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annotate python/metadata.py @ 491:343cfd185ca6

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minor changes and reaarrangements
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 16 Apr 2014 17:43:53 -0400
parents 334e1151828b
children 1262faae12e7
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1 # from moving import Point
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2
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3 from datetime import datetime
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4 from os import path
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5
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6 from sqlalchemy import create_engine, Column, Integer, Float, DateTime, String, ForeignKey
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7 from sqlalchemy.orm import relationship, backref, sessionmaker
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8 from sqlalchemy.ext.declarative import declarative_base
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9
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10 from utils import datetimeFormat
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11
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12 Base = declarative_base()
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13
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14 class Site(Base):
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15 __tablename__ = 'sites'
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16 id = Column(Integer, primary_key=True)
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17 name = Column(String) # same as path, relative to the database position
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18 description = Column(String) # longer names, eg intersection of road1 and road2
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19 xcoordinate = Column(Float) # ideally moving.Point, but needs to be
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20 ycoordinate = Column(Float)
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21
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22 def __init__(self, name, description = "", xcoordinate = None, ycoordinate = None):
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23 self.name = name
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24 self.description = description
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25 self.xcoordinate = xcoordinate
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26 self.ycoordinate = ycoordinate
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28 def getFilename(self):
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29 return self.name
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30
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31 class EnvironementalFactors(Base):
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32 '''Represents any environmental factors that may affect the results, in particular
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33 * changing weather conditions
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34 * changing road configuration, geometry, signalization, etc.
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35 ex: sunny, rainy, before counter-measure, after counter-measure'''
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36 __tablename__ = 'environmental_factors'
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37 id = Column(Integer, primary_key=True)
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38 startTime = Column(DateTime)
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39 endTime = Column(DateTime)
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40 description = Column(String) # eg sunny, before, after
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41 siteId = Column(Integer, ForeignKey('sites.id'))
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43 site = relationship("Site", backref=backref('environmental_factors', order_by = id))
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45 def __init__(self, startTime, endTime, description, site):
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46 'startTime is passed as string in utils.datetimeFormat, eg 2011-06-22 10:00:39'
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47 self.startTime = datetime.strptime(startTime, datetimeFormat)
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48 self.endTime = datetime.strptime(endTime, datetimeFormat)
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49 self.description = description
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50 self.site = site
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51
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52 class CameraView(Base):
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53 __tablename__ = 'camera_views'
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54 id = Column(Integer, primary_key=True)
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55 frameRate = Column(Float)
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56 homographyFilename = Column(String) # path to homograph filename, relative to the site name
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57 cameraCalibrationFilename = Column(String) # path to full camera calibration, relative to the site name
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58 siteId = Column(Integer, ForeignKey('sites.id'))
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59 homographyDistanceUnit = Column(String, default = 'm') # make sure it is default in the database
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60 configurationFilename = Column(String) # path to configuration .cfg file, relative to site name
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62 site = relationship("Site", backref=backref('camera_views', order_by = id))
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63
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64 def __init__(self, frameRate, homographyFilename, cameraCalibrationFilename, site, configurationFilename):
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65 self.frameRate = frameRate
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66 self.homographyFilename = homographyFilename
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67 self.site = site
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68 self.configurationFilename = configurationFilename
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69
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70 def getHomographyFilename(self, relativeToSiteFilename = True):
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71 if relativeToSiteFilename:
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72 return self.site.getFilename()+path.sep+self.homographyFilename
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73 else:
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74 return self.homographyFilename
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75
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76 class VideoSequence(Base):
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77 __tablename__ = 'video_sequences'
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78 id = Column(Integer, primary_key=True)
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79 name = Column(String) # path relative to the the site name
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80 startTime = Column(DateTime)
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81 duration = Column(Float) # video sequence duration
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82 durationUnit = Column(String, default = 's')
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83 siteId = Column(Integer, ForeignKey('sites.id'))
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84 cameraViewId = Column(Integer, ForeignKey('camera_views.id'))
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85 configurationFilename = Column(String)
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86
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87 site = relationship("Site", backref=backref('video_sequences', order_by = id))
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88 cameraView = relationship("CameraView", backref=backref('video_sequences', order_by = id))
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89
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90 def __init__(self, name, startTime, duration, site, cameraView, configurationFilename = None):
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91 'startTime is passed as string in utils.datetimeFormat, eg 2011-06-22 10:00:39'
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92 self.name = name
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93 self.startTime = datetime.strptime(startTime, datetimeFormat)
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94 self.duration = duration
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95 self.site = site
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96 self.cameraView = cameraView
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97 self.configurationFilename = configurationFilename
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98
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99 def getVideoSequenceFilename(self, relativeToSiteFilename = True):
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100 if relativeToSiteFilename:
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101 return self.site.getFilename()+path.sep+self.name
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102 else:
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103 return self.name
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104
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105 #def getConfigurationFilename(self):
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106 #'returns the local configuration filename, or the one of the camera view otherwise'
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107
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108 # add class for Analysis: foreign key VideoSequenceId, dataFilename, configFilename (get the one from camera view by default), mask? (no, can be referenced in the tracking cfg file)
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109
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110 # class SiteDescription(Base): # list of lines and polygons describing the site, eg for sidewalks, center lines
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111
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112 # class Analysis(Base): # parameters necessary for processing the data: free form
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113 # eg bounding box depends on camera view, tracking configuration depends on camera view
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114 # results: sqlite
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115
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116 def createDatabase(filename):
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117 'creates a session to query the filename'
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118 engine = create_engine('sqlite:///'+filename)
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119 Base.metadata.create_all(engine)
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120 Session = sessionmaker(bind=engine)
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121 return Session()
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122
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123 def connectDatabase(filename):
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124 'creates a session to query the filename'
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125 engine = create_engine('sqlite:///'+filename)
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126 Session = sessionmaker(bind=engine)
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127 return Session()
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128
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129 def initializeSites(session, directoryName):
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130 '''Initializes default site objects and Camera Views
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131
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132 eg somedirectory/montreal/ contains intersection1, intersection2, etc.
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133 The site names would be somedirectory/montreal/intersection1, somedirectory/montreal/intersection2, etc.'''
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parents: 425
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134 from os import listdir, path
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parents: 425
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135 sites = []
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents: 425
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136 cameraViews = []
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents: 425
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137 names = listdir(directoryName)
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
Nicolas Saunier <nicolas.saunier@polymtl.ca>
parents: 425
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138 for name in names:
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
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parents: 425
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139 if path.isdir(directoryName+'/'+name):
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parents: 425
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140 sites.append(Site(directoryName+'/'+name, None))
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
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parents: 425
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141 cameraViews.append(CameraView(-1, None, None, sites[-1], None))
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parents: 425
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142 session.add_all(sites)
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parents: 425
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143 session.add_all(cameraViews)
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parents: 425
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144 session.commit()
334e1151828b corrected creation and connection to database + helper function to generate sites and camera views
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parents: 425
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145 # TODO crawler for video files?