本章主要讲述unity开发中，如何获取摄像头的图像以及保存。
调用摄像头以及保存画面
调用摄像头这个比较简单，Unity已经封装了一些接口，直接调用就好了。
（1）代码-封装摄像头画面获取以及保存
namespace Ycx_Tool.GetCamera{public class GetCamera{/// <summary>/// 摄像头图像类,继承自texture/// </summary>static WebCamTexture camTexture;/// <summary>/// 图像保存地址/// </summary>public static string Save_Path = Application.streamingAssetsPath + "/FaceDetect/FaceDetect.jpg";/// <summary>/// 获取图像/// </summary>/// <param name="image"></param>public static void GetWebCam(Image image){//如果用户允许访问，开始获取图像if (Application.HasUserAuthorization(UserAuthorization.WebCam)){//先获取设备WebCamDevice[] device = WebCamTexture.devices;string deviceName = device[0].name;//然后获取图像camTexture = new WebCamTexture(deviceName);//将获取的图像赋值image.material = new Material(Shader.Find("Unlit/Texture"));image.material.mainTexture = camTexture;//开始实时获取camTexture.Play();}}/// 图片保存有两种方法：///（1）截屏///（2）直接保存摄像头图像数据/// 本文采用第二种方法，使用webcamTexture这个类保存摄像机的图像。/// <summary>/// 保存图片/// </summary>/// <returns></returns>public static bool Save(){Texture2D t2d = new Texture2D(camTexture.width, camTexture.height, TextureFormat.ARGB32, true);//将WebCamTexture 的像素保存到texture2D中t2d.SetPixels(camTexture.GetPixels());t2d.Apply();//编码byte[] imageTytes = t2d.EncodeToJPG();//存储try{File.WriteAllBytes(Save_Path, imageTytes);return true;}catch (System.Exception){Debug.Log("请稍后再试");return false;}}}}
（2）代码-调用
结合上一章内容，在这里调用摄像头捕捉画面，进行人脸比对。
using System.Collections;using System.Collections.Generic;using UnityEngine;using Ycx_Tool.ArcFace;using Ycx_Tool.GetCamera;using UnityEngine.UI;public class Manager : MonoBehaviour{/// <summary>/// 图片/// </summary>public Image image;public Text Result;// Start is called before the first frame updatevoid Start(){//初始化人脸识别SDKSDKUtil.Init_Sdk("EEaTYku3sDaGaaNmqo8cLGc4F2eDHE42mdAbC7AS4quj", "9Ttja8dW1qZ8gqLAvhaa6MMJCqvHvqdoDQHg1DDhnHbE");//摄像头捕捉GetCamera.GetWebCam(image);}// Update is called once per framevoid Update(){if (Input.GetKeyDown(KeyCode.A)){if (GetCamera.Save()){if (float.Parse(SDKUtil.Face_Compare(GetCamera.Save_Path, Application.streamingAssetsPath + "/FaceDetect/YanChunXiang.jpg")) > 0.8f){Result.text = "签到成功";}else{Result.text = "签到失败";}}else{Result.text = "稍后再试";}}}}
