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comparison python/moving.py @ 203:e2f31813ade6

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added code to display trajectories on videa
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Tue, 06 Mar 2012 18:10:19 -0500
parents c06379f25ab8
children ada6e8fbe4c6
comparison
equal deleted inserted replaced
202:b0b964ba9489 203:e2f31813ade6
150 '2-norm distance (Euclidean distance)' 150 '2-norm distance (Euclidean distance)'
151 return sqrt(self.norm2Squared()) 151 return sqrt(self.norm2Squared())
152 152
153 def aslist(self): 153 def aslist(self):
154 return [self.x, self.y] 154 return [self.x, self.y]
155
156 def astuple(self):
157 return (self.x, self.y)
155 158
156 def project(self, homography): 159 def project(self, homography):
157 from numpy.core.multiarray import array 160 from numpy.core.multiarray import array
158 projected = cvutils.projectArray(homography, array([[self.x], [self.y]])) 161 projected = cvutils.projectArray(homography, array([[self.x], [self.y]]))
159 return Point(projected[0], projected[1]) 162 return Point(projected[0], projected[1])
255 i.e. a temporal sequence of positions 258 i.e. a temporal sequence of positions
256 259
257 the class is iterable.''' 260 the class is iterable.'''
258 261
259 def __init__(self, positions=None): 262 def __init__(self, positions=None):
260 if positions: 263 if positions != None:
261 self.positions = positions 264 self.positions = positions
262 else: 265 else:
263 self.positions = [[],[]] 266 self.positions = [[],[]]
264 267
265 @staticmethod 268 @staticmethod
285 raise StopIteration 288 raise StopIteration
286 else: 289 else:
287 self.iterInstantNum += 1 290 self.iterInstantNum += 1
288 return self[self.iterInstantNum-1] 291 return self[self.iterInstantNum-1]
289 292
293 def length(self):
294 return len(self.positions[0])
295
290 def addPositionXY(self, x, y): 296 def addPositionXY(self, x, y):
291 self.positions[0].append(x) 297 self.positions[0].append(x)
292 self.positions[1].append(y) 298 self.positions[1].append(y)
293 299
294 def addPosition(self, p): 300 def addPosition(self, p):
295 self.addPositionXY(p.x, p.y) 301 self.addPositionXY(p.x, p.y)
296 302
297 @staticmethod 303 @staticmethod
298 def _draw(positions, options = '', withOrigin = False): 304 def _draw(positions, options = '', withOrigin = False, lastCoordinate = None):
299 from matplotlib.pylab import plot 305 from matplotlib.pylab import plot
300 plot(positions[0], positions[1], options) 306 if lastCoordinate == None:
307 plot(positions[0], positions[1], options)
308 elif 0 <= lastCoordinate <= len(positions[0]):
309 plot(positions[0][:lastCoordinate], positions[1][:lastCoordinate], options)
301 if withOrigin: 310 if withOrigin:
302 plot([positions[0][0]], [positions[1][0]], 'ro') 311 plot([positions[0][0]], [positions[1][0]], 'ro')
303 312
313 def project(self, homography):
314 from numpy.core.multiarray import array
315 projected = cvutils.projectArray(homography, array(self.positions))
316 return Trajectory(projected)
317
304 def draw(self, options = '', withOrigin = False): 318 def draw(self, options = '', withOrigin = False):
305 Trajectory._draw(self.positions, options, withOrigin) 319 Trajectory._draw(self.positions, options, withOrigin)
306 320
307 def drawOnImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False): 321 def drawAt(self, lastCoordinate, options = '', withOrigin = False):
322 Trajectory._draw(self.positions, options, withOrigin, lastCoordinate)
323
324 def drawOnWorldImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False):
308 from matplotlib.pylab import plot 325 from matplotlib.pylab import plot
309 imgPositions = [[x*nPixelsPerUnitDistance for x in self.positions[0]], 326 imgPositions = [[x*nPixelsPerUnitDistance for x in self.positions[0]],
310 [-x*nPixelsPerUnitDistance+imageHeight for x in self.positions[1]]] 327 [-x*nPixelsPerUnitDistance+imageHeight for x in self.positions[1]]]
311 Trajectory._draw(imgPositions, options, withOrigin) 328 Trajectory._draw(imgPositions, options, withOrigin)
312
313 def length(self):
314 return len(self.positions[0])
315 329
316 def getXCoordinates(self): 330 def getXCoordinates(self):
317 return self.positions[0] 331 return self.positions[0]
318 332
319 def getYCoordinates(self): 333 def getYCoordinates(self):
476 return self.positions.getYCoordinates() 490 return self.positions.getYCoordinates()
477 491
478 def draw(self, options = '', withOrigin = False): 492 def draw(self, options = '', withOrigin = False):
479 self.positions.draw(options, withOrigin) 493 self.positions.draw(options, withOrigin)
480 494
481 def drawOnImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False): 495 def drawWorldOnImage(self, nPixelsPerUnitDistance, imageHeight, options = '', withOrigin = False):
482 self.positions.drawOnImage(nPixelsPerUnitDistance, imageHeight, options, withOrigin) 496 self.positions.drawWorldOnImage(nPixelsPerUnitDistance, imageHeight, options, withOrigin)
483 497
484 def getInstantsCrossingLane(self, p1, p2): 498 def getInstantsCrossingLane(self, p1, p2):
485 '''Returns the instant(s) 499 '''Returns the instant(s)
486 at which the object passes from one side of the segment to the other 500 at which the object passes from one side of the segment to the other
487 empty list if there is no crossing''' 501 empty list if there is no crossing'''