kopia lustrzana https://github.com/OpenDroneMap/ODM
411 wiersze
16 KiB
Python
411 wiersze
16 KiB
Python
import io
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import logging
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import re
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import exifread
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import numpy as np
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from six import string_types
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from datetime import datetime, timedelta
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import pytz
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from opendm import log
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from opendm import system
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import xmltodict as x2d
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from opendm import get_image_size
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from xml.parsers.expat import ExpatError
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class ODM_Photo:
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""" ODMPhoto - a class for ODMPhotos
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"""
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def __init__(self, path_file):
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# Standard tags (virtually all photos have these)
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self.filename = io.extract_file_from_path_file(path_file)
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self.width = None
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self.height = None
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self.camera_make = ''
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self.camera_model = ''
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# Geo tags
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self.latitude = None
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self.longitude = None
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self.altitude = None
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# Multi-band fields
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self.band_name = 'RGB'
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self.band_index = 0
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# Multi-spectral fields
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self.fnumber = None
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self.radiometric_calibration = None
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self.black_level = None
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# Capture info
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self.exposure_time = None
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self.iso_speed = None
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self.bits_per_sample = None
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self.vignetting_center = None
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self.vignetting_polynomial = None
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self.spectral_irradiance = None
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self.horizontal_irradiance = None
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self.irradiance_scale_to_si = None
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self.utc_time = None
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# DLS
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self.sun_sensor = None
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self.dls_yaw = None
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self.dls_pitch = None
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self.dls_roll = None
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# self.center_wavelength = None
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# self.bandwidth = None
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# RTK
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self.gps_xy_stddev = None # Dilution of Precision X/Y
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self.gps_z_stddev = None # Dilution of Precision Z
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# parse values from metadata
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self.parse_exif_values(path_file)
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# print log message
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log.ODM_DEBUG('Loaded {}'.format(self))
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def __str__(self):
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return '{} | camera: {} {} | dimensions: {} x {} | lat: {} | lon: {} | alt: {} | band: {} ({})'.format(
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self.filename, self.camera_make, self.camera_model, self.width, self.height,
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self.latitude, self.longitude, self.altitude, self.band_name, self.band_index)
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def parse_exif_values(self, _path_file):
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# Disable exifread log
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logging.getLogger('exifread').setLevel(logging.CRITICAL)
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with open(_path_file, 'rb') as f:
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tags = exifread.process_file(f, details=False)
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try:
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if 'Image Make' in tags:
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try:
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self.camera_make = tags['Image Make'].values.encode('utf8')
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except UnicodeDecodeError:
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log.ODM_WARNING("EXIF Image Make might be corrupted")
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self.camera_make = "unknown"
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if 'Image Model' in tags:
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try:
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self.camera_model = tags['Image Model'].values.encode('utf8')
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except UnicodeDecodeError:
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log.ODM_WARNING("EXIF Image Model might be corrupted")
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self.camera_model = "unknown"
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if 'GPS GPSAltitude' in tags:
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self.altitude = self.float_value(tags['GPS GPSAltitude'])
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if 'GPS GPSAltitudeRef' in tags and self.int_value(tags['GPS GPSAltitudeRef']) > 0:
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self.altitude *= -1
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if 'GPS GPSLatitude' in tags and 'GPS GPSLatitudeRef' in tags:
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self.latitude = self.dms_to_decimal(tags['GPS GPSLatitude'], tags['GPS GPSLatitudeRef'])
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if 'GPS GPSLongitude' in tags and 'GPS GPSLongitudeRef' in tags:
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self.longitude = self.dms_to_decimal(tags['GPS GPSLongitude'], tags['GPS GPSLongitudeRef'])
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except IndexError as e:
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log.ODM_WARNING("Cannot read basic EXIF tags for %s: %s" % (_path_file, e.message))
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try:
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if 'Image Tag 0xC61A' in tags:
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self.black_level = self.list_values(tags['Image Tag 0xC61A'])
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elif 'BlackLevel' in tags:
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self.black_level = self.list_values(tags['BlackLevel'])
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if 'EXIF ExposureTime' in tags:
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self.exposure_time = self.float_value(tags['EXIF ExposureTime'])
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if 'EXIF FNumber' in tags:
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self.fnumber = self.float_value(tags['EXIF FNumber'])
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if 'EXIF ISOSpeed' in tags:
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self.iso_speed = self.int_value(tags['EXIF ISOSpeed'])
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elif 'EXIF PhotographicSensitivity' in tags:
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self.iso_speed = self.int_value(tags['EXIF PhotographicSensitivity'])
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elif 'EXIF ISOSpeedRatings' in tags:
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self.iso_speed = self.int_value(tags['EXIF ISOSpeedRatings'])
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if 'Image BitsPerSample' in tags:
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self.bits_per_sample = self.int_value(tags['Image BitsPerSample'])
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if 'EXIF DateTimeOriginal' in tags:
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str_time = tags['EXIF DateTimeOriginal'].values.encode('utf8')
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utc_time = datetime.strptime(str_time, "%Y:%m:%d %H:%M:%S")
