From 09ee1756803e66213cab12cca9bf9c25ade772c4 Mon Sep 17 00:00:00 2001
From: Michael Towsey <m.towsey@qut.edu.au>
Date: Tue, 5 May 2020 16:16:21 +1000
Subject: [PATCH] Update BotaurusPoiciloptilus.cs

Add in filter to remove events that are likely to be false positives.
---
 .../Recognizers/Birds/BotaurusPoiciloptilus.cs     | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/AnalysisPrograms/Recognizers/Birds/BotaurusPoiciloptilus.cs b/src/AnalysisPrograms/Recognizers/Birds/BotaurusPoiciloptilus.cs
index afd433b82..09469ae4c 100644
--- a/src/AnalysisPrograms/Recognizers/Birds/BotaurusPoiciloptilus.cs
+++ b/src/AnalysisPrograms/Recognizers/Birds/BotaurusPoiciloptilus.cs
@@ -110,7 +110,19 @@ public override RecognizerResults Recognize(
                 newEvents = CompositeEvent.CombineSimilarProximalEvents(spectralEvents, TimeSpan.FromSeconds(startDiff), (int)hertzDiff);
             }
 
-            combinedResults.NewEvents = newEvents;
+            //filter the events for duration and bandwidth
+            var filteredEvents = new List<EventCommon>();
+            foreach (var ev in newEvents)
+            {
+                var eventDuration = ((SpectralEvent)ev).EventEndSeconds - ev.EventStartSeconds;
+                var eventBandWidth = ((SpectralEvent)ev).BandWidthHertz;
+                if (eventDuration > 2.0 && eventDuration < 11.0 && eventBandWidth > 50)
+                {
+                    filteredEvents.Add(ev);
+                }
+            }
+
+            combinedResults.NewEvents = filteredEvents;
 
             //UNCOMMENT following line if you want special debug spectrogram, i.e. with special plots.
             //  NOTE: Standard spectrograms are produced by setting SaveSonogramImages: "True" or "WhenEventsDetected" in <Towsey.PteropusSpecies.yml> config file.