Project: Photogrammetry-Pre-Processor
Source: open_heritage_software_project_scopes.md — Project 20
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CONTEXT:
I am building a photogrammetry pre-processing utility for archaeologists and palaeontologists. I need research:

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RESEARCH PROMPT 5:

**Colour calibration targets**: What colour calibration targets are used in archaeological photography (X-Rite ColorChecker, SpyderCHECKR, custom grey cards)? How are they detected in images using OpenCV? What colour correction transforms are applied once a target is detected?
