photogram

photogrammetry pipeline

1. Conversion to DNG format

Convert all files to the widely used DNG raw photo format.

cd photogram/
for file in ./test_data/*.CR3; 
	do dnglab convert $file dng_data/${file%.CR3}.DNG;
done

The X-rite color palette is supported in darktable.

https://docs.darktable.org/usermanual/3.6/module-reference/processing-modules/color-calibration/#supported-color-checker-targets This states "If the lighting conditions are peculiar and far from standard illuminants, the color checker shot will be only usable as an ad-hoc profile for pictures taken in the same lighting conditions."
https://pixls.us/articles/profiling-a-camera-with-darktable-chart/

darktable-cli ...

https://towardsdatascience.com/how-to-cluster-images-based-on-visual-similarity-cd6e7209fe34
https://keras.io/examples/vision/semantic_image_clustering/

# python script using opencv
opencv?

Use ExifTool to extract the timestamp of photos, indentify to intervals by 1) setting manual threshold, or 2) fitting them into gmm distribution.

[DNGLAB] A tool for converting between raw formats, specifically here for CR3 -> DNG, since very few tools support CR3. Tested and working. Install from .deb or source.
EXIFTOOL Command line perl program for editing meta data (EXIF) on various file formats. A dependency of ART. Can be installed within conda.
ART This is a fork of RawTherapee, a windows-only tool for converting between different raw file formats. It is the only Linux software I have found that can load the proprietary Canon raw format CR3. Available install from APT.
[DARKTABLE] A lightroom-like raw photo viewer and editor. Can be used to apply color corrections. Has a command line utility darktable-cli that may be able to implement batch processing. Available install from APT.

DNGLAB -> DARKTABLE ->

Collect a set of images from the same sample.
Color correct and convert image to JPG
- X-RITE software (free but NOT LINUX)
- CRAW format (.CR3) is not supported by darktable.
Identify sets of images from the same angle.
- Image clustering analysis
Focus stacking of images from the same angle.
- Helicon Focus
- photoshop
- enfuse (free Linux)
Background removal
- Automate... maybe gimp or OpenCV
Build mesh model
- AGISOFT