OpenCV For Unityグレースケール変換最小のコード

OpenCV For Unity gray

using OpenCVForUnity.CoreModule;
using OpenCVForUnity.ImgprocModule;
using OpenCVForUnity.UnityUtils;
using OpenCVForUnity.UnityUtils.Helper;
using OpenCVForUnityExample;
using UnityEngine;

[RequireComponent(typeof(WebCamTextureToMatHelper), typeof(FpsMonitor))]
public class MyFilterSample : MonoBehaviour
{
    private Texture2D texture;

    private WebCamTextureToMatHelper webCamTextureToMatHelper;

    private FpsMonitor fpsMonitor;

    private void Start()
    {
        fpsMonitor = GetComponent<FpsMonitor>();

        webCamTextureToMatHelper = gameObject.GetComponent<WebCamTextureToMatHelper>();

#if UNITY_ANDROID && !UNITY_EDITOR

            // Avoids the front camera low light issue that occurs in only some Android devices (e.g. Google Pixel, Pixel2).

            webCamTextureToMatHelper.avoidAndroidFrontCameraLowLightIssue = true;

#endif

        webCamTextureToMatHelper.Initialize();
    }

    public void OnWebCamTextureToMatHelperInitialized()
    {
        Debug.Log("OnWebCamTextureToMatHelperInitialized");

        Mat webCamTextureMat = webCamTextureToMatHelper.GetMat();

        texture = new Texture2D(webCamTextureMat.cols(), webCamTextureMat.rows(), TextureFormat.RGBA32, false);

        gameObject.GetComponent<Renderer>().material.mainTexture = texture;

        gameObject.transform.localScale = new Vector3(webCamTextureMat.cols(), webCamTextureMat.rows(), 1);

        Debug.Log("Screen.width " + Screen.width + " Screen.height " + Screen.height + " Screen.orientation " + Screen.orientation);

        if (fpsMonitor != null)
        {
            fpsMonitor.Add("width", webCamTextureMat.width().ToString());
            fpsMonitor.Add("height", webCamTextureMat.height().ToString());
            fpsMonitor.Add("orientation", Screen.orientation.ToString());
        }

        float width = webCamTextureMat.width();
        float height = webCamTextureMat.height();

        float widthScale = Screen.width / width;
        float heightScale = Screen.height / height;

        if (widthScale < heightScale)
        {
            Camera.main.orthographicSize = (width * Screen.height / Screen.width) / 2;
        }
        else
        {
            Camera.main.orthographicSize = height / 2;
        }
    }

    public void OnWebCamTextureToMatHelperDisposed()
    {
        Debug.Log("OnWebCamTextureToMatHelperDisposed");

        if (texture != null)
        {
            Texture2D.Destroy(texture);
            texture = null;
        }
    }

    public void OnWebCamTextureToMatHelperErrorOccurred(WebCamTextureToMatHelper.ErrorCode errorCode)
    {
        Debug.Log("OnWebCamTextureToMatHelperErrorOccurred " + errorCode);
    }

    private void Update()
    {
        if (webCamTextureToMatHelper.IsPlaying() && webCamTextureToMatHelper.DidUpdateThisFrame())
        {
            Mat rgbaMat = webCamTextureToMatHelper.GetMat();

            Filter(rgbaMat);

            Utils.fastMatToTexture2D(rgbaMat, texture);
        }
    }

    private void OnDestroy()
    {
        webCamTextureToMatHelper.Dispose();
    }

    private void Filter(Mat rgbaMat)
    {
        Imgproc.cvtColor(rgbaMat, rgbaMat, Imgproc.COLOR_RGBA2GRAY);

        Imgproc.cvtColor(rgbaMat, rgbaMat, Imgproc.COLOR_GRAY2RGBA);
    }
}