CN1539129A - 具有伽玛调整及自适应滤波的子像素着色方法及*** - Google Patents
具有伽玛调整及自适应滤波的子像素着色方法及*** Download PDFInfo
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Abstract
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//************* //子像素着色程序 static long BlueSum=0;//来自红色及绿色的总和,保存为蓝色 unsigned char CalcSubP(BITMAPINFOHEADER*ib,int x,int y,int ox,int oy) { long sum=0,cent,inner=0,edge,term; long wcent,bwcent,wedge; //欧米伽校正的像素值 int i,j; //来自子像素地址的颜色分量 int color=((ox&1)^(oy&1))?GREEN:RED; unsigned short*pre=color==RED?precomp:precomp+256; unsigned short*wgm=color==RED?wtable:wtable+256; //指向滤波器的指针 unsigned char *myf=flits+(((ox%S)+ (oy%S)*S))*RGXsize*RGYsize; unsigned long ccoef;//储存中心系数 //利用蓝色总和递归欧米伽代码 //提取该中央输入像素并保持它一段时间 cent=PIX(x+1,y+1,color); wcent=wgm[cent]>>8; //仅使用8比特的欧米伽 bwcent=wtable[512+PIX(x+1,y+1,BLUE)]>>8;//查询蓝色欧米伽中央值 inner=0; //计算所有项 for(j=0;j<RGYsize;j++) { for(i=0;i<RGXsize;i++) { <dp n="d73"/> switch((i<<4)j) //对于所有特定的情况将坐标在一起 { case 0×00: //边角像素项 case 0×20: case 0×02: case 0×22: edge=PIx(x+i,y+j,color); //输入像素永远为8位 wedge=wgm[edge]>>8; //在查询欧米伽之后 //其为16,退回8,现在其为8位 //边角像素及中心像素仍为9位 term=(wedge+wcent)/2; //在该预运算表中检视该平均,使其为16位 term=pre[term]; //乘以该滤波器系数,必须使结果为24位 //但是,我们使用乘法器的第一排来给出一16位结果 //内部除以256(或不计算低8位) term=(term*(unsigned long)(*myf++))>>8; //然后在乘法器的第二排中,我们乘以该伽玛校正项 //与该未伽玛校正的输入值此可有效地加1 //到该伽玛项的指数 term=(term*edge)>>8; //因为该项乘以 //系数而求和为1,此总和永远可匹配于16位 sum+=term; break; case 0×10: //正交边缘像素项 case 0×01: case 0×21: case 0×12: <dp n="d74"/> edge=PIX(x+i,y+j,BLUE);//得到相同的蓝色像素 wedge=wtable[512+edge]>>8;//将其执行该蓝色欧米伽 //表 term=(wedge+bwcent)/2;//平均化,其中央蓝色项 term=precomp[512+term];//然后在GinvWinv表中查询 //表 BlueSum+=tern;//求和,并稍后储存给蓝色计算用 edge=pIX(x+i,y+j,color);//输入像素永远为8位 wedge=wgm[edge]>>8;//在欧米伽中查询之后,其为16 //退回8,现在其为8位 //一边缘像素及该中央像素的平均仍为9位 term=(wedge+wcent)/2; //在该预先运算表中查询该平均,使其为16位 term=pre[term]; //这些边缘项系求和来计算该中央项 //此将必须为一18位数目,来保持这些求和为4 inner+=term; //求和该边缘来在稍后计算该中央项 //乘以该滤波器系数,其必须使该结果为24位 //但是,我们使用乘法器的第一库来得到一16位的结果 //内部除以256(或不计算该低的8位) term=(term*(unsigned long)(*myf++))>>8; //然后在乘法器的第二库中,我们乘以该伽玛校正项 //与该未伽玛校正的输入值此可有效地加1 //到该伽玛项的指数 term=(term*edge)>>8; //因为该项乘以 //系数求和到1,此总和可永远符合在16位 sum+=term; break; <dp n="d75"/> case 0×11://中央像素 ccoef=(long)(*myf++);//仅取用该中央系数来在稍后 中断; } } } inner>>=2;//该4个内项的总和除以4来得到该16位平均 inner=(inner*ccoef)>>8;//然后其乘以该中央系数 sum+=(inner*cent)>>8;//最后乘以该中央值,完成该滤波器的外部总和if(sharpen) { if(color==RED)//切换到该交叉颜色 color=GREEN; else color=RED; //现在锐化永远为非伽玛校正的数值所完成 //所以,除了不考虑精度,我们可大致保持 //因为我们将数目由8位变为11位 //在除以该锐化系数(1/8及1/32) //中央*256来得到16位,然后乘以1/8 sum+=PIX(x+1,y+1,color)*32; //角落项为*256,然后/32,得到*8 sum=PIX(x,y+2,color)*8; sum=PIX(x+2,y+2,color)*8; sum=PIX(x+2,y,color)*8; sum=max(x,y,color)*8; sum=max(0,sum);//锐化可造成负数 sum=min(sum,ginmask);//或大于8位的数目 } <dp n="d76"/> if(color==RED) sum=gama[sum];//使用该11位数目来查询输出伽玛 else sum=gamat[sum+goutdiv];//红色使用一可能不同的表格 retum((unsigned char)(sum));//传回子像素值 } //计算该蓝色数值的程序 unsigned char BlueFilter(BITMAPINFOHEADER*ib,int x,int y,int ox,int oy) { long sum=0; long tem1,tem2;//诊断变量 unsigned char *myf; int i,j; //循环计数器 myf=bfilts+(((ox%S)+(oy%S)*S))*BlueXsize*BlueYsize; BlueSum>>=3;//采取所有那些蓝色总和的平均 //此使得蓝色总和再次为16位数目 for(j=0;j<BlueYsize;j++) { for(i=0;i<BlueXsize;i++) { tem1=PIX(x+i,y+j,BLUE);//提出该蓝色像素 tem2=(tem1**myf++)>>8;//8*16=16乘以系数 tem1=(tem2*BlueSum)>>8;//相同于递归总和值 sum+=tem1; } } BlueSum=0;//将其初始化来进行下一个蓝色 sum=(sum*goutdiv)/(ginmask+1); sum=gamat[sum+goutdiv*2]; retum((unsigned char)(sum));//传回蓝色超级像素值
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US10/051,612 US7123277B2 (en) | 2001-05-09 | 2002-01-16 | Conversion of a sub-pixel format data to another sub-pixel data format |
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US10/150,355 US7221381B2 (en) | 2001-05-09 | 2002-05-17 | Methods and systems for sub-pixel rendering with gamma adjustment |
PCT/US2002/024994 WO2003015066A2 (en) | 2001-08-08 | 2002-08-08 | Methods and systems for sub-pixel rendering with gamma adjustment and adaptive filtering |
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EP1417666A2 (en) | 2004-05-12 |
JP2004538523A (ja) | 2004-12-24 |
EP2378506A2 (en) | 2011-10-19 |
US7755649B2 (en) | 2010-07-13 |
US7911487B2 (en) | 2011-03-22 |
US20030103058A1 (en) | 2003-06-05 |
WO2003015066A2 (en) | 2003-02-20 |
US8159511B2 (en) | 2012-04-17 |
AU2002326546A1 (en) | 2003-02-24 |
JP4494014B2 (ja) | 2010-06-30 |
US8830275B2 (en) | 2014-09-09 |
US7221381B2 (en) | 2007-05-22 |
US20070206013A1 (en) | 2007-09-06 |
EP2378506A3 (en) | 2014-05-21 |
US20100026709A1 (en) | 2010-02-04 |
EP1417666B1 (en) | 2016-04-13 |
KR20040019353A (ko) | 2004-03-05 |
US20070182756A1 (en) | 2007-08-09 |
EP2378506B1 (en) | 2017-10-04 |
KR100923053B1 (ko) | 2009-10-22 |
US20110157217A1 (en) | 2011-06-30 |
WO2003015066A3 (en) | 2003-12-24 |
US20070285442A1 (en) | 2007-12-13 |
US7623141B2 (en) | 2009-11-24 |
CN1539129B (zh) | 2010-07-07 |
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