Mercurial Hosting > traffic-intelligence
view scripts/undistort-video.py @ 1280:2abeccdbb985 default tip
removing print debug
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Wed, 03 Jul 2024 15:13:15 -0400 |
parents | 2aa56b101041 |
children |
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#! /usr/bin/env python3 import sys, argparse import numpy as np import cv2 from trafficintelligence import cvutils from math import ceil, log10 from pathlib import Path 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, default = 1.) parser.add_argument('-k', dest = 'maskFilename', help = 'name of the mask file, to undistort to see how it covers the undistortion errors') parser.add_argument('-f', dest = 'firstFrameNum', help = 'number of first frame number to display', type = int, default = 0) parser.add_argument('-l', dest = 'lastFrameNum', help = 'number of last frame number to save', type = int) parser.add_argument('-d', dest = 'destinationDirname', help = 'name of the directory where the undistorted frames are saved') parser.add_argument('--encode', dest = 'encodeVideo', help = 'indicate if video is generated at the end (default Xvid)', action = 'store_true') parser.add_argument('--fps', dest = 'fps', help = 'frame per second of the output video file if encoding', type = float, default = 30) parser.add_argument('--bitrate', dest = 'bitrate', help = 'bitrate of the output video file if encoding', type = int, default = 5000) args = parser.parse_args() intrinsicCameraMatrix = np.loadtxt(args.intrinsicCameraMatrixFilename) if args.destinationDirname is None: destinationPath = Path('.') else: destinationPath = Path(destinationPath) if not destinationPath.exists(): destinationPath.mkdir() capture = cv2.VideoCapture(args.videoFilename) width = int(capture.get(cv2.CAP_PROP_FRAME_WIDTH)) height = int(capture.get(cv2.CAP_PROP_FRAME_HEIGHT)) [map1, map2], newCameraMatrix = cvutils.computeUndistortMaps(width, height, args.undistortedImageMultiplication, intrinsicCameraMatrix, args.distortionCoefficients) if args.maskFilename is not None: mask = cv2.imread(args.maskFilename, cv2.IMREAD_GRAYSCALE) undistortedMask = cv2.remap(mask, map1, map2, interpolation=cv2.INTER_LINEAR)/255 if capture.isOpened(): ret = True frameNum = args.firstFrameNum capture.set(cv2.CAP_PROP_POS_FRAMES, args.firstFrameNum) if args.lastFrameNum is None: lastFrameNum = float('inf') 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(str(destinationPath/Path('undistorted-{{:0{}}}.png'.format(nZerosFilename).format(frameNum))), img) if args.maskFilename is not None: cv2.imwrite(str(destinationPath/Path('undistorted+mask-{{:0{}}}.png'.format(nZerosFilename).format(frameNum))), cv2.multiply(img, undistortedMask, dtype = 16)) frameNum += 1 if args.encodeVideo: print('Encoding the images files in video') from subprocess import check_call from storage import openCheck out = openCheck("err.log", "w") check_call("mencoder \'mf://"+destinationPath+"*.png\' -mf fps={}:type=png -ovc xvid -xvidencopts bitrate={} -nosound -o ".format(args.fps, args.bitrate)+destinationDirname+"undistort.avi", stderr = out, shell = True) out.close()