vector<UIntSet> getHDRStacks(const PanoramaData & pano, UIntSet allImgs, PanoramaOptions opts)
{
vector<UIntSet> result;
// if no images are available, return empty result vector
if ( allImgs.empty() )
{
return result;
}
UIntSet stack;
CalculateImageOverlap overlap(&pano);
overlap.calculate(10); // we are testing 10*10=100 points
do {
unsigned srcImg = *(allImgs.begin());
stack.insert(srcImg);
allImgs.erase(srcImg);
// find all images that have a suitable overlap.
for (UIntSet::iterator it = allImgs.begin(); it != allImgs.end(); ) {
unsigned srcImg2 = *it;
++it;
if(overlap.getOverlap(srcImg,srcImg2)>opts.outputStacksMinOverlap)
{
stack.insert(srcImg2);
allImgs.erase(srcImg2);
}
}
result.push_back(stack);
stack.clear();
} while (allImgs.size() > 0);
return result;
}
vector<UIntSet> getExposureLayers(const PanoramaData & pano, UIntSet allImgs, PanoramaOptions opts)
{
vector<UIntSet> result;
// if no images are available, return empty result vector
if ( allImgs.empty() )
{
return result;
}
UIntSet stack;
do {
unsigned srcImg = *(allImgs.begin());
stack.insert(srcImg);
allImgs.erase(srcImg);
// find all images that have a suitable overlap.
SrcPanoImage simg = pano.getSrcImage(srcImg);
double maxEVDiff = opts.outputLayersExposureDiff;
for (UIntSet::iterator it = allImgs.begin(); it != allImgs.end(); ) {
unsigned srcImg2 = *it;
++it;
SrcPanoImage simg2 = pano.getSrcImage(srcImg2);
if ( fabs(simg.getExposureValue() - simg2.getExposureValue()) < maxEVDiff )
{
stack.insert(srcImg2);
allImgs.erase(srcImg2);
}
}
result.push_back(stack);
stack.clear();
} while (allImgs.size() > 0);
return result;
}
void CenterHorizontally::centerHorizontically(PanoramaData& panorama)
{
vigra::Size2D panoSize(360,180);
// remap into minature pano.
PanoramaOptions opts;
opts.setHFOV(360);
opts.setProjection(PanoramaOptions::EQUIRECTANGULAR);
opts.setWidth(360);
opts.setHeight(180);
// remap image
vigra::BImage panoAlpha(panoSize);
Nona::RemappedPanoImage<vigra::BImage, vigra::BImage> remapped;
// use selected images.
const UIntSet allActiveImgs(panorama.getActiveImages());
if (allActiveImgs.empty())
{
// do nothing if there are no images
return;
}
//only check unlinked images
UIntSet activeImgs;
for (UIntSet::const_iterator it = allActiveImgs.begin(); it!= allActiveImgs.end(); ++it)
{
const SrcPanoImage & img=panorama.getImage(*it);
bool consider=true;
if(img.YawisLinked())
{
for(UIntSet::const_iterator it2=activeImgs.begin(); it2!=activeImgs.end(); ++it2)
{
if(img.YawisLinkedWith(panorama.getSrcImage(*it2)))
{
consider=false;
break;
};
};
};
if(consider)
activeImgs.insert(*it);
};
for (UIntSet::iterator it = activeImgs.begin(); it != activeImgs.end(); ++it)
{
remapped.setPanoImage(panorama.getSrcImage(*it), opts, vigra::Rect2D(0,0,360,180));
// calculate alpha channel
remapped.calcAlpha();
// copy into global alpha channel.
vigra::copyImageIf(vigra_ext::applyRect(remapped.boundingBox(),
vigra_ext::srcMaskRange(remapped)),
vigra_ext::applyRect(remapped.boundingBox(),
vigra_ext::srcMask(remapped)),
vigra_ext::applyRect(remapped.boundingBox(),
destImage(panoAlpha)));
}
// get field of view
std::vector<int> borders;
bool colOccupied = false;
for (int h=0; h < 360; h++) {
bool curColOccupied = false;
for (int v=0; v< 180; v++) {
if (panoAlpha(h,v)) {
// pixel is valid
curColOccupied = true;
}
}
if ((colOccupied && !curColOccupied) ||
(!colOccupied && curColOccupied))
{
// change in position, save point.
borders.push_back(h-180);
colOccupied = curColOccupied;
}
}
int lastidx = borders.size() -1;
if (lastidx == -1) {
// empty pano
return;
}
if (colOccupied) {
// we have reached the right border, and the pano is still valid
// shift right fragments by 360 deg
// |11 2222| -> | 222211 |
std::vector<int> newBorders;
newBorders.push_back(borders[lastidx]);
for (int i = 0; i < lastidx; i++) {
newBorders.push_back(borders[i]+360);
}
borders = newBorders;
}
const double dYaw=(borders[0] + borders[lastidx])/2;
// apply yaw shift, takes also translation parameters into account
RotatePanorama(panorama, -dYaw, 0, 0).run();
}
