/**
*
* @param col
* @param raw
* @return
*/
uint8_t AsciiFilter::findBestMatch(ADMImage *source,int col,int row,int &luma)
{
int minDelta=0xfffffff;
int candidate=-1;
int stride=source->GetPitch (PLANAR_Y);
uint8_t *p=source->GetReadPtr(PLANAR_Y)+col*REDUCE_WIDTH+row*REDUCE_HEIGHT*stride;
// 1- create bitmask
uint16_t bitMask[REDUCE_WIDTH*REDUCE_HEIGHT];
createBitMask(bitMask,p,stride,luma);
// 32..127
for(int tries=32;tries<128;tries++)
{
int delta=computeDelta(tries,bitMask);
if(delta<minDelta)
{
minDelta=delta;
candidate=tries;
}
}
if(candidate==-1)
{
luma=128;
return '*';
}
else
return candidate;
}
unsigned int getNumberOfMasks() {
return createBitMask(width * height);
}