onnx2tf is a production-ready ONNX to TensorFlow/TFLite conversion framework that employs a sophisticated pass-based optimization pipeline. The system converts ONNX models through preprocessing, lowering to an intermediate representation (ModelIR), applying 50+ optimization passes (layout transformation, operator fusion, quantization), and exporting to target formats including TFLite, SavedModel, PyTorch nn.Module, and TorchScript. Its architecture features clean separation between operator implementations, IR transformation passes, and backend-specific exporters, with the flatbuffer_direct backend providing 100x+ faster conversion by bypassing TensorFlow graph construction. The framework includes comprehensive accuracy validation tools, dynamic shape handling, and model surgery capabilities for intermediate layer extraction.
Netron is a cross-platform neural network model visualizer that supports a wide range of deep learning frameworks (ONNX, TensorFlow, PyTorch, CoreML, etc.). It operates as an Electron desktop application, a web app, and a Python-based CLI/server. The architecture is modular: each model format is handled by a dedicated `ModelFactory` class implementing `match()` and `open()` methods, which parse binary or protobuf/flatbuffers serialized models into a uniform internal graph representation (Model -> Graph -> Node -> Value/Tensor). The application provides interactive graph visualization with SVG rendering, attribute inspection, and export capabilities. While primarily an application, it contains substantial data-processing code for format parsing, tensor decoding, and schema-driven metadata handling. The codebase is well-structured with consistent patterns, though it exhibits some duplication across format parsers and experimental/partial support for minority formats. The Python server (`server.py`) and the core binary parsing libraries (`base.js`, `protobuf.js`, `flatbuffers.js`) are independently reusable.
This repository is a comprehensive collection of TensorFlow Lite example applications for on-device machine learning, covering tasks such as image classification, object detection, pose estimation, audio classification, BERT question answering, gesture recognition, and more. It provides complete Android (Kotlin/Java), iOS (Swift), Raspberry Pi, and web implementations, each demonstrating best practices for camera integration, hardware delegate selection, and real-time inference. Additionally, the repository includes the TensorFlow Lite Model Maker library, which offers high-level APIs for training and exporting custom TFLite models from user data, along with research/educational models (DenseNet, pix2pix, NMT). While the codebase shows some duplication across platforms and occasional legacy API usage, it remains a valuable reference for developers building edge ML applications.
This repository is a large model zoo (500+ models) focused on converting and quantizing pre-trained computer vision models for edge deployment across multiple frameworks (TFLite, ONNX, OpenVINO, CoreML, TensorRT). It provides hundreds of download scripts for pre-converted model files, conversion pipelines (PyTorch/ TensorFlow to ONNX/TFLite), and a modest set of inference demo scripts for real-time video processing. The repo is primarily a research/engineering resource for edge AI practitioners, not a software application. It exhibits heavy duplication across model directories, relies on an external S3 bucket for model distribution, and uses older framework versions (TensorFlow 1.x/2.x, ONNX opset 11-13). Despite these maintenance concerns, the systematic conversion workflow and post-processing ONNX subgraph generators (e.g., NMS, box decoding) represent reusable patterns for anyone building end-to-end inference pipelines. The repo is hybrid in nature: while classified as data_research due to its focus on pre-trained model artifacts and lack of original training code, it also contains application-like demo code and CLI entry points.