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comparison python/cvutils.py @ 478:d337bffd7283

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Display of points in compute homography and step option to replay videos A bug seems to remain with respect to trajectory bounds, to check
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Thu, 27 Mar 2014 11:40:28 -0400
parents 59903d14d244
children f6415f012640
comparison
equal deleted inserted replaced
477:ed4166b0ba9d 478:d337bffd7283
200 else: 200 else:
201 imgcrop = [] 201 imgcrop = []
202 return imgcrop, yCropMin, yCropMax, xCropMin, xCropMax 202 return imgcrop, yCropMin, yCropMax, xCropMin, xCropMax
203 203
204 204
205 def displayTrajectories(videoFilename, objects, boundingBoxes = {}, homography = None, firstFrameNum = 0, lastFrameNumArg = None, printFrames = True, rescale = 1.): 205 def displayTrajectories(videoFilename, objects, boundingBoxes = {}, homography = None, firstFrameNum = 0, lastFrameNumArg = None, printFrames = True, rescale = 1., nFramesStep = 1):
206 '''Displays the objects overlaid frame by frame over the video ''' 206 '''Displays the objects overlaid frame by frame over the video '''
207 from moving import userTypeNames 207 from moving import userTypeNames
208 208
209 capture = cv2.VideoCapture(videoFilename) 209 capture = cv2.VideoCapture(videoFilename)
210 width = int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)) 210 width = int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH))
244 cv2.putText(img, objDescription, obj.projectedPositions[frameNum-obj.getFirstInstant()].asint().astuple(), cv2.cv.CV_FONT_HERSHEY_PLAIN, 1, cvRed) 244 cv2.putText(img, objDescription, obj.projectedPositions[frameNum-obj.getFirstInstant()].asint().astuple(), cv2.cv.CV_FONT_HERSHEY_PLAIN, 1, cvRed)
245 cvImshow('frame', img, rescale) 245 cvImshow('frame', img, rescale)
246 key = cv2.waitKey() 246 key = cv2.waitKey()
247 if saveKey(key): 247 if saveKey(key):
248 cv2.imwrite('image.png', img) 248 cv2.imwrite('image.png', img)
249 frameNum += 1 249 frameNum += nFramesStep
250 if nFramesStep > 1:
251 capture.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, frameNum)
250 cv2.destroyAllWindows() 252 cv2.destroyAllWindows()
251 else: 253 else:
252 print 'Cannot load file ' + videoFilename 254 print 'Cannot load file ' + videoFilename
253 255
254 def computeHomographyFromPDTV(cameraFilename, method=0, ransacReprojThreshold=3.0): 256 def computeHomographyFromPDTV(cameraFilename, method=0, ransacReprojThreshold=3.0):