void hdrNormalize( Channel32f *channel )
{
// first take histogram to find the minimum and maximum values present
float minVal, maxVal;
getMinMax( *channel, &minVal, &maxVal );
// if min==max then we should just fill with black
if( minVal == maxVal ) {
fill<float>( channel, 0 );
return;
}
float scale = 1.0f / ( maxVal - minVal );
Channel32f::Iter iter = channel->getIter();
while( iter.line() ) {
while( iter.pixel() ) {
iter.v() = ( iter.v() - minVal ) * scale;
}
}
}
void VisualAgitation::update() {
if( mCapture && mCapture.checkNewFrame() ) {
Channel32f newChan(mCapture.getSurface() );
Channel32f::Iter iterNew = newChan.getIter();
Channel32f::Iter iterOld = mChannel.getIter();
deltaSum = 0.0f;
while( iterNew.line() && iterOld.line() ) {
while( iterNew.pixel() && iterOld.pixel() ) {
deltaSum += fabsf( iterNew.v() - iterOld.v());
}
}
mChannel = newChan ;
}
}