OpenCV 利用hsv颜色空间的车牌底色检测

#include<windows.h>
#include<ctime>
#include <iostream>   
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <opencv2/opencv.hpp> 

using namespace std;  
using namespace cv;
char adr[128]={0};
int main()
{
	Mat hsv;
	Mat imgH ;
	Mat imgS ;
	Mat imgV ;

	for (int i=57;i<=114;i++)
	{
		int bluenum=0;
		int yellownum = 0;
		int whitenum = 0;
		int blacknum = 0;
		int othernum = 0;
		sprintf_s(adr, "C:\\Users\\Administrator\\Desktop\\save\\1 (%d).jpg",i);
		printf("-------------------------------------------------------\n");
		printf("当前图片为%d张\n",i);
	Mat carplate= imread(adr);
	cvtColor(carplate,hsv,CV_BGR2HSV);
	vector<Mat> channels; 
	split(hsv, channels);
	imgH =  channels.at(0); 
	imgS = channels.at(1);
	imgV = channels.at(2);

	for (int i=0;i<hsv.rows;i++)  
	{  
		for(int j=0;j<hsv.cols;j++)  
		{  
			//h通道/-/
			 uchar hvalue=imgH.at<uchar>(i,j);  //
			 //s通道/-/
			 uchar svalue=imgS.at<uchar>(i,j);  //
			 //v通道/-/
			 uchar vvalue=imgV.at<uchar>(i,j);  //
			// printf("x=%d,y=%d,HSV: H=%d,S=%d,V=%d\n",i,j,hvalue,svalue,vvalue);
			 if ((hvalue>90&&hvalue<120)&&(svalue>80&&svalue<220)&&(vvalue>80&&vvalue<255))//hsv图像在蓝色区域里
			 {
				 //蓝色+1
				 bluenum++;
			 }
			else  if ((hvalue>11&&hvalue<34)&&(svalue>43&&svalue<255)&&(vvalue>46&&vvalue<255))//hsv在黄色区域里
			 {
				 //黄色+1
				 yellownum++;
			 }
			else if ((hvalue>0&&hvalue<180)&&(svalue>0&&svalue<255)&&(vvalue>0&&vvalue<46))//hsv在黑色区域里
			 {
				 blacknum++;
				 //黑色+1
			 }
		   else	 if ((hvalue>0&&hvalue<180)&&(svalue>0&&svalue<30)&&(vvalue>46&&vvalue<220))//hsv在白色区域里
			 {
				 //白色+1
				 whitenum++;
			 }
			else
			{
				//其他颜色
				othernum++;
			}
		}
	}
	四个颜色值找最大值//
	if ((bluenum>yellownum)&(bluenum>blacknum)&(bluenum>whitenum)&(bluenum>othernum))
    printf("图%d底色为蓝色\n",i);
	if ((yellownum>whitenum)&(yellownum>blacknum)&(yellownum>bluenum)&(yellownum>othernum))
	printf("图%d底色为黄色\n",i);
	if ((whitenum>yellownum)&(whitenum>blacknum)&(whitenum>bluenum)&(whitenum>othernum))
	printf("图%d底色为白色\n",i);
	if ((blacknum>yellownum)&(blacknum>whitenum)&(blacknum>bluenum)&(blacknum>othernum))
	printf("图%d底色为黑色\n",i);
	if ((othernum>yellownum)&(othernum>whitenum)&(othernum>bluenum)&(othernum>blacknum))
	printf("图%d不是车牌\n",i);

}	
getchar();
	waitKey(0);
	return 0;
}