[人工智能]毛星云opencv之9.4.7反向投影及其函数和综合程序

#include <opencv2/opencv.hpp>
#include<opencv2/core/core.hpp>
#include"opencv2/highgui/highgui.hpp"
#include<opencv2/imgproc/imgproc.hpp>
#include<iostream>
#include<time.h>
#include<vector>
using namespace std;
using namespace cv;

#define WINDOW_NAME1 "[原始图]"

Mat g_srcImage;
Mat g_hsvImage;
Mat g_hueImage;
int g_bins = 30;

void on_BinChange(int, void*);

int main()
{
	
	g_srcImage = imread("C:/Users/离子键/source/repos/Project8/1.jpg");

	cvtColor(g_srcImage, g_hsvImage, COLOR_BGR2HSV);

	g_hueImage.create(g_hsvImage.size(), g_hsvImage.depth());
	int ch[] = { 0,0 };
	mixChannels(&g_hsvImage,1,&g_hueImage,1,ch,1);

	namedWindow(WINDOW_NAME1,WINDOW_AUTOSIZE);
	createTrackbar("色调组距",WINDOW_NAME1,&g_bins,180,on_BinChange);
	on_BinChange(0, 0);


	imshow(WINDOW_NAME1, g_srcImage);
	

	waitKey();
	return 0;
}

void on_BinChange(int, void*)
{
	MatND hist;
	int histSize = MAX(g_bins,2);
	float hue_range[] = {0,180};
	const float* ranges = {hue_range};

	calcHist(&g_hueImage,1,0,Mat(),hist,1,&histSize,&ranges,true,false);
	normalize(hist,hist,0,255,NORM_MINMAX,-1,Mat());

	MatND backproj;

	calcBackProject(&g_hueImage,1,0,hist,backproj,&ranges,1,true);

	imshow("反向投影",backproj);

	int w = 400, h = 400;
	int bin_w = cvRound((double)w/histSize);
	

	Mat histImg = Mat::zeros(w, h, CV_8UC3);

	for (int i = 0; i < g_bins; i++)
	{
		rectangle(histImg, Point(i * bin_w, h), Point((i + 1) * bin_w, h - cvRound(hist.at<float>(i) * h / 255.0)), Scalar(100, 123, 255), -1);
		imshow("直方图",histImg);
	}
}

运行结果如图：

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