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subsec = 0
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if 'EXIF SubSecTime' in tags:
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subsec = self.int_value(tags['EXIF SubSecTime'])
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negative = 1.0
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if subsec < 0:
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negative = -1.0
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subsec *= -1.0
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subsec = float('0.{}'.format(int(subsec)))
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subsec *= negative
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ms = subsec * 1e3
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utc_time += timedelta(milliseconds = ms)
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timezone = pytz.timezone('UTC')
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epoch = timezone.localize(datetime.utcfromtimestamp(0))
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self.utc_time = (timezone.localize(utc_time) - epoch).total_seconds() * 1000.0
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except Exception as e:
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log.ODM_WARNING("Cannot read extended EXIF tags for %s: %s" % (_path_file, e.message))
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# Extract XMP tags
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f.seek(0)
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xmp = self.get_xmp(f)
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for tags in xmp:
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try:
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band_name = self.get_xmp_tag(tags, ['Camera:BandName', '@Camera:BandName'])
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if band_name is not None:
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self.band_name = band_name.replace(" ", "")
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self.set_attr_from_xmp_tag('band_index', tags, [
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'DLS:SensorId', # Micasense RedEdge
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'@Camera:RigCameraIndex', # Parrot Sequoia, Sentera 21244-00_3.2MP-GS-0001
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'Camera:RigCameraIndex', # MicaSense Altum
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])
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self.set_attr_from_xmp_tag('radiometric_calibration', tags, [
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'MicaSense:RadiometricCalibration',
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])
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self.set_attr_from_xmp_tag('vignetting_center', tags, [
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'Camera:VignettingCenter',
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'Sentera:VignettingCenter',
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])
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self.set_attr_from_xmp_tag('vignetting_polynomial', tags, [
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'Camera:VignettingPolynomial',
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'Sentera:VignettingPolynomial',
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])
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self.set_attr_from_xmp_tag('horizontal_irradiance', tags, [
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'Camera:HorizontalIrradiance'
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], float)
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self.set_attr_from_xmp_tag('irradiance_scale_to_si', tags, [
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'Camera:IrradianceScaleToSIUnits'
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], float)
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self.set_attr_from_xmp_tag('sun_sensor', tags, [
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'Camera:SunSensor',
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], float)
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self.set_attr_from_xmp_tag('spectral_irradiance', tags, [
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'Camera:SpectralIrradiance',
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'Camera:Irradiance',
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], float)
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# Phantom 4 RTK
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if '@drone-dji:RtkStdLon' in tags:
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y = float(self.get_xmp_tag(tags, '@drone-dji:RtkStdLon'))
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x = float(self.get_xmp_tag(tags, '@drone-dji:RtkStdLat'))
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self.gps_xy_stddev = max(x, y)
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if '@drone-dji:RtkStdHgt' in tags:
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self.gps_z_stddev = float(self.get_xmp_tag(tags, '@drone-dji:RtkStdHgt'))
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else:
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self.set_attr_from_xmp_tag('gps_xy_stddev', tags, [
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'@Camera:GPSXYAccuracy',
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'GPSXYAccuracy'
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], float)
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self.set_attr_from_xmp_tag('gps_z_stddev', tags, [
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'@Camera:GPSZAccuracy',
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'GPSZAccuracy'
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], float)
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if 'DLS:Yaw' in tags:
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self.set_attr_from_xmp_tag('dls_yaw', tags, ['DLS:Yaw'], float)
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self.set_attr_from_xmp_tag('dls_pitch', tags, ['DLS:Pitch'], float)
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self.set_attr_from_xmp_tag('dls_roll', tags, ['DLS:Roll'], float)
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except Exception as e:
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log.ODM_WARNING("Cannot read XMP tags for %s: %s" % (_path_file, e.message))
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# self.set_attr_from_xmp_tag('center_wavelength', tags, [
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# 'Camera:CentralWavelength'
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# ], float)
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# self.set_attr_from_xmp_tag('bandwidth', tags, [
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# 'Camera:WavelengthFWHM'
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# ], float)
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self.width, self.height = get_image_size.get_image_size(_path_file)
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# Sanitize band name since we use it in folder paths
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self.band_name = re.sub('[^A-Za-z0-9]+', '', self.band_name)
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def set_attr_from_xmp_tag(self, attr, xmp_tags, tags, cast=None):
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v = self.get_xmp_tag(xmp_tags, tags)
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if v is not None:
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if cast is None:
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setattr(self, attr, v)
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else:
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setattr(self, attr, cast(v))
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def get_xmp_tag(self, xmp_tags, tags):
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if isinstance(tags, str):
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tags = [tags]
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for tag in tags:
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if tag in xmp_tags:
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t = xmp_tags[tag]
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if isinstance(t, string_types):
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return str(t)
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elif isinstance(t, dict):
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items = t.get('rdf:Seq', {}).get('rdf:li', {})
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if items:
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if isinstance(items, string_types):
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return items
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return " ".join(items)
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elif isinstance(t, int) or isinstance(t, float):
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return t
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# From https://github.com/mapillary/OpenSfM/blob/master/opensfm/exif.py
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def get_xmp(self, file):
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img_str = str(file.read())
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xmp_start = img_str.find('<x:xmpmeta')
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xmp_end = img_str.find('</x:xmpmeta')
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if xmp_start < xmp_end:
