frameSegment_create create boundaries if needed

matlab/+Segment/frameSegment_create.m

@@ -7,10 +7,17 @@ function newCell=frameSegment_create(idxPixels, imSize, channel, time, ...
         return;
     end
     
+    if ~exist('bounds','var')
+        bw=logical(zeros(imSize));
+        bw(idxPixels)=1;
+        bounds=bwboundaries(bw);
+    end
+    
     newCell=[];
     newCell.surface=[bounds{1}(:,2),bounds{1}(:,1)];   
     [r,c]=ind2sub(imSize,idxPixels);
     
+    
     newCell.time=time;
     newCell.centroid=[mean([c,r]) 0];