);
}