LibRawFileUnsupportedError: b'Unsupported file format or not RAW file'

[EelkeFolmer]

I'm using the code in this repo to load and analyze Altum data. I can load and process the example data and also the data provided here: https://www.micasense.com/altum-sample-data/. But when trying to plot images collected by a colleague I get the error LibRawFileUnsupportedError: b'Unsupported file format or not RAW file'.

img = Image(imageName)
img.plot_all();

I can load and display the images using Agisoft Metashape. Here is the output from exiftools. I'd appreciate a hint about the cause of the error.

ExifTool Version Number : 12.55
File Name : IMG_0001_2_P03.tif
Directory : .
File Size : 4.8 MB
File Modification Date/Time : 2023:02:10 22:07:00+01:00
File Access Date/Time : 2023:02:13 11:50:10+01:00
File Inode Change Date/Time : 2023:02:13 11:49:38+01:00
File Permissions : -rw-rw-r--
File Type : DNG
File Type Extension : dng
MIME Type : image/x-adobe-dng
Exif Byte Order : Little-endian (Intel, II)
Subfile Type : Full-resolution image
Image Width : 2064
Image Height : 1544
Bits Per Sample : 12
Compression : Uncompressed
Photometric Interpretation : BlackIsZero
Fill Order : Normal
Make : MicaSense
Camera Model Name : Altum
Strip Offsets : (Binary data 118 bytes, use -b option to extract)
Orientation : Horizontal (normal)
Samples Per Pixel : 1
Rows Per Strip : 100
Strip Byte Counts : (Binary data 111 bytes, use -b option to extract)
Planar Configuration : Chunky
Software : v2.1.1
Modify Date : 2022:06:26 23:07:43
XMP Toolkit : XMP Core 4.4.0
About : Pix4D Camera Information
Rig Name : Altum
Band Name : Green
Central Wavelength : 560
Wavelength FWHM : 27
Model Type : perspective
Principal Point : 3.56278,2.70154
Perspective Focal Length : 7.8059843175000001
Perspective Focal Length Units : mm
Perspective Distortion : -0.1345151, 0.26304250000000001, -0.20758579999999999, -2.548122e-06, -9.6569889999999998e-05
Vignetting Center : 1036.9016999999999, 770.3723
Vignetting Polynomial : 0.00042786449999999998, -2.8392950000000001e-06, 5.8780980000000004e-09, -7.6590080000000002e-12, 5.0153600000000003e-15, -1.2581069999999999e-18
Band Sensitivity : 0.13888992114747592
Rig Relatives : 0.000000, 0.000000, 0.000000
Rig Camera Index : 1
Rig Relatives Reference Rig Camera Index: 1
GPSXY Accuracy : 4294967.5
GPSZ Accuracy : 3750000.25
Irradiance : 13.627062081493545
Irradiance Yaw : -111.52722609029951
Irradiance Pitch : -0.46265103457485834
Irradiance Roll : 177.20084237738524
Boot Timestamp : 187
Radiometric Calibration : 0.0001133038, 4.2489580000000004e-09, -1.1908520000000001e-06
Imager Temperature C : 31.690000000000001
Flight Id : oZ8Gp2QK3f60ggtnD5MN
Capture Id : HVP15Y0AS5hMUEc0SaZJ
Trigger Method : 1
Pressure Alt : 0
Dark Row Value : 239, 239, 239, 239
Serial : DA03-2002194-MS
Sw Version : v1.2.4
Center Wavelength : 560
Bandwidth : 27
Time Stamp : 199431
Spectral Irradiance : 13.627062081493545
Horizontal Irradiance : -6.9280227701500339
Direct Irradiance : 18.46068361917915
Scattered Irradiance : 9.5338007010780128
Solar Elevation : -1.1011158013781095
Solar Azimuth : 5.7773031303765832
Estimated Direct Light Vector : 0.32201830482430677, -0.88116030343008589, -0.34620908569400449
Yaw : -1.9465173008918493
Pitch : -0.0080747838410894016
Roll : 3.0927381367928684
Exposure Time : 1/1793
F Number : 1.8
Exposure Program : Program AE
ISO Speed : 100
Exif Version : 0230
Date/Time Original : 2022:06:26 23:07:43
Create Date : 2022:06:26 23:07:43
Metering Mode : Multi-spot
Focal Length : 8.0 mm
Sub Sec Time : 608161320
Focal Plane X Resolution : 289.855072
Focal Plane Y Resolution : 289.855072
Focal Plane Resolution Unit : mm
Serial Number : AL05-1934195-SC
GPS Version ID : 2.2.0.0
GPS Latitude Ref : North
GPS Longitude Ref : East
GPS Altitude Ref : Above Sea Level
GPS Dilution Of Precision : 0
DNG Version : 1.2.0.0
DNG Backward Version : 1.2.0.0
Unique Camera Model : Micasense RedEdge
Black Level Repeat Dim : 2 2
Black Level : 300 300 300 300
Color Matrix 1 : 3.2406 undef undef undef 1.8758 0.0415 0.0557 undef 1.057
As Shot Neutral : 0.43948 1 0.67949
Opcode List 3 : [opcode 48739], [opcode 41327]
Aperture : 1.8
Image Size : 2064x1544
Megapixels : 3.2
Scale Factor To 35 mm Equivalent: 4.9
Shutter Speed : 1/1793
Modify Date : 2022:06:26 23:07:43.608161320
GPS Altitude : 0 m Above Sea Level
GPS Latitude : 0 deg 0' 0.00" N
GPS Longitude : 0 deg 0' 0.00" E
Circle Of Confusion : 0.006 mm
Field Of View : 49.6 deg
Focal Length : 8.0 mm (35 mm equivalent: 38.9 mm)
GPS Position : 0 deg 0' 0.00" N, 0 deg 0' 0.00" E
Hyperfocal Distance : 5.76 m