From b6cef14d64a0595b2157332953712675abde99fd Mon Sep 17 00:00:00 2001
From: Artwork1 <artwork1@rubenvandeven.com>
Date: Fri, 15 Dec 2017 23:22:09 +0100
Subject: [PATCH] altered output

---
 scan_faces.py | 62 +++++++++++++++++++++++++++++++++------------------
 1 file changed, 40 insertions(+), 22 deletions(-)
 mode change 100644 => 100755 scan_faces.py

diff --git a/scan_faces.py b/scan_faces.py
old mode 100644
new mode 100755
index d7b21eb..afaa4f4
--- a/scan_faces.py
+++ b/scan_faces.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python
+
 import io
 import picamera
 import cv2
@@ -7,20 +9,10 @@ import time
 
 import Adafruit_CharLCD as LCD
 
-# Init camera
-camera = picamera.PiCamera()
-camera.resolution = (1280, 720)
-
-# Init classifier, various options:
-#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml (~22sec)
-#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml (>25sec)
-#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml (~21sec)
-#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt_tree.xml (~14sec, seems to miss many faces)
-classifier = cv2.CascadeClassifier('/usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml')
-
 # Set FPS (though RPi is probably to slow to meet it ;-)
 FPS = 1.0
 frameTimeDelta = datetime.timedelta(seconds=1.0/FPS)
+dimTimeDelta = datetime.timedelta(seconds=10)
 
 # Init LCD
 lcd_rs = 27
@@ -37,8 +29,29 @@ lcd_rows    = 2
 lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7,
                            lcd_columns, lcd_rows, lcd_backlight)
 
+lcd.clear()
+lcd.message("Init scanner.")
+
+# Init camera
+camera = picamera.PiCamera()
+camera.resolution = (1280, 720)
+
+lcd.clear()
+lcd.message("Init scanner..")
+
+# Init classifier, various options:
+#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml (~22sec)
+#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml (>25sec)
+#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml (~21sec)
+#~ /usr/share/opencv/haarcascades/haarcascade_frontalface_alt_tree.xml (~14sec, seems to miss many faces)
+classifier = cv2.CascadeClassifier('/usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml')
+lcd.clear()
+lcd.message("Init scanner...")
+
 prevFaceCount = 0
-totalUse = 0
+totalUse = 0 #in face-seconds
+
+lastFaceTime = datetime.datetime.utcnow()
 
 while True:
 	print(time.time(),"GO")
@@ -56,22 +69,27 @@ while True:
 	
 	print(time.time(),"Found {} faces".format(len(faces)))
 	
+	end = datetime.datetime.utcnow()
+	# take the frame as being representative of whole frame
+	scanDuration = (end - start).total_seconds()
+	totalUse += len(faces) * scanDuration
+	
 	lcd.clear()
-	lcd.message("Current {:>8}\nTotal {:>10}".format(len(faces), totalUse))
-	if len(faces) < 1 and prevFaceCount < 1:
+	#~ lcd.message("viewers {:>8}\nview-min. {:>7.2f}".format(len(faces), totalUse/60))
+	lcd.message("viewers {:>8}\nview-sec {:>7}".format(len(faces), int(totalUse)))
+	if len(faces) < 1 and end - lastFaceTime > dimTimeDelta:
 		lcd.set_backlight(0)
 	else:
 		lcd.set_backlight(1)
 	
-	end = datetime.datetime.utcnow()
-	prevFaceCount = len(faces)
-	totalUse += len(faces)
-	
-	if end - start < frameTimeDelta:
+	if len(faces) > 0:
+		lastFaceTime = end
 		
-		waitTime = frameTimeDelta - (end-start)
-		print("wait {}".waitTime.total_seconds())
-		time.sleep(waitTime.total_seconds())
+	#~ if end - start < frameTimeDelta:
+		
+		#~ waitTime = frameTimeDelta - (end-start)
+		#~ print("wait {}".waitTime.total_seconds())
+		#~ time.sleep(waitTime.total_seconds())