初识Opencv4.X----图像色彩空间转换

//图像色彩空间转换
#include <stdio.h>
#include <iostream>
#include <string>
#include <opencv2\opencv.hpp>
using namespace std;
using namespace cv;

int main()
{
    
    
	Mat img,img32f,HSV,gray;
	img = cv::imread("picture.jpeg");
	if (img.empty())
	{
    
    
		cout << "读取图片失败" << endl;
		return -1;
	}
	img.convertTo(img32f, CV_32F, 1.0 / 255);//将8位图像转化为32位图像，采用1/255的转化因子防止越界
	cvtColor(img32f, HSV, COLOR_BGR2HSV);
	cvtColor(img32f, gray, COLOR_BGR2GRAY);
	cv::namedWindow("原图", WINDOW_NORMAL);
	cv::imshow("原图",img32f);
	cv::namedWindow("HSV图", WINDOW_NORMAL);
	cv::imshow("HSV图", HSV);
	cv::namedWindow("GRAY图", WINDOW_NORMAL);
	cv::imshow("GRAY图", gray);
	waitKey(0);
	return 0;
}