balthazarneveu
commented
1 year ago Special Exiftool config to write the dedicated XMP tags!
#------------------------------------------------------------------------------
# File: pix4d.config
#
# Description: This config file contains tag definitions needed to be able
# to write Pix4D XMP-Camera tags
#
# Usage: exiftool -config pix4d.config -XMP-camera:TAG=VAL ...
#
# Requires: ExifTool version 7.00 or later
#
# References: 1) https://support.pix4d.com/hc/en-us/articles/360016450032-Specifications-of-xmpcamera-tags
#
# Revisions: 2017/12/08 - P. Harvey Created
# 2020/04/02 - PH Updated to current specification
#------------------------------------------------------------------------------
%Image::ExifTool::UserDefined = (
'Image::ExifTool::XMP::Main' => {
Camera => {
SubDirectory => {
TagTable => 'Image::ExifTool::UserDefined::Camera',
},
},
},
);
%Image::ExifTool::UserDefined::Camera = (
GROUPS => { 0 => 'XMP', 1 => 'XMP-Camera', 2 => 'Camera' },
NAMESPACE => { 'Camera' => 'http://pix4d.com/camera/1.0/' },
WRITABLE => 'string',
Yaw => { Writable => 'real' },
Pitch => { Writable => 'real' },
Roll => { Writable => 'real' },
IMUSampleSize => { Writable => 'integer' },
IMUTimeOffset => { Writable => 'integer' },
LineReadoutTime => { Writable => 'integer' },
IMUFrequency => { Writable => 'real' },
PrincipalPoint => { },
ModelType => { },
PerspectiveFocalLength => { Writable => 'real' },
PerspectiveDistortion => { },
IMULinearVelocity => { },
GPSXYAccuracy => { Writable => 'real' },
GPSZAccuracy => { Writable => 'real' },
FlightUUID => { },
CentralWaveLength => { },
BandName => { List => 'Seq' },
RigName => { },
RigCameraIndex => { Writable => 'integer' },
BandName => { List => 'Seq' },
IMUAngularVelocity => {
Binary => 1,
ValueConv => 'Image::ExifTool::XMP::DecodeBase64($val)',
ValueConvInv => 'Image::ExifTool::XMP::EncodeBase64($val)',
},
# added 2020/04/02 (ref 1)
FisheyeAffineMatrix => { },
FisheyeAffineSymmetric => { },
FisheyePolynomial => { },
RigRelatives => { },
PerspectiveFocalLengthUnits => { },
CaptureUUID => { },
CentralWavelength => { List => 'Seq' },
WavelengthFWHM => { List => 'Seq' },
BlackCurrent => { List => 'Seq' },
BandSensitivity => { List => 'Seq' },
SunSensor => { List => 'Seq' },
SunSensorExposureTime => { List => 'Seq' },
SunSensorSensitivity => { List => 'Seq' },
InvalidPixel => { List => 'Seq' },
VignettingPolynomial => { List => 'Seq' },
VignettingCenter => { List => 'Seq' },
VignettingPolynomial2DName => { List => 'Seq' },
VignettingPolynomial2D => { List => 'Seq' },
ColorTransform => { List => 'Seq' },
IsNormalized => { },
Albedo => { List => 'Seq' },
ReflectArea => { List => 'Seq' },
CalibrationPicture => { Writable => 'integer' },
GyroRate => { Writable => 'real' },
IMUPitchAccuracy => { Writable => 'real' },
IMURollAccuracy => { Writable => 'real' },
IMUYawAccuracy => { Writable => 'real' },
NominalCameraDistance => { Writable => 'real' },
AboveGroundAltitude => { Writable => 'real' },
SunSensorYaw => { Writable => 'real' },
SunSensorPitch => { Writable => 'real' },
SunSensorRoll => { Writable => 'real' },
SunSensorRelativeRotation => { Writable => 'real', List => 'Seq' },
TransformAlpha => { List => 'Seq' },
TransformBeta => { List => 'Seq' },
TransformGamma => { List => 'Seq' },
SensorBitDepth => { Writable => 'integer' },
SensorTemperature => { Writable => 'real' },
# (ref https://community.pix4d.com/t/camera-sun-irradiance-and-sun-angle-in-red-text/3290)
IrradianceRelativeRotation => { },
);
1; #end
Here's the Micasense samples processed by ODM then displayed in QGIS
NIR band in QGIS - perfectly aligned with visible
VS
👍 WebODM supports our multispectral TIFs 👍 
AlainNeveu
There is an expected support for multispectral images in ODM as per ODM's doc and as from PR-1057 To enable the mode, it seems like XMP tags are required, A good way would be to use exif tool + custom configuration ( see for instance using config files in exiftool
Specific XMP tags need to be in the images exif Camera:BandName.
Please see this thread multispectral photo
=========================== Update: After testing with the micasense samples provided in the odmdata, I was able to run ODM throug this samples with enabled multi-spectral process and the orthophoto has the 6 bands showing in QGIS.
TODO
Camera:BandName🆗To know if you prepared your data correctly you should try to spot this line in the ODM logs
[INFO] Reconstruction will use 42 images from auto bandOption :
skip_band_alignmentmay allow to disable another pointless homography estimation in our case where everything has already been aligned run_opensfm.py line 167