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Improved performance when counting black pixels. #2

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Jan 5, 2018
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Improved performance when counting black pixels. #2

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15 changes: 5 additions & 10 deletions MotionDetector.py
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Original file line number Diff line number Diff line change
Expand Up @@ -91,17 +91,12 @@ def processImage(self, frame):

def somethingHasMoved(self):
nb=0 #Will hold the number of black pixels

for x in range(self.height): #Iterate the hole image
for y in range(self.width):
if self.res[x,y] == 0.0: #If the pixel is black keep it
nb += 1
avg = (nb*100.0)/self.nb_pixels #Calculate the average of black pixel in the image

if avg > self.threshold:#If over the ceiling trigger the alarm
return True
min_threshold = (self.nb_pixels/100) * self.threshold #Number of pixels for current threshold
nb = self.nb_pixels - cv.CountNonZero(self.res)
if (nb) > min_threshold:
return True
else:
return False
return False

if __name__=="__main__":
detect = MotionDetectorInstantaneous(doRecord=True)
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