The C# project associated with the Unity project contains four files:

1. Detector.cs

interface Detector with two provided methods, void Start(), a standard Unity method, IEnumerator Detect (Color32[] picture, int requestedWidth, SystemAction<IList> callback), which detects the objects from aa picture represented as an array of Color32.

class BoundingBoxDimensions with size and coordinates properties

class BoundingBox with the following properties: BoundingBoxDimensions Dimensions, string Label, float Confidence, Rect Rect

The reason of this file existence is that in future other kind of detector can be explored.

2. GraphicsWorker.cs

Provides an only one static method IWorker GetWorker (Model model), which returns an instance of IWorker depending on a current platform and GPU availability

3. PhoneCamera.cs

Contains class PhoneCamera: MonoBehaviour which gets all needed inputs from Unity, including box colors, background, detector, a prefab for box, a text field for FPS, and provides the following methods: void Start(), in which the texture from a camera is got and ratio for detecting frame is set, void Update(), where the input from camera is provided to the Detector, and the detection starts on each frame. Also, bounding boxes are redrawn here, and FPS is counted

4. Yolov5Detector.cs

Contains class Yolov5Detector: MonoBehaviour, Detector, in which the detector’s parameters are handled, such as image size, number of classes, number of the model’s output rows, minimal confidence rate, limit of detectable objects, neural network model file and labels file.

It provides the following methods: void Start (), in which labels, a model and a worker are loaded, IEnumerator Detect (Color32[] picture, int requestedWidth, SystemAction<IList> callback), as described in the base Detect class