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xmp_str = img_str[xmp_start:xmp_end + 12]
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try:
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xdict = x2d.parse(xmp_str)
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except ExpatError:
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from bs4 import BeautifulSoup
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xmp_str = str(BeautifulSoup(xmp_str, 'xml'))
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xdict = x2d.parse(xmp_str)
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log.ODM_WARNING("%s has malformed XMP XML (but we fixed it)" % self.filename)
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xdict = xdict.get('x:xmpmeta', {})
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xdict = xdict.get('rdf:RDF', {})
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xdict = xdict.get('rdf:Description', {})
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if isinstance(xdict, list):
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return xdict
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else:
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return [xdict]
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else:
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return []
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def dms_to_decimal(self, dms, sign):
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"""Converts dms coords to decimal degrees"""
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degrees, minutes, seconds = self.float_values(dms)
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return (-1 if sign.values[0] in 'SWsw' else 1) * (
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degrees +
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minutes / 60 +
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seconds / 3600
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)
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def float_values(self, tag):
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if isinstance(tag.values, list):
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return map(lambda v: float(v.num) / float(v.den), tag.values)
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else:
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return [float(tag.values.num) / float(tag.values.den)]
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def float_value(self, tag):
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v = self.float_values(tag)
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if len(v) > 0:
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return v[0]
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def int_values(self, tag):
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if isinstance(tag.values, list):
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return map(int, tag.values)
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else:
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return [int(tag.values)]
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def int_value(self, tag):
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v = self.int_values(tag)
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if len(v) > 0:
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return v[0]
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def list_values(self, tag):
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return " ".join(map(str, tag.values))
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def get_radiometric_calibration(self):
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if isinstance(self.radiometric_calibration, str):
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parts = self.radiometric_calibration.split(" ")
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if len(parts) == 3:
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return list(map(float, parts))
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return [None, None, None]
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def get_dark_level(self):
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if self.black_level:
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levels = np.array([float(v) for v in self.black_level.split(" ")])
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return levels.mean()
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def get_gain(self):
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#(gain = ISO/100)
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if self.iso_speed:
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return self.iso_speed / 100.0
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def get_vignetting_center(self):
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if self.vignetting_center:
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parts = self.vignetting_center.split(" ")
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if len(parts) == 2:
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return list(map(float, parts))
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return [None, None]
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def get_vignetting_polynomial(self):
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if self.vignetting_polynomial:
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parts = self.vignetting_polynomial.split(" ")
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if len(parts) > 0:
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coeffs = list(map(float, parts))
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# Different camera vendors seem to use different ordering for the coefficients
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if self.camera_make != "Sentera":
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coeffs.reverse()
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return coeffs
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def get_utc_time(self):
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if self.utc_time:
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return datetime.utcfromtimestamp(self.utc_time / 1000)
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def get_photometric_exposure(self):
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# H ~= (exposure_time) / (f_number^2)
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if self.fnumber is not None and self.exposure_time > 0:
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return self.exposure_time / (self.fnumber * self.fnumber)
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def get_horizontal_irradiance(self):
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if self.horizontal_irradiance is not None:
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scale = 1.0 # Assumed
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if self.irradiance_scale_to_si is not None:
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scale = self.irradiance_scale_to_si
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return self.horizontal_irradiance * scale
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def get_sun_sensor(self):
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if self.sun_sensor is not None:
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# TODO: Presence of XMP:SunSensorExposureTime
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# and XMP:SunSensorSensitivity might
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# require additional logic. If these two tags are present,
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# then sun_sensor is not in physical units?
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return self.sun_sensor / 65535.0 # normalize uint16 (is this correct?)
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elif self.spectral_irradiance is not None:
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scale = 1.0 # Assumed
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if self.irradiance_scale_to_si is not None:
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scale = self.irradiance_scale_to_si
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return self.spectral_irradiance * scale
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def get_dls_pose(self):
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if self.dls_yaw is not None:
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return [self.dls_yaw, self.dls_pitch, self.dls_roll]
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return [0.0, 0.0, 0.0]
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def get_bit_depth_max(self):
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if self.bits_per_sample:
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return float(2 ** self.bits_per_sample)
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return None
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def get_gps_dop(self):
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val = -9999
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if self.gps_xy_stddev is not None:
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val = self.gps_xy_stddev
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if self.gps_z_stddev is not None:
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val = max(val, self.gps_z_stddev)
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if val > 0:
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return val
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return None
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