diff functions/challange/eventDetectionMetrics_eventBased.m @ 0:2fadb31a9d55 tip

Import code by Vuegen et al

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/functions/challange/eventDetectionMetrics_eventBased.m	Fri Oct 11 12:02:43 2013 +0100
@@ -0,0 +1,56 @@
+function [results] = eventDetectionMetrics_eventBased(outputFile,GTFile)
+
+% Event-based evaluation for event detection task
+% outputFile: the output of the event detection system
+% GTFile: the ground truth list of events
+
+% Load event list from output and ground-truth
+[onset,offset,classNames] = loadEventsList(outputFile);
+[onsetGT,offsetGT,classNamesGT] = loadEventsList(GTFile);
+
+
+% Total number of detected and reference events
+Ntot = length(onset);
+Nref = length(onsetGT);
+
+
+% Number of correctly transcribed events, onset within a +/-100 ms range
+Ncorr = 0;
+NcorrOff = 0;
+for j=1:length(onsetGT)
+    for i=1:length(onset)
+        
+        if( strcmp(classNames{i},classNamesGT{j}) && (abs(onsetGT(j)-onset(i))<=0.1) )
+            Ncorr = Ncorr+1; 
+            
+            % If offset within a +/-100 ms range or within 50% of ground-truth event's duration
+            if abs(offsetGT(j) - offset(i)) <= max(0.1, 0.5 * (offsetGT(j) - onsetGT(j)))
+                NcorrOff = NcorrOff +1;
+            end;
+            
+            break; % In order to not evaluate duplicates
+            
+        end;
+    end;
+    
+end;
+
+
+% Compute onset-only event-based metrics
+Nfp = Ntot-Ncorr;
+Nfn = Nref-Ncorr;
+Nsubs = min(Nfp,Nfn);
+results.Rec = Ncorr/(Nref+eps);
+results.Pre = Ncorr/(Ntot+eps);
+results.F = 2*((results.Pre*results.Rec)/(results.Pre+results.Rec+eps));
+results.AEER= (Nfn+Nfp+Nsubs)/(Nref+eps);
+
+
+% Compute onset-offset event-based metrics
+NfpOff = Ntot-NcorrOff;
+NfnOff = Nref-NcorrOff;
+NsubsOff = min(NfpOff,NfnOff);
+results.RecOff = NcorrOff/(Nref+eps);
+results.PreOff = NcorrOff/(Ntot+eps);
+results.FOff = 2*((results.PreOff*results.RecOff)/(results.PreOff+results.RecOff+eps));
+results.AEEROff= (NfnOff+NfpOff+NsubsOff)/(Nref+eps);