Rewrite imageProcessing app and adding parallelization

[servantftransperfect]

• Adding a new imageProcessing module with all the algorithms found previously in main_imageProcessing.cpp
• All algorithms are contained by classes derivated from class ImageProcess.
• Rewrite the main_imageProcessing.cpp to use these classes
• Added support for parallelization of compute on multiple devices.
• First parallelized chunk is computing the output sfmData and will dry run all the needed algorithms.

[Copilot]

Pull request overview

This pull request performs a major refactoring of the imageProcessing application, introducing a modular class-based architecture and adding support for parallelization across multiple devices. The changes bump the version from 3.4 to 4.0, reflecting significant breaking changes.

Changes:

• Introduced a new imageProcessing module with a class hierarchy where each processing algorithm is encapsulated in a separate ImageProcess subclass
• Rewrote main_imageProcessing.cpp to use the new modular architecture with a pipeline of processing steps
• Added parallelization support through range-based chunking, allowing the workload to be distributed across multiple iterations
• Removed support for processing individual images or folder inputs - now only accepts SfMData files as input

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 14 comments.

Show a summary per file

File	Description
src/software/utils/main_imageProcessing.cpp	Refactored main processing loop to use new class-based pipeline, added parallelization logic with dry-run support for metadata computation
src/aliceVision/imageProcessing/imageProcessing.hpp	Defines base ImageProcess class and all concrete processing step classes (exposure, resize, reorient, filters, etc.)
src/aliceVision/imageProcessing/imageProcessing.cpp	Implements core image processing algorithms using OpenImageIO
src/aliceVision/imageProcessing/imageProcessing_OpenCV.hpp	Defines OpenCV-dependent processing classes (bilateral filter, CLAHE, NLM denoising)
src/aliceVision/imageProcessing/imageProcessing_OpenCV.cpp	Implements OpenCV-based image processing algorithms
src/aliceVision/imageProcessing/CMakeLists.txt	Build configuration for the new imageProcessing library
src/aliceVision/CMakeLists.txt	Adds imageProcessing subdirectory to the build
src/software/utils/CMakeLists.txt	Links imageProcessing library to the main executable
meshroom/aliceVision/ImageProcessing.py	Updated Python integration to support parallelization and removed deprecated input options

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