Unity之读取本地图片

1.下载Opencv for unity.

2.把OpenCVForUnity下的StreamingAssets拖到Assets下。

3.点击Tools->opencv for unity->set plugin import settings.

using UnityEngine;
using System.Collections;
using OpenCVForUnity;
using System;
using System.Collections.Generic;

public class imageTest : MonoBehaviour {
    public Texture2D img;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
        if (Input.GetKeyDown(KeyCode.A)){
            int height = 500;
            string imgpath = "/Users/shiyuhuang/Downloads/ATOCAR/ATOCAR_UNITY_2/ATOCAR_UNITY/13.jpg";
            Mat imgMat2 = Imgcodecs.imread(imgpath);
            Mat imgMat = new Mat ();
            int new_w, new_h=500;
            double scale  = new_h/Convert.ToDouble(imgMat2.rows ());
            new_w = Convert.ToInt32 (imgMat2.cols () * scale);

            Imgproc.resize (imgMat2, imgMat,new Size( Convert.ToDouble(new_w), Convert.ToDouble(new_h)) );
            List<Mat> channels = new List<Mat>();
            OpenCVForUnity.Core.split (imgMat,channels);
            Mat a = new Mat ();
            a = channels [0];
            channels [0] = channels [2];
            channels [2] = a;
            OpenCVForUnity.Core.merge (channels,imgMat);

            Debug.Log("您按下了A键"+imgMat.size());
            SpriteRenderer spr = gameObject.GetComponent<SpriteRenderer>();

            Texture2D texture2d = new Texture2D (new_w, new_h);
            Utils.matToTexture2D (imgMat, texture2d);
            Sprite sp = Sprite.Create(texture2d,new UnityEngine.Rect(0, 0, new_w, new_h), new Vector2(0.5f,0.5f) );//注意居中显示采用0.5f值
            spr.sprite = sp;

//            gameObject.GetComponent<Renderer> ().material.mainTexture = texture2d;

//            Mat imgMat2 = new Mat (texture2d.height, texture2d.width, CvType.CV_8UC4);

//            Utils.texture2DToMat (texture2d, imgMat2);
//            Imgcodecs.imwrite ("/Users/shiyuhuang/Downloads/ATOCAR/ATOCAR_UNITY_2/ATOCAR_UNITY/test2.jpg",imgMat2);
        }
    }
}