#include?“stdio.h“
#include?“cv.h“
#include?“highgui.h“
#include?“Math.h“

int?Otsu（IplImage*?src）;

int?main（）
{
	IplImage*?img?=?cvLoadImage（“lena.jpg“0）;//獲取灰度圖像img
	IplImage*?dst?=?cvCreateImage（cvGetSize（img）?8?1）;
	int?threshold?=?Otsu（img）;//調用大津法求出最佳閾值
	printf（“otsu?threshold?=?%d\n“?threshold）;
	cvThreshold（img?dst?threshold?255?CV_THRESH_BINARY）;

	cvNamedWindow（?“img“?1?）;
	cvNamedWindow（?“dst“?1?）;
	cvShowImage（“img“?img）;
	cvShowImage（“dst“?dst）;


	cvWaitKey（-1）;

	cvReleaseImage（&img）;
	cvReleaseImage（&dst）;
	
	cvDestroyWindow（?“img“?）;
	cvDestroyWindow（?“dst“?）;

	return?0;
}

int?Otsu（IplImage*?src）??
{??
	int?height=src->height;??
	int?width=src->width;??????

	//histogram??
	float?histogram[256]?=?{0};??
	for（int?i=0;?i?	{??
		un