/** Get frames that at least are partially selected */
public Set<EvDecimal> getFrames(Imageset rec, String channel) {
TreeSet<EvDecimal> c = new TreeSet<EvDecimal>();
for (ROI roi : getSubRoi()) c.addAll(roi.getFrames(rec, channel));
return c;
}
/** Get channels that at least are partially selected */
public Set<String> getChannels(Imageset rec) {
TreeSet<String> c = new TreeSet<String>();
for (ROI roi : getSubRoi()) c.addAll(roi.getChannels(rec));
return c;
}