解码.txt

一种二值图象无损压缩算法 南京理工大学电光学院 【摘 要】利用稀疏矩阵和差分编码对二色图像进行压缩保存

	//0,1矩阵解码
	CFile JFile;
	JFile.Open("test.bmp.j01",CFile::modeRead);

	JFILEHEADER jfh;
	JFile.Read(&jfh,sizeof(JFILEHEADER));
	CString s;
	s.Format("Height = %d pix",jfh.JHeight);
	pDC->TextOut(0,0,s);
	s.Format("Width = %d pix",jfh.JWidth);
	pDC->TextOut(0,20,s);

	int i,j;
	for (i=0;i<jfh.JHeight;i++)
		for (j=0;j<jfh.JWidth;j++)
		{
			BYTE tmp;
			JFile.Read(&tmp,1);
			pDC->SetPixel(j,jfh.JHeight-i+40,RGB(tmp*255,tmp*255,tmp*255));
		}
	JFile.Close();
	
	//坐标压缩解码
	CFile JFile;
	JFile.Open("test.bmp.j",CFile::modeRead);

	JFILEHEADER jfh;
	JFile.Read(&jfh,sizeof(JFILEHEADER));
	CString s;
	s.Format("Height = %d pix",jfh.JHeight);
	pDC->TextOut(0,0,s);
	s.Format("Width = %d pix",jfh.JWidth);
	pDC->TextOut(0,20,s);

	int n;
	for (n=0;n<jfh.JHeight*jfh.JWidth;n++)
	{
		int tmpi,tmpj;
		JFile.Read(&tmpi,sizeof(int));
		JFile.Read(&tmpj,sizeof(int));
		pDC->SetPixel(tmpj,jfh.JHeight-tmpi+40,RGB(0,0,0));
	}
	JFile.Close();

	//差分一维解压
	CFile JFile;
	JFile.Open("test.bmp.j02",CFile::modeRead);

	JFILEHEADER jfh;
	JFile.Read(&jfh,sizeof(JFILEHEADER));
	CString s;
	s.Format("Height = %d pix",jfh.JHeight);
	pDC->TextOut(0,0,s);
	s.Format("Width = %d pix",jfh.JWidth);
	pDC->TextOut(0,20,s);

	int i,j,k=0;
	WORD tmp;
	WORD n=0;
	JFile.Read(&tmp,sizeof(WORD));
	for (i=0;i<jfh.JHeight;i++)
		for (j=0;j<jfh.JWidth;j++)
		{
			if (k%2==1) pDC->SetPixel(j,jfh.JHeight-i+40,RGB(255,255,255));
			else pDC->SetPixel(j,jfh.JHeight-i+40,RGB(0,0,0));
			n++;
			if (n==tmp)
			{
				n=0;
				k++;
				JFile.Read(&tmp,sizeof(WORD));
			}
		}
	JFile.Close();