c# – 如何将图像文件绘制/叠加到位图图像?

我有一个Kinect传感器的视频输入,该传感器由存储为位图的图像托管.我的问题是如何将图像叠加到视频源上,例如.png.

视频输入显示如下图所示为位图源,我知道如何在位图上绘制一条线但是如何从资源中绘制图像呢?

KinectVideo.Source = BitmapSource.Create(colorFrame.Width, colorFrame.Height, 96, 96,
                    PixelFormats.Bgr32, null, colorData, colorFrame.Width * colorFrame.BytesPerPixel); 

下面是通过将图像放在视频源上来模拟我想要实现的目标:

更新了绘图方法的实现,我不认为这是正确的实现我在将图像路径添加到.DrawImage时得到无效的参数错误:

void myKinect_ColorFrameReady(object sender, ColorImageFrameReadyEventArgs e)
        {
            using (ColorImageFrame colorFrame = e.OpenColorImageFrame())
            {

                if (colorFrame == null) return;
                byte[] colorData = new byte[colorFrame.PixelDataLength];
                colorFrame.CopyPixelDataTo(colorData);

                 KinectVideo.Source = BitmapSource.Create(colorFrame.Width, colorFrame.Height, 96, 96,
                    PixelFormats.Bgr32, null, colorData, colorFrame.Width * colorFrame.BytesPerPixel);

                Rect destRect2;

               //drawing image overlay to video feed
                 var drawingVisual = new DrawingVisual();
                 var drawingContext = drawingVisual.RenderOpen();
                 drawingContext.DrawImage(BitmapSource.Create(colorFrame.Width, colorFrame.Height, 96, 96, PixelFormats.Bgr32, null, colorData, colorFrame.Width * colorFrame.BytesPerPixel),
                                           new Rect(new Size(colorFrame.Width, colorFrame.Height)));
                 drawingContext.DrawImage("Images/boxbag.jpg", destRect2);
                 drawingContext.Close();
                 var mergedImage = new RenderTargetBitmap(colorFrame.Width, colorFrame.Height, 96, 96, PixelFormats.Pbgra32);
                 mergedImage.Render(drawingVisual);

                 KinectVideo.Source = mergedImage; 


            }
        }
最佳答案
要创建合并图像,您可以使用DrawingContext为您提供DrawText或DrawImage等方法,然后使用RenderTargetBitmap.Render渲染它:

var drawingVisual = new DrawingVisual();
var drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawImage(BitmapSource.Create(colorFrame.Width, colorFrame.Height, 96, 96, PixelFormats.Bgr32, null, colorData, colorFrame.Width * colorFrame.BytesPerPixel), 
                          new Rect(new Size(colorFrame.Width, colorFrame.Height)));
var overlayImage = new BitmapImage(new Uri("Images/boxbag.jpg"));
drawingContext.DrawImage(overlayImage, 
                          new Rect(x, y, overlayImage.Width, overlayImage.Height));
drawingContext.Close();
var mergedImage = new RenderTargetBitmap(colorFrame.Width, colorFrame.Height, 96, 96, PixelFormats.Pbgra32);
mergedImage.Render(drawingVisual);

KinectVideo.Source = mergedImage;

转载注明原文:c# – 如何将图像文件绘制/叠加到位图图像? - 代码日志