openvino/docs/IE_DG/ONNX_Support.md

ONNX format support in the OpenVINO™

Starting from the 2020.4 release, OpenVINO™ supports reading native ONNX models. Core::ReadNetwork() method provides a uniform way to read models from IR or ONNX format, it is a recommended approach to reading models. Example:

InferenceEngine::Core core;
auto network = core.ReadNetwork("model.onnx");

OpenVINO™ doesn't provide a mechanism to specify pre-processing (like mean values subtraction, reverse input channels) for the ONNX format. If an ONNX model contains dynamic shapes for input, please use the CNNNetwork::reshape method for shape specialization.

Unsupported types of tensors:

• string,
• complex64,
• complex128.