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소스코드


 
#include <opencv\cv.h>
#include <opencv\highgui.h>

#define Width	780
#define Height	1024

struct stMap{

	unsigned char r;
	unsigned char g;
	unsigned char b;

} Map[Height][Width];


void Img2Aray(IplImage* img)
{

	for (int i = 0; i<img->height; i++){
		for (int j = 0; j<img->width; j++){

			Map[i][j].r = img->imageData[i*img->widthStep + j*img->nChannels + 2];
			Map[i][j].g = img->imageData[i*img->widthStep + j*img->nChannels + 1];
			Map[i][j].b = img->imageData[i*img->widthStep + j*img->nChannels + 0];

		}
	}
}

int AutoThreshold(IplImage* img)
{
	unsigned char t = 128;
	unsigned char min = 255, max = 0;
	unsigned char p;

	for (int i = 0; i<img->height; i += 2){
		for (int j = 0; j<img->width; j += 2){
			p = img->imageData[i*img->widthStep + j];

			min = (min > p) ? p : min;
			max = (max < p) ? p : max;

		}
	}

	t = (min + max) / 2;

	return t;
}

IplImage* contour(IplImage* img)
{
	int di[8] = { -1, -1, -1, 0, 0, 1, 1, 1 },
		dj[8] = { -1, 0, 1, -1, 1, -1, 0, 1 };

	int mask[3][3] = { { -1, -1, -1 },
	{ -1, 8, -1 },
	{ -1, -1, -1 } };

	int p;
	Img2Aray(img);

	for (int i = 1; i<img->height - 1; i++){
		for (int j = 1; j<img->width - 1; j++){
			p = Map[i][j].r;
			p *= mask[1][1];

			for (int k = 0; k<8; k++){
				p = p + ((unsigned char)Map[i + di[k]][j + dj[k]].r * mask[1 + di[k]][1 + dj[k]]);
			}

			if (p > 255)		p = 255;
			else if (p < 0)	p = 0;

			img->imageData[i*img->widthStep + j] = (unsigned char)p;
		}
	}

	/*	for(int i=1; i<img->height-1; i++){
	for(int j=1; j<img->width-1; j++){

	p = (unsigned char)img->imageData[i*img->widthStep + j ];
	p *= mask[1][1];
	img->imageData[i*img->widthStep + j ] = (unsigned char)p;

	for(int k=0; k<8; k++){
	if(i+di[k] >= 0 && i+di[k] <= img->height &&
	j+dj[k] >=0 && j+dj[k] <= img->width){

	p = p + ((unsigned char)img->imageData[(i+di[k])*img->widthStep + (j+dj[k]) ] * mask[1+di[k]][1+dj[k]]);
	}
	}

	if(p > 255)		p = 255;
	else if(p < 0)	p = 0;

	img->imageData[i*img->widthStep + j ] = (unsigned char)p;
	}
	}*/

	return img;

}

void main()
{
	int i, threshold = 128; // 임계값(Threshold) 설정

	IplImage* img = 0;
	IplImage* output = 0;
	IplImage* gray = 0;

	CvCapture* capture = cvCaptureFromCAM(0); // 카메라 연결

	cvNamedWindow("T9-camera", 1); // 원본 영상을 띄울 윈도우
	cvNamedWindow("T9-output", 1); // 결과 영상을 띄울 윈도우

	while (1) {
		cvGrabFrame(capture);
		img = cvRetrieveFrame(capture);
		cvShowImage("T9-camera", img);

		if (!output){
			gray = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1); // 흑백 이미지 생성
			output = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1); // 출력할 흑백 이미지 생성
		}

		cvCvtColor(img, gray, CV_RGB2GRAY); // 컬러를 흑백으로 변환

		if (cvWaitKey(10) >= 0)
			break;

		threshold = AutoThreshold(gray); // 자동 이진화

		cvThreshold(gray, output, threshold, 255, CV_THRESH_BINARY); // 영상의 각 픽셀(x,y) 값이 threshold 값의 초과는 255 로, 그 이하는 0 으로 변환

		output = contour(output);
		output->origin = img->origin; // 방향이 뒤집어 진것을 바로 잡아줌

		cvShowImage("T9-output", output);
	}

	cvReleaseImage(&gray);
	cvReleaseImage(&output);
	cvReleaseCapture(&capture);
	cvDestroyWindow("T9-output");
	cvDestroyWindow("T9-camera");
}





실행결과














출처 : http://cafe.naver.com/opencv/11896




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