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OnnxSharp

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ONNX format parsing and manipulation in C#.

// repository documentation

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|What        |Links and Status|
|---------------|------|
|`OnnxSharp`  |[![NuGet](https://img.shields.io/nuget/v/OnnxSharp)](https://www.nuget.org/packages/OnnxSharp/) [![Downloads](https://img.shields.io/nuget/dt/OnnxSharp)](https://www.nuget.org/packages/OnnxSharp/) |
|`dotnet-onnx`|[![NuGet](https://img.shields.io/nuget/v/dotnet-onnx)](https://www.nuget.org/packages/dotnet-onnx/) [![Downloads](https://img.shields.io/nuget/dt/dotnet-onnx)](https://www.nuget.org/packages/dotnet-onnx/) |

# `OnnxSharp` library and `dotnet-onnx` tool
ONNX format parsing and manipulation in C# and with command line .NET tool.

# Quick Guide
Install latest version of .NET:
* PowerShell (Windows): [https://dot.net/v1/dotnet-install.ps1](https://dot.net/v1/dotnet-install.ps1)
* Bash (Linux/macOS): [https://dot.net/v1/dotnet-install.sh](https://dot.net/v1/dotnet-install.sh)

#### Code
|What          |How                                         |
|--------------|---------------------------------------------------|
|Install       |`dotnet add PROJECT.csproj package OnnxSharp`|
|Parse         |`var model = ModelProto.Parser.ParseFromFile("mnist-8.onnx");`|
|Info          |`var info = model.Graph.Info();`|
|Clean         |`model.Graph.Clean();`|
|SetDim        |`model.Graph.SetDim();`|
|Write         |`model.WriteToFile("mnist-8-clean-dynamic.onnx");`|

#### Tool
|What          |How                     |
|--------------|----------------------------|
|Install       |`dotnet tool install dotnet-onnx -g`|
|Info          |`dotnet onnx info mnist-8.onnx`|
|Info          |`dotnet onnx info mnist-8.onnx`|
|Clean         |`dotnet onnx clean mnist-8.onnx mnist-8-clean.onnx`|
|SetDim        |`dotnet onnx setdim mnist-8.onnx mnist-8-setdim.onnx`|

# Source Code
Base functionality is based on:
```
.\protoc.exe .\onnx.proto3 --csharp_out=OnnxSharp
```
Everything else written in beautiful C# 9.0 as extensions to this.

# Example Code
```csharp
using Onnx;

// Examples see https://github.com/onnx/models
var onnxInputFilePath = @"mnist-8.onnx";

var model = ModelProto.Parser.ParseFromFile(onnxInputFilePath);

var graph = model.Graph;
// Clean graph e.g. remove initializers from inputs that may prevent constant folding
graph.Clean();
// Set dimension in graph to enable dynamic batch size during inference
graph.SetDim(dimIndex: 0, DimParamOrValue.New("N"));
// Get summarized info about the graph
var info = graph.Info();

System.Console.WriteLine(info);

model.WriteToFile(@"mnist-8-clean-dynamic-batch-size.onnx");
```

OnnxSharp

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