我目前正在从事一个将 OpenCVSharp 集成到 Unity 中的项目，以允许在游戏环境中进行眼动追踪。我已经设法将 OpenCVSharp 集成到 Unity 编辑器中，并且目前在游戏中可以进行眼睛检测（不是跟踪）。它可以在网络摄像头图像中找到你的眼睛，然后在我在场景中显示的纹理上显示它当前检测到它们的位置。
然而，它导致了巨大的 fps 下降，主要是因为每一帧都将网络摄像头纹理转换为 IPL 图像，以便 OpenCV 可以处理它。在完成所有眼睛检测后，它必须将其转换回 2D 纹理以显示在场景中。所以可以理解，它对 CPU 来说太多了。（据我所知，它只在我的 CPU 上使用 1 个内核）。
有没有办法在不将纹理转换为 IPL 图像的情况下进行所有的眼睛检测？或任何其他修复fps下降的方法。我尝试过的一些事情包括：
限制它更新的帧。然而，这只会使它运行平稳，然后在它必须更新的框架上可怕地结结巴巴。
查看线程，但据我所知，Unity 不允许这样做。据我所知，它只在我的 CPU 上使用 1 个内核，这似乎有点傻。如果有办法改变这一点，它可以解决问题吗？
在相机上尝试了不同的分辨率，但游戏实际可以流畅运行的分辨率太小，眼睛无法实际检测到，更不用说跟踪了。
我已经包含了下面的代码，如果您希望在代码编辑器中查看它，这里是C# File的链接。任何建议或帮助将不胜感激！
作为参考，我使用了这里的代码（使用 opencvsharp 进行眼睛检测）。
using UnityEngine;
using System.Collections;
using System;
using System.IO;
using OpenCvSharp;
//using System.Xml;
//using OpenCvSharp.Extensions;
//using System.Windows.Media;
//using System.Windows.Media.Imaging;
public class CaptureScript : MonoBehaviour
{
public GameObject planeObj;
public WebCamTexture webcamTexture; //Texture retrieved from the webcam
public Texture2D texImage; //Texture to apply to plane
public string deviceName;
private int devId = 1;
private int imWidth = 640; //camera width
private int imHeight = 360; //camera height
private string errorMsg = "No errors found!";
static IplImage matrix; //Ipl image of the converted webcam texture
CvColor[] colors = new CvColor[]
{
new CvColor(0,0,255),
new CvColor(0,128,255),
new CvColor(0,255,255),
new CvColor(0,255,0),
new CvColor(255,128,0),
new CvColor(255,255,0),
new CvColor(255,0,0),
new CvColor(255,0,255),
};
const double Scale = 1.25;
const double ScaleFactor = 2.5;
const int MinNeighbors = 2;
// Use this for initialization
void Start ()
{
//Webcam initialisation
WebCamDevice[] devices = WebCamTexture.devices;
Debug.Log ("num:" + devices.Length);
for (int i=0; i<devices.Length; i++) {
print (devices [i].name);
if (devices [i].name.CompareTo (deviceName) == 1) {
devId = i;
}
}
if (devId >= 0) {
planeObj = GameObject.Find ("Plane");
texImage = new Texture2D (imWidth, imHeight, TextureFormat.RGB24, false);
webcamTexture = new WebCamTexture (devices [devId].name, imWidth, imHeight, 30);
webcamTexture.Play ();
matrix = new IplImage (imWidth, imHeight, BitDepth.U8, 3);
}
}
void Update ()
{
if (devId >= 0)
{
//Convert webcam texture to iplimage
Texture2DtoIplImage();
/*DO IMAGE MANIPULATION HERE*/
//do eye detection on iplimage
EyeDetection();
/*END IMAGE MANIPULATION*/
if (webcamTexture.didUpdateThisFrame)
{
//convert iplimage to texture
IplImageToTexture2D();
}
}
else
{
Debug.Log ("Can't find camera!");
}
}
void EyeDetection()
{
using(IplImage smallImg = new IplImage(new CvSize(Cv.Round (imWidth/Scale), Cv.Round(imHeight/Scale)),BitDepth.U8, 1))
{
using(IplImage gray = new IplImage(matrix.Size, BitDepth.U8, 1))
{
Cv.CvtColor (matrix, gray, ColorConversion.BgrToGray);
Cv.Resize(gray, smallImg, Interpolation.Linear);
Cv.EqualizeHist(smallImg, smallImg);
}
using(CvHaarClassifierCascade cascade = CvHaarClassifierCascade.FromFile (@"C:\Users\User\Documents\opencv\sources\data\haarcascades\haarcascade_eye.xml"))
using(CvMemStorage storage = new CvMemStorage())
{
storage.Clear ();
CvSeq<CvAvgComp> eyes = Cv.HaarDetectObjects(smallImg, cascade, storage, ScaleFactor, MinNeighbors, 0, new CvSize(30, 30));
for(int i = 0; i < eyes.Total; i++)
{
CvRect r = eyes[i].Value.Rect;
CvPoint center = new CvPoint{ X = Cv.Round ((r.X + r.Width * 0.5) * Scale), Y = Cv.Round((r.Y + r.Height * 0.5) * Scale) };
int radius = Cv.Round((r.Width + r.Height) * 0.25 * Scale);
matrix.Circle (center, radius, colors[i % 8], 3, LineType.AntiAlias, 0);
}
}
}
}
void OnGUI ()
{
GUI.Label (new Rect (200, 200, 100, 90), errorMsg);
}
void IplImageToTexture2D ()
{
int jBackwards = imHeight;
for (int i = 0; i < imHeight; i++) {
for (int j = 0; j < imWidth; j++) {
float b = (float)matrix [i, j].Val0;
float g = (float)matrix [i, j].Val1;
float r = (float)matrix [i, j].Val2;
Color color = new Color (r / 255.0f, g / 255.0f, b / 255.0f);
jBackwards = imHeight - i - 1; // notice it is jBackward and i
texImage.SetPixel (j, jBackwards, color);
}
}
texImage.Apply ();
planeObj.renderer.material.mainTexture = texImage;
}
void Texture2DtoIplImage ()
{
int jBackwards = imHeight;
for (int v=0; v<imHeight; ++v) {
for (int u=0; u<imWidth; ++u) {
CvScalar col = new CvScalar ();
col.Val0 = (double)webcamTexture.GetPixel (u, v).b * 255;
col.Val1 = (double)webcamTexture.GetPixel (u, v).g * 255;
col.Val2 = (double)webcamTexture.GetPixel (u, v).r * 255;
jBackwards = imHeight - v - 1;
matrix.Set2D (jBackwards, u, col);
//matrix [jBackwards, u] = col;
}
}
}
}