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comparison python/moving.py @ 248:571ba5ed22e2

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added utils for bus processing
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 18 Jul 2012 02:54:22 -0400
parents bd8ab323c198
children 99173da7afae
comparison
equal deleted inserted replaced
247:8f0ed138d373 248:571ba5ed22e2
2 '''Libraries for moving objects, trajectories...''' 2 '''Libraries for moving objects, trajectories...'''
3 3
4 import utils; 4 import utils;
5 import cvutils; 5 import cvutils;
6 6
7 from math import sqrt, hypot; 7 from math import sqrt;
8 8
9 #from shapely.geometry import Polygon 9 #from shapely.geometry import Polygon
10 10
11 __metaclass__ = type 11 __metaclass__ = type
12 12
46 def inside(self, interval2): 46 def inside(self, interval2):
47 'indicates if the temporal interval of self is comprised in interval2' 47 'indicates if the temporal interval of self is comprised in interval2'
48 return (self.first >= interval2.first) and (self.last <= interval2.last) 48 return (self.first >= interval2.first) and (self.last <= interval2.last)
49 49
50 def union(self, interval2): 50 def union(self, interval2):
51 '''Largest interval comprising self and interval2''' 51 '''Smallest interval comprising self and interval2'''
52 return TimeInterval(min(self.first, interval2.first), max(self.last, interval2.last)) 52 return TimeInterval(min(self.first, interval2.first), max(self.last, interval2.last))
53 53
54 def intersection(self, interval2): 54 def intersection(self, interval2):
55 '''Largest interval comprised in both self and interval2''' 55 '''Largest interval comprised in both self and interval2'''
56 return TimeInterval(max(self.first, interval2.first), min(self.last, interval2.last)) 56 return TimeInterval(max(self.first, interval2.first), min(self.last, interval2.last))
57
58 def distance(self, interval2):
59 if not self.intersection(interval2).empty():
60 return 0
61 elif self.first > interval2.last:
62 return self.first - interval2.last
63 elif self.last < interval2.first:
64 return interval2.first - self.last
65 else:
66 return None
67
68
69 def unionIntervals(intervals):
70 'returns the smallest interval containing all intervals'
71 inter = intervals[0]
72 for i in intervals[1:]:
73 inter = inter.union(i)
74 return inter
57 75
58 76
59 class TimeInterval(Interval): 77 class TimeInterval(Interval):
60 '''Temporal interval based on frame numbers (hence the modified length method) 78 '''Temporal interval based on frame numbers (hence the modified length method)
61 may be modified directly by setting first and last''' 79 may be modified directly by setting first and last'''
377 def norm(self): 395 def norm(self):
378 '''Returns the list of the norms at each instant''' 396 '''Returns the list of the norms at each instant'''
379 # def add(x, y): return x+y 397 # def add(x, y): return x+y
380 # sq = map(add, [x*x for x in self.positions[0]], [y*y for y in self.positions[1]]) 398 # sq = map(add, [x*x for x in self.positions[0]], [y*y for y in self.positions[1]])
381 # return sqrt(sq) 399 # return sqrt(sq)
382 return [hypot(x,y) for x,y in zip(self.positions[0], self.positions[1])] 400 from numpy import hypot
401 return hypot(self.positions[0], self.positions[1])
383 402
384 def cumulatedDisplacement(self): 403 def cumulatedDisplacement(self):
385 'Returns the sum of the distances between each successive point' 404 'Returns the sum of the distances between each successive point'
386 displacement = 0 405 displacement = 0
387 for i in xrange(self.length()-1): 406 for i in xrange(self.length()-1):
504 self.positions.draw(options, withOrigin, **kwargs) 523 self.positions.draw(options, withOrigin, **kwargs)
505 524
506 def drawOnWorldImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False, **kwargs): 525 def drawOnWorldImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False, **kwargs):
507 self.positions.drawOnWorldImage(nPixelsPerUnitDistance, imageHeight, options, withOrigin, **kwargs) 526 self.positions.drawOnWorldImage(nPixelsPerUnitDistance, imageHeight, options, withOrigin, **kwargs)
508 527
528 def play(self, videoFilename, homography = None):
529 cvutils.displayTrajectories(videoFilename, [self], homography, self.getFirstInstant(), self.getLastInstant())
530
509 def getInstantsCrossingLane(self, p1, p2): 531 def getInstantsCrossingLane(self, p1, p2):
510 '''Returns the instant(s) 532 '''Returns the instant(s)
511 at which the object passes from one side of the segment to the other 533 at which the object passes from one side of the segment to the other
512 empty list if there is no crossing''' 534 empty list if there is no crossing'''
513 indices = self.positions.getIntersections(p1, p2) 535 indices = self.positions.getIntersections(p1, p2)