shoecomp++

This is an experimental fully-C++ version of the shoecomp application, with the user interface implemented using Dear ImGui, and hello_imgui -- it's just a fork of the hello_imgui_template repo.

MIT License. The goal is to explore how one can implement a minimal, fast, cross-platform C++ GUI application to visualize for shoeprint image alignment and comparisons.

Optional automatic point detection (ONNX Runtime)

shoecomp can run a YOLO-style object-detection model on the active image and drop each detected box center in as an annotation point (the model's class index maps to the point type for the current canvas kind). This feature is entirely optional: the app never builds or links against ONNX Runtime. Instead it looks for the runtime's shared library at startup (and whenever you switch canvas kinds) and enables the Detect Points button only if it is found. If the library is absent, the button stays disabled with a tooltip and nothing else changes.

To enable it:

1. Build-time (once, by a maintainer): vendor the ONNX Runtime C-API header at third_party/onnxruntime/onnxruntime_c_api.h, copied from a pinned onnxruntime release tag (e.g. v1.20.1, include/onnxruntime/core/session/onnxruntime_c_api.h). Only this single header is compiled in.

2. Run-time (by the user): download the matching prebuilt runtime for your platform from the onnxruntime releases (onnxruntime-linux-x64-<ver>.tgz, onnxruntime-win-x64-<ver>.zip, or onnxruntime-osx-<arch>-<ver>.tgz) and place the shared library next to the shoecomp executable:

   • Linux: libonnxruntime.so (or libonnxruntime.so.1)
   • Windows: onnxruntime.dll
   • macOS: libonnxruntime.dylib (inside shoecomp.app/Contents/Frameworks/, or set the env var below; a downloaded lib may need xattr -dr com.apple.quarantine).

   Alternatively, point the SHOECOMP_ONNXRUNTIME environment variable at the full path of the library.

The app targets the CPU execution provider by default and will opt into a GPU provider (CUDA / DirectML / CoreML) automatically if the loaded runtime build provides one, silently falling back to CPU otherwise. If the installed runtime is older than the vendored header's API version, the feature simply stays disabled.