Mercurial Hosting > traffic-intelligence
view scripts/undistort-video.py @ 738:2472b4d59aea dev
small function
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Fri, 14 Aug 2015 17:45:45 -0400 |
parents | 3058e00887bc |
children | d72e4bcc1e36 |
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#! /usr/bin/env python import sys, argparse import numpy as np import cv2 import cvutils from math import ceil, log10 parser = argparse.ArgumentParser(description='''The program converts a video into a series of images corrected for distortion. One can then use mencoder to generate a movie, eg $ mencoder 'mf://./*.png' -mf fps=[framerate]:type=png -ovc xvid -xvidencopts bitrate=[bitrate] -nosound -o [output.avi]''') parser.add_argument('-i', dest = 'videoFilename', help = 'filename of the video sequence') parser.add_argument('--intrinsic', dest = 'intrinsicCameraMatrixFilename', help = 'name of the intrinsic camera file') parser.add_argument('--distortion-coefficients', dest = 'distortionCoefficients', help = 'distortion coefficients', nargs = '*', type = float) parser.add_argument('--undistorted-multiplication', dest = 'undistortedImageMultiplication', help = 'undistorted image multiplication', type = float) parser.add_argument('-f', dest = 'firstFrameNum', help = 'number of first frame number to display', type = int) parser.add_argument('-l', dest = 'lastFrameNum', help = 'number of last frame number to save', type = int) args = parser.parse_args() intrinsicCameraMatrix = np.loadtxt(args.intrinsicCameraMatrixFilename) #distortionCoefficients = args.distortionCoefficients #undistortedImageMultiplication = args.undistortedImageMultiplication #firstFrameNum = params.firstFrameNum capture = cv2.VideoCapture(args.videoFilename) width = int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)) height = int(capture.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT)) [map1, map2] = cvutils.computeUndistortMaps(width, height, args.undistortedImageMultiplication, intrinsicCameraMatrix, args.distortionCoefficients) if capture.isOpened(): ret = True frameNum = args.firstFrameNum capture.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, args.firstFrameNum) if args.lastFrameNum is None: from sys import maxint lastFrameNum = maxint else: lastFrameNum = args.lastFrameNum nZerosFilename = int(ceil(log10(lastFrameNum))) while ret and frameNum < lastFrameNum: ret, img = capture.read() if ret: img = cv2.remap(img, map1, map2, interpolation=cv2.INTER_LINEAR) cv2.imwrite('undistorted-{{:0{}}}.png'.format(nZerosFilename).format(frameNum), img) frameNum += 1