remove duplicate proposals on the fly when loading

shared/deduplicate_proposals.m

@@ -0,0 +1,19 @@
+function [proposals, scores] = deduplicate_proposals(proposals, scores)
+% Be sure to call this AFTER the proposals are in the right order.
+% We cannot just order by score, because not all proposal methods are
+% sorted by the same rule.
+
+  if isempty(proposals)
+    return;
+  end
+
+  rproposals = proposals;
+  rproposals(:,1:2) = round(rproposals(:,1:2));
+  rproposals(:,3:4) = ceil(rproposals(:,3:4));
+  [~, idxs] = unique(rproposals, 'rows', 'stable');
+  proposals = proposals(idxs,:);
+  if ~isempty(scores)
+    scores = scores(idxs);
+  end
+
+end

shared/get_candidates.m

@@ -28,6 +28,7 @@
     scores = scores{idx};
   end
 
+
   if allow_filtering
     if strcmp(method_config.order, 'none')
       % nothing to do
@@ -57,6 +58,9 @@
       candidates = candidates(argsort,:);
     end
 
+    % remove duplicates on the fly
+    [candidates, scores] = deduplicate_proposals(candidates, scores);
+
     num_candidates = min(num_candidates, size(candidates, 1));
     candidates = candidates(1:num_candidates,:);
     if numel(scores) > 0