[人工智能]OpenCV入门（二）：图像色彩空间转换与图像保存

为方便不同入门例子的说明，新增以下例子类：

class OpencvExample
{
public:
	void Example_ColorSpace(Mat &image);

private:

};

//example.h
#pragma once
#include <opencv2/opencv.hpp>

using namespace cv;

class OpencvExample
{
public:
	void Example_ColorSpace(Mat &image);

private:

};

//example.cpp
#include "example.h"

void OpencvExample::Example_ColorSpace(Mat &image)
{
	Mat gray, hsv;

	cvtColor(image,hsv,COLOR_BGR2HSV);//颜色空间转换
	cvtColor(image,gray,COLOR_BGR2GRAY);

	imshow("HSV", hsv);
	imshow("灰度", gray);
	imwrite("E:/test/opencvexample/tmp/hsv.png", hsv); //保存图片
	imwrite("E:/test/opencvexample/tmp/gray.png", gray);
}

//main.cpp
#include <opencv2/opencv.hpp>
#include <iostream>
#include "example.h"

using namespace cv;
using namespace std;

int main()
{
	Mat src = imread("D:/images/gender.jpg");
	OpencvExample classExample;
	if (src.empty())
	{
		printf("Can't load image\n");
		return -1;
	}

	namedWindow("InPut", WINDOW_FREERATIO);
	imshow("InPut", src);
	
	classExample.Example_ColorSpace(src);//颜色空间转换并保存转换后图像

	waitKey(0);  //单位毫秒 0无限制阻塞
	destroyAllWindows();
}