@Override
public List<Frame> execute(List<CVParticle> input) throws Exception {
Frame frame = null;
List<Feature> features = new ArrayList<Feature>();
for (CVParticle particle : input) {
if (particle instanceof Feature) {
features.add((Feature) particle);
} else if (particle instanceof Frame && frame == null) {
frame = (Frame) particle;
}
}
if (frame == null)
frame =
new Frame(
input.get(0).getStreamId(),
input.get(0).getSequenceNr(),
Frame.NO_IMAGE,
(byte[]) null,
0L,
new Rectangle());
// merge new features with already existing features in the Frame
f1:
for (Feature newF : features) {
for (Feature oldF : frame.getFeatures()) {
if (newF.getName().equals(oldF.getName())) {
oldF.getSparseDescriptors().addAll(newF.getSparseDescriptors());
continue f1;
}
}
frame.getFeatures().add(newF);
}
List<Frame> result = new ArrayList<Frame>();
result.add(frame);
return result;
}
