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Unity3D-CameraOpticalFlow

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GPU Optical Flow on camera (webcam, kinect, Black Magic...)

// repository documentation

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# Unity3D-CameraOpticalFlow
![gif](https://i.imgur.com/9V83DvQ.gif)

*CameraOpticalFlow* is a GPU based optical flow system for unity.

### OpticalFlow.cs
This script computes an optical flow on GPU side.
It takes a RenderTexture as an input to analyze.
The result is returned as a RenderTexture in an ARGBFloat format.
You can grab the RenderTexture containing the OF from script by calling ```OpticalFlow.GetOpticalFlowMap()```

### OFTrailSystemUpdater.cs
This script compute an history trail from the optical flow.
It grab the result from ```OpticalFlow.cs```
The results is return as a CustomRenderTexture in an ARGBFloat format.
You could get the result of the OF from script by calling ```OFTrailSystemUpdater.GetOFTrail()```

### AverageVelocity.cs
This script compute the average velocity from the OF texture.
Please note: this computation can be pretty intensive as it loop over all the pixel of the image. Use it with a lower resolution defined by the var ```resolution```
The result can be grab using ```AverageVelocity.GetAverageVelocity()```
The ```AverageVelocity.GetAverageVelocity()``` function return a Vector3 discribing the average velocity in XY component and the max magnitude in the Z component (if needed for normalization)

### Install Package
This package uses the scoped registry feature to import dependent packages.
Please add the following sections to the package manifest file (Packages/manifest.json).

To the scopedRegistries section:
```
{
    "name": "Bonjour-lab",
    "url": "https://registry.npmjs.com",
    "scopes": [
    "com.bonjour-lab"
    ]
}
```

To the dependencies section:

```
"com.bonjour-lab.opticalflow": "1.0.3",
```

After changes, the manifest file should look like below:
```
{
  "scopedRegistries": [
    {
      "name": "Bonjour-lab",
      "url": "https://registry.npmjs.com",
      "scopes": [
        "com.bonjour-lab"
      ]
    }
  ],
  "dependencies": {
    "com.bonjour-lab.opticalflow": "1.0.3",
    ...
```

Tested on
-------
* Unity 2020 & 2019

Unity3D-CameraOpticalFlow

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