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comparison python/moving.py @ 520:fd9641cbd24b

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added function to classify object at instant from SVM
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 18 Jun 2014 01:19:18 -0400
parents 47d9970ee954
children ce40a89bd6ae
comparison
equal deleted inserted replaced
519:4ad5123d969e 520:fd9641cbd24b
829 if statisticsFunc(speeds) >= threshold: 829 if statisticsFunc(speeds) >= threshold:
830 self.setUserType(userType2Num['car']) 830 self.setUserType(userType2Num['car'])
831 else: 831 else:
832 self.setUserType(userType2Num['pedestrian']) 832 self.setUserType(userType2Num['pedestrian'])
833 833
834 def classifyUserTypeHoGSVMAtInstant(self, img, svm, instant, homography, width, height, px = 0.2, py = 0.2, pixelThreshold = 800):
835 '''Extract the image box around the object and
836 applies the SVM model on it'''
837 from numpy import array
838 croppedImg, yCropMin, yCropMax, xCropMin, xCropMax = imageBox(img, self, instant, homography, width, height, px, py, pixelThreshold)
839 if len(croppedImg) > 0: # != []
840 hog = array([cvutils.HOG(croppedImg)], dtype = np.float32)
841 return int(svm.predict(hog))
842 else:
843 return userType2Num['unknown']
844
834 @staticmethod 845 @staticmethod
835 def collisionCourseDotProduct(movingObject1, movingObject2, instant): 846 def collisionCourseDotProduct(movingObject1, movingObject2, instant):
836 'A positive result indicates that the road users are getting closer' 847 'A positive result indicates that the road users are getting closer'
837 deltap = movingObject1.getPositionAtInstant(instant)-movingObject2.getPositionAtInstant(instant) 848 deltap = movingObject1.getPositionAtInstant(instant)-movingObject2.getPositionAtInstant(instant)
838 deltav = movingObject2.getVelocityAtInstant(instant)-movingObject1.getVelocityAtInstant(instant) 849 deltav = movingObject2.getVelocityAtInstant(instant)-movingObject1.getVelocityAtInstant(instant)