Question

我有一个uEye相机，我以1000毫秒的间隔拍摄图像的快照，我想在WPF Image控件中渲染它们

 Bitmap MyBitmap;

// get geometry of uEye image buffer

int width = 0, height = 0, bitspp = 0, pitch = 0, bytespp = 0;

long imagesize = 0;

m_uEye.InquireImageMem(m_pCurMem, GetImageID(m_pCurMem), ref width, ref height, ref bitspp, ref pitch);

bytespp = (bitspp + 1) / 8;

imagesize = width * height * bytespp; // image size in bytes

// bulit a system bitmap
MyBitmap = new Bitmap(width, height, PixelFormat.Format24bppRgb);

// fill the system bitmap with the image data from the uEye SDK buffer
BitmapData bd = MyBitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
m_uEye.CopyImageMem(m_pCurMem, GetImageID(m_pCurMem), bd.Scan0);
MyBitmap.UnlockBits(bd);

我试图将这些位图以1秒的速率放入Image控件中。我如何让Bitmap出现在Image控件中并在我完成后立即处理它们以留下最小的内存占用成为一个优秀的小程序员:)？

Answer 1

这就是我们的方式（对我而言，它在不加载CPU的情况下以200fps工作（约5％））：

    private WriteableBitmap PrepareForRendering(VideoBuffer videoBuffer) {
        PixelFormat pixelFormat;
        if (videoBuffer.pixelFormat == PixFrmt.rgb24) {
            pixelFormat = PixelFormats.Rgb24;
        } else if (videoBuffer.pixelFormat == PixFrmt.bgra32) {
            pixelFormat = PixelFormats.Bgra32;
        } else if (videoBuffer.pixelFormat == PixFrmt.bgr24) {
            pixelFormat = PixelFormats.Bgr24;
        } else {
            throw new Exception("unsupported pixel format");
        }
        var bitmap = new WriteableBitmap(
            videoBuffer.width, videoBuffer.height,
            96, 96,
            pixelFormat, null
        );
        _imgVIew.Source = bitmap;
        return bitmap;
    }

    private void DrawFrame(WriteableBitmap bitmap, VideoBuffer videoBuffer, double averangeFps) {
        VerifyAccess();
        if (isPaused) {
            return;
        }

        bitmap.Lock();
        try {
            using (var ptr = videoBuffer.Lock()) {
                bitmap.WritePixels(
                    new Int32Rect(