我的目标:
使用 Kinect 视频做形状识别(图片上的大矩形),在图片上绘制矩形以突出显示结果。
我使用的技术:
- C#代码,
- AForge,更具体地说是它的形状检查器
http://www.aforgenet.com/articles/shape_checker/
魔法应该如何运作:
- 每次帧准备好时,我都会将帧数据作为字节数组获取并将其转换为位图以允许我对其进行分析
- 应用形状识别算法
- 渲染结果...
我的问题:
到目前为止,整个过程都有效,但是当我尝试在 WPF 图像中渲染结果时,它会严重滞后...(每 10 秒 1 帧)...
我的代码:
// AllFramesReady is called every time a frame is ready to use...
private void AllFramesReady(object sender, AllFramesReadyEventArgs e)
{
using (ColorImageFrame colorFrame = e.OpenColorImageFrame())
{
if (colorFrame == null)
{
return;
}
_Pixels = new byte[colorFrame.PixelDataLength];
colorFrame.CopyPixelDataTo(_Pixels);
// Analyze the image
int stride = colorFrame.Width * 4;
System.Drawing.Size size = new System.Drawing.Size(colorFrame.Width, colorFrame.Height);
// get the bitmap from bytes
Bitmap btmap = BytesToBmp(_Pixels, size);
//analyze the data...
btmap = _shapeReco.AnalyzeImage(btmap);
// copy the new data back to pixels
_Pixels = BmpToBytes(btmap);
// rendering the analyzed image
imageAnalyzed.Source =
BitmapSource.Create(colorFrame.Width, colorFrame.Height,
96, 96, PixelFormats.Bgr32, null, _Pixels, stride);
}
}
//
// HERE IS MY SHAPE RECOGNIZER THAT IMPLEMENTS THE SHAPE RECOGNITION ALGORITHM
//
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using AForge;
using AForge.Imaging;
using AForge.Math.Geometry;
namespace KinectSetupDev
{
class MyShapeRecognizer
{
private static String TAG = "MyShapeRecognizer";
/***************************************************************************
* VARIABLES *
***************************************************************************/
private SimpleShapeChecker _ShapeChecker;
private Bitmap _Image; // the image to analyze
private Blob[] _Blobs;
private BlobCounter _BlobCounter;
/***************************************************************************
* CONSTRUCTOR *
***************************************************************************/
public MyShapeRecognizer()
{
Debug.Log(TAG, "MyShapeRecognizer");
_ShapeChecker = new SimpleShapeChecker();
_Image = new Bitmap(300, 400);
_Blobs = null;
_BlobCounter = null;
}
/***************************************************************************
* METHODS *
***************************************************************************/
public Bitmap AnalyzeImage(Bitmap image)
{
Debug.Log(TAG, "AnalyzeImage");
this._Image = image;
this.LocatingObjects();
this.AnalyzeObjects();
return _Image;
}
private void LocatingObjects()
{
Debug.Log(TAG, "LocatingObjects");
// lock image
BitmapData bitmapData = _Image.LockBits(
new Rectangle(0, 0, _Image.Width, _Image.Height),
ImageLockMode.ReadOnly, _Image.PixelFormat);
//locating objects
_BlobCounter = new BlobCounter();
_BlobCounter.FilterBlobs = true;
_BlobCounter.MinHeight = 5;
_BlobCounter.MinWidth = 5;
_BlobCounter.ProcessImage(bitmapData);
_Blobs = _BlobCounter.GetObjectsInformation();
// unlock image
_Image.UnlockBits(bitmapData);
}
private void AnalyzeObjects()
{
Debug.Log(TAG, "AnalyzeObjects");
Graphics g = Graphics.FromImage(_Image);
[DRAW RECT OR CIRCLE ON GRAPHICS]
g.Dispose();
}
// Conver list of AForge.NET's points to array of .NET points
private System.Drawing.Point[] ToPointsArray(List<IntPoint> points)
{
System.Drawing.Point[] array = new System.Drawing.Point[points.Count];
for (int i = 0, n = points.Count; i < n; i++)
{
array[i] = new System.Drawing.Point(points[i].X, points[i].Y);
}
return array;
}
}
}
我可以提供完整的代码(MV C# 2010 项目...)。我很感激任何帮助!
谢谢。