Mercurial Hosting > traffic-intelligence
view scripts/learn-motion-patterns.py @ 1265:0f5bebd62a55
minor modifications
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Fri, 24 May 2024 16:15:38 -0400 |
parents | f2ba9858e6c6 |
children |
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#! /usr/bin/env python3 import sys, argparse import numpy as np import matplotlib.pyplot as plt from trafficintelligence import ml, utils, storage, moving, processing parser = argparse.ArgumentParser(description='''The program clusters trajectories, each cluster being represented by a trajectory. It can either work on the same dataset (database) or different ones, but only does learning or assignment at a time to avoid issues''') #, epilog = '' #parser.add_argument('--cfg', dest = 'configFilename', help = 'name of the configuration file') parser.add_argument('-d', dest = 'databaseFilename', help = 'name of the Sqlite database file', required = True) parser.add_argument('-o', dest = 'outputPrototypeDatabaseFilename', help = 'name of the Sqlite database file to save prototypes') parser.add_argument('-i', dest = 'inputPrototypeDatabaseFilename', help = 'name of the Sqlite database file for prototypes to start the algorithm with') parser.add_argument('-t', dest = 'trajectoryType', help = 'type of trajectories to process', choices = ['feature', 'object'], default = 'feature') parser.add_argument('--nfeatures-per-object', dest = 'nLongestFeaturesPerObject', help = 'maximum number of features per object to load', type = int) parser.add_argument('-n', dest = 'nObjects', help = 'number of the object or feature trajectories to load', type = int, default = None) parser.add_argument('-e', dest = 'epsilon', help = 'distance for the similarity of trajectory points', type = float, required = True) parser.add_argument('--metric', dest = 'metric', help = 'metric for the similarity of trajectory points', default = 'cityblock') # default is manhattan distance parser.add_argument('-s', dest = 'minSimilarity', help = 'minimum similarity to put a trajectory in a cluster', type = float, required = True) #parser.add_argument('-c', dest = 'minClusterSize', help = 'minimum cluster size', type = int, default = 0) parser.add_argument('--learn', dest = 'learn', help = 'learn', action = 'store_true') parser.add_argument('--optimize', dest = 'optimizeCentroid', help = 'recompute centroid at each assignment', action = 'store_true') parser.add_argument('--random', dest = 'randomInitialization', help = 'random initialization of clustering algorithm', action = 'store_true') parser.add_argument('--subsample', dest = 'positionSubsamplingRate', help = 'rate of position subsampling (1 every n positions)', type = int) parser.add_argument('--display', dest = 'display', help = 'display trajectories', action = 'store_true') parser.add_argument('--similarities-filename', dest = 'similaritiesFilename', help = 'filename of the similarities') parser.add_argument('--save-similarities', dest = 'saveSimilarities', help = 'save computed similarities (in addition to prototypes)', action = 'store_true') parser.add_argument('--save-assignments', dest = 'saveAssignments', help = 'saves the assignments of the objects to the prototypes', action = 'store_true') parser.add_argument('--assign', dest = 'assign', help = 'assigns the objects to the prototypes and saves the assignments', action = 'store_true') args = parser.parse_args() # use cases # 1. learn proto from one file, save in same or another # 2. load proto, load objects (from same or other db), update proto matchings, save proto # TODO 3. on same dataset, learn and assign trajectories (could be done with min cluster size) # TODO? 4. when assigning, allow min cluster size only to avoid assigning to small clusters (but prototypes are not removed even if in small clusters, can be done after assignment with nmatchings) # TODO add possibility to cluster with velocities # TODO add possibility to load all trajectories and use minclustersize if args.learn and args.assign: print('Cannot learn and assign simultaneously') sys.exit(0) objects = storage.loadTrajectoriesFromSqlite(args.databaseFilename, args.trajectoryType, args.nObjects, timeStep = args.positionSubsamplingRate, nLongestFeaturesPerObject = args.nLongestFeaturesPerObject) if args.trajectoryType == 'object' and args.nLongestFeaturesPerObject is not None: objectsWithFeatures = objects objects = [f for o in objectsWithFeatures for f in o.getFeatures()] prototypeType = 'feature' else: prototypeType = args.trajectoryType # load initial prototypes, if any if args.inputPrototypeDatabaseFilename is not None: initialPrototypes = storage.loadPrototypesFromSqlite(args.inputPrototypeDatabaseFilename, True) else: initialPrototypes = [] lcss = utils.LCSS(metric = args.metric, epsilon = args.epsilon) similarityFunc = lambda x,y : lcss.computeNormalized(x, y) nTrajectories = len(initialPrototypes)+len(objects) if args.similaritiesFilename is not None: similarities = np.loadtxt(args.similaritiesFilename) if args.similaritiesFilename is None or similarities.shape[0] != nTrajectories or similarities.shape[1] != nTrajectories: similarities = -np.ones((nTrajectories, nTrajectories)) prototypeIndices, labels = processing.learnAssignMotionPatterns(args.learn, args.assign, objects, similarities, args.minSimilarity, similarityFunc, 0, args.optimizeCentroid, args.randomInitialization, False, initialPrototypes) if args.learn:# and not args.assign: prototypes = [] for i in prototypeIndices: if i<len(initialPrototypes): prototypes.append(initialPrototypes[i]) else: prototypes.append(moving.Prototype(args.databaseFilename, objects[i-len(initialPrototypes)].getNum(), prototypeType)) if args.outputPrototypeDatabaseFilename is None: outputPrototypeDatabaseFilename = args.databaseFilename else: outputPrototypeDatabaseFilename = args.outputPrototypeDatabaseFilename if args.inputPrototypeDatabaseFilename == args.outputPrototypeDatabaseFilename: storage.deleteFromSqlite(args.outputPrototypeDatabaseFilename, 'prototype') storage.savePrototypesToSqlite(outputPrototypeDatabaseFilename, prototypes) if args.display: plt.figure() for p in prototypes: p.getMovingObject().plot() plt.axis('equal') plt.show() if args.assign: # not args.learn and no modification to prototypes, can work with initialPrototypes clusterSizes = ml.computeClusterSizes(labels, prototypeIndices, -1) for i in prototypeIndices: nMatchings = clusterSizes[i]-1 # external prototypes if initialPrototypes[i].nMatchings is None: initialPrototypes[i].nMatchings = nMatchings else: initialPrototypes[i].nMatchings += nMatchings if args.outputPrototypeDatabaseFilename is None: outputPrototypeDatabaseFilename = args.databaseFilename else: outputPrototypeDatabaseFilename = args.outputPrototypeDatabaseFilename storage.setPrototypeMatchingsInSqlite(outputPrototypeDatabaseFilename, initialPrototypes) if args.saveAssignments: if args.trajectoryType == 'object' and args.nLongestFeaturesPerObject is not None: # consider that the object is assigned through its longest features # issues are inconsistencies in the number of matchings per prototype and display (will display features, not objects) objectNumbers = [] objectLabels = [] i = 0 for obj in objectsWithFeatures: objLabels = [] for f in obj.getFeatures(): if f == objects[i]: objLabels.append(labels[i+len(initialPrototypes)]) i += 1 else: print('Issue with obj {} and feature {} (trajectory {})'.format(obj.getNum(), f.getNum(), i)) objectLabels.append(utils.mostCommon(objLabels)) objectNumbers.append(obj.getNum()) storage.savePrototypeAssignmentsToSqlite(args.databaseFilename, objectNumbers, 'object', objectLabels, initialPrototypes) else: storage.savePrototypeAssignmentsToSqlite(args.databaseFilename, [obj.getNum() for obj in objects], args.trajectoryType, labels[len(initialPrototypes):], initialPrototypes) if args.display: plt.figure() for i,o in enumerate(objects): if labels[i+len(initialPrototypes)] < 0: o.plot('kx-') else: o.plot(utils.colors[labels[i+len(initialPrototypes)]]) for i,p in enumerate(initialPrototypes): p.getMovingObject().plot(utils.colors[i]+'o') plt.axis('equal') plt.show() if (args.learn or args.assign) and args.saveSimilarities: if args.similaritiesFilename is not None: np.savetxt(args.similaritiesFilename, similarities, '%.4f') else: np.savetxt(utils.removeExtension(args.databaseFilename)+'-prototype-similarities.txt.gz', similarities, '%.4f')