wtfilterspec.h

来自「jpeg 2000 压缩算法源代码 核心ebcot」· C头文件 代码 · 共 30 行

;
	else 
	{
		int i;
		double *x=(double *)pData;
	    double *y=new double[nLenth];
		int halflenth=(int)(ceil(nLenth/2.0));
		int index=0;
		double alfa,beta,gama,deta,K;
		alfa=-1.586134342;
        beta=-0.052980118;
        gama=0.882911075;
        deta=0.443506852;
        K=1.230174105;

		//step 1,2
	    for (i=1;i<nLenth-1;i+=2)
		{
		    *(y+index+halflenth)=*(x+i)+alfa*(*(x+i-1)+*(x+i+1));
		    index++;
		}
     
        if (nLenth%2==0)
           *(y+index+halflenth)=*(x+nLenth-1)+alfa*2*(*(x+nLenth-2));
	    *y=*x+2*beta*(*(y+halflenth));
        index=1;
        if (nLenth>2)
           for (i=2;i<nLenth-1;i+=2)
			{