1.各种颜色空间的介绍

1.颜色空间的相互转换cvtColor()

#include <opencv2\opencv.hpp>
#include <iostream>
#include <vector>
using namespace std;
using namespace cv;
int main()
{
    Mat img = imread("lena.png");
    if (img.empty())
    {
        cout << "请确认图像文件名称是否正确" << endl;
        return -1;
    }
    Mat gray, HSV, YUV, Lab, img32;
    img.convertTo(img32, CV_32F, 1.0 / 255);  //将CV_8U类型转换成CV_32F类型
                                              //img32.convertTo(img, CV_8U, 255);  //将CV_32F类型转换成CV_8U类型
    cvtColor(img32, HSV, COLOR_BGR2HSV);
    cvtColor(img32, YUV, COLOR_BGR2YUV);
    cvtColor(img32, Lab, COLOR_BGR2Lab);
    cvtColor(img32, gray, COLOR_BGR2GRAY);
    imshow("原图", img32);
    imshow("HSV", HSV);
    imshow("YUV", YUV);
    imshow("Lab", Lab);
    imshow("gray", gray);
    waitKey(0);
    return 0;
}

2.