Error exporting .cu3s file using example scripts: incorrect processing mode

[fernandoseara]

Hi,

I'm currently working with the Cuvis SDK and hyperspectral cameras. I'm testing the provided example EX03_exportMeasurement.py, and I'm trying to export a .cu3s file to other formats (such as .tiff or .csv).

However, when I run the script, I get an error saying that the processing mode does not match.

📄 What I did:
Installed the Cuvis C SDK properly (installer completed, environment variables set, Python wrapper working).

Used one of the provided example scripts (EX03_exportMeasurement.py).

Loaded a .cu3s file that was previously recorded using the camera with EX05_recordSingleImages.py.

❌ The error I get is something like:

❓ My questions:
Do I need to explicitly set the processing mode before exporting?

Does the .cu3s file need to be processed first before it can be exported?

Is there a complete working example that shows how to export a .cu3s step by step?

✅ Additional Info:
OS: Ubuntu 22.04

Cuvis SDK version: 'CUBERT SDK v. 3.3.3 build: b3633b410b18973fb67673ab67e2e2e49978a46e'

Python version: 3.10.12

Script used: EX03_exportMeasurement.py

[birkholz-cubert]

Hello,

you are right that the Measurement needs to be processed (ProcessingMode != Preview) before being exported.
When the measurements have been recorded and saved without going through the processing context, this step has not happened yet.
The easiest way for this would be to process it into raw mode (no ther references needed).

Some code for this can be found in example 2:

print("loading processing context...")
processingContext = cuvis.ProcessingContext(session)

print("maybe set some references...")
# processingContext.set_reference(dark, cuvis.ReferenceType.Dark)
# processingContext.set_reference(white, cuvis.ReferenceType.White)
# processingContext.set_reference(distance, cuvis.ReferenceType.Distance)

procArgs = cuvis.ProcessingArgs()
# Choose a processing mode depending on your setup
procArgs.processing_mode = cuvis.ProcessingMode.Raw

if processingContext.is_capable(mesu, procArgs):
    print("processing to mode {}...".format(procArgs.processing_mode))
    processingContext.set_processing_args(procArgs)
    mesu = processingContext.apply(mesu)

I hope this helps and let me know if you have any further questions.