kopia lustrzana https://github.com/OpenDroneMap/ODM
50 wiersze
2.3 KiB
Python
50 wiersze
2.3 KiB
Python
from PIL import Image
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import numpy as np
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from opendm import system
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from opendm import log
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from opendm.thermal_tools.thermal_utils import sensor_vals_to_temp
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def extract_temperatures_dji(photo, image, dataset_tree):
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"""Extracts the DJI-encoded thermal image as 2D floating-point numpy array with temperatures in degC.
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The raw sensor values are obtained using the sample binaries provided in the official Thermal SDK by DJI.
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The executable file is run and generates a 16 bit unsigned RAW image with Little Endian byte order.
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Link to DJI Forum post: https://forum.dji.com/forum.php?mod=redirect&goto=findpost&ptid=230321&pid=2389016
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"""
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# Hardcoded metadata for mean of values
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# This is added to support the possibility of extracting RJPEG from DJI M2EA
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meta = {
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"Emissivity": 0.95,
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"ObjectDistance": 50, #This is mean value of flights for better results. Need to be changed later, or improved by bypassing options from task broker
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"AtmosphericTemperature": 20,
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"ReflectedApparentTemperature": 30,
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"IRWindowTemperature": 20,
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"IRWindowTransmission": 1,
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"RelativeHumidity": 40,
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"PlanckR1": 21106.77,
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"PlanckB": 1501,
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"PlanckF": 1,
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"PlanckO": -7340,
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"PlanckR2": 0.012545258,
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}
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if photo.camera_model == "MAVIC2-ENTERPRISE-ADVANCED":
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# Adding support for MAVIC2-ENTERPRISE-ADVANCED Camera images
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im = Image.open(f"{dataset_tree}/{photo.filename}")
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# concatenate APP3 chunks of data
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a = im.applist[3][1]
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for i in range(4, 14):
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a += im.applist[i][1]
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# create image from bytes
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try:
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img = Image.frombytes("I;16L", (640, 512), a)
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except ValueError as e:
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log.ODM_ERROR("Error during extracting temperature values for file %s : %s" % photo.filename, e)
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else:
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log.ODM_DEBUG("Only DJI M2EA currently supported, please wait for new updates")
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return image
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# Extract raw sensor values from generated image into numpy array
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raw_sensor_np = np.array(img)
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## extracting the temperatures from thermal images
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thermal_np = sensor_vals_to_temp(raw_sensor_np, **meta)
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return thermal_np |