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system("alchemy.exe -j -Xd1920 -Yd1080 a.jpg b.jpg");
//alchemy.exe从www.handmade.com下载
//隔点
unsigned short *dest;
unsigned short *src;
int i;
int j;
unsigned short *ptr=src;
for(i=0;i<1080;i++)
{
for(j=0;j<1920;j++)
{
*dest=*(ptr+(j+1)*4592/1920);
}
ptr=src + 4592*((i+1)*3156/1080);
}code]
[code=c]
//截取
unsigned short *dest;
unsigned short *src;
int i;
int j;
unsigned short *ptr=src;
for(i=0;i<1080;i++)
{
for(j=0;j<1920;j++)
{
*dest=*ptr;
}
ptr=src + (4592-1920);
}