From e2c7974f8a22e57065080a334ad36af5ec90f4a1 Mon Sep 17 00:00:00 2001
From: Bart Moyaers <bart.moyaers@kuleuven.be>
Date: Fri, 6 Dec 2019 11:48:04 +0100
Subject: [PATCH] test blob detection

---
 heatmap_test.py | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/heatmap_test.py b/heatmap_test.py
index aa6c19b..2c33894 100644
--- a/heatmap_test.py
+++ b/heatmap_test.py
@@ -1,9 +1,26 @@
 import cv2
 from video_loader import VideoLoader
-from background_heatmap import BackgroundHeatmap
+from background_heatmap import BackgroundHeatmap, BackgroundHeatmapFromGroup
+import numpy as np
+
 
 if __name__ == '__main__':
 
+    params = cv2.SimpleBlobDetector_Params()
+    params.minThreshold = 60
+    params.maxThreshold = 255
+    # Filter by Area.
+    params.filterByArea = True
+    params.minArea = 20
+    params.maxArea = 25000
+    params.filterByCircularity = False
+    params.filterByColor = False
+    params.filterByConvexity = False
+    params.filterByInertia = False
+    params.blobColor = 255
+
+    detector = cv2.SimpleBlobDetector_create(params)
+
     projects_path = "C:\\UntrackedGit\\opencv_test\\him_projects"
     loader = VideoLoader(projects_path)
     groups = loader.get_recordings_grouped()
@@ -20,7 +37,18 @@ if __name__ == '__main__':
                 # out.write(converted)
                 # cv2.imshow("Heatmap", heatmap.heatmap)
                 cv2.imshow("Background filter", bgh.lastframe)
+                diff = bgh.bgf_diff
+
+                # Erode dilate
+                kernel = np.ones((5,5),np.uint8)
+                diff = cv2.morphologyEx(diff, cv2.MORPH_OPEN, kernel)
+
+                keypoints = detector.detect(diff)
+                frame_with_keypoints = cv2.drawKeypoints(diff, keypoints, np.array([]), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
+
+                cv2.imshow("BGF diff", frame_with_keypoints)
                 cv2.moveWindow("Background filter", 600, 100)
+                cv2.moveWindow("BGF diff", 1200, 100)
                 if cv2.waitKey(1) & 0xFF == ord('q'):
                     break
             heatmaps.append(bgh.heatmap)