去除邊框防止粘連 ClearResidualBorder

<!-- lang: cpp -->
void ClearResidualBorder(IplImage* img_bw)

{ int i,j,t; int left,right; int height = img_bw->height; int width = img_bw->width; int* hisHor = histogramVH(img_bw,1); for(i=0;i<width;i++) { CV_IMAGE_ELEM(img_bw,uchar,0,i) = 0; CV_IMAGE_ELEM(img_bw,uchar,1,i) = 0;

CV_IMAGE_ELEM(img_bw,uchar,height-1,i) = 0;
	CV_IMAGE_ELEM(img_bw,uchar,height-2,i) = 0;
}
for(i=0;i<height;i++)
{
	CV_IMAGE_ELEM(img_bw,uchar,i,0) = 0;
	CV_IMAGE_ELEM(img_bw,uchar,i,1) = 0;

	CV_IMAGE_ELEM(img_bw,uchar,i,width-1) = 0;
	CV_IMAGE_ELEM(img_bw,uchar,i,width-2) = 0;
}
//水平濾波
for(i=0;i<height;i++)
{
	left = -1;
	for(j=0;j<width;j++)
	{
		if(CV_IMAGE_ELEM(img_bw,uchar,i,j) == 255)
		{
			if(left == -1)
			{
				left = j;
				right = j;
			}
			else
			{
				right++;
			}
		}
		else
		{
			if(left != -1)
			{
				if(right - left > width*0.2)
				{
					for(t=left;t<right;t++)
					{
						CV_IMAGE_ELEM(img_bw,uchar,i,t) = 0;
					}
				}
				left = -1;
			}
		}
	}
}
//豎直濾波
for(i=0;i<width;i++)
{
	left = -1;
	for(j=1;j<height-1;j++)
	{
		if(CV_IMAGE_ELEM(img_bw,uchar,j,i) == 255
			&& CV_IMAGE_ELEM(img_bw,uchar,j-1,i) == 0
			&& CV_IMAGE_ELEM(img_bw,uchar,j+1,i) == 0)
		{
			CV_IMAGE_ELEM(img_bw,uchar,j,i) = 0;
		}
	}
}

for(i = 0;i<img_bw->width/2;i++)
{
	if(hisHor[i] > img_bw->height*0.92)
	{
		for(j=0;j<img_bw->height;j++)
			CV_IMAGE_ELEM(img_bw,uchar,j,i)=0;

	}
	else
		break;
}
for(i = img_bw->width-1;i>img_bw->width/2;i--)
{
	if(hisHor[i] > img_bw->height*0.92)
	{
		for(j=0;j<img_bw->height;j++)
			CV_IMAGE_ELEM(img_bw,uchar,j,i)=0;

	}
	else
		break;
}
/*for(i=1;i<height-1;i++)
{
for(j=0;j<width;j++)
{
if(CV_IMAGE_ELEM(img_bw,uchar,i,j) == 255)
{
if(CV_IMAGE_ELEM(img_bw,uchar,i-1,j) == 0 &&
CV_IMAGE_ELEM(img_bw,uchar,i+1,j) == 0)
CV_IMAGE_ELEM(img_bw,uchar,i,j) = 0;
}
}
}*/
free(hisHor);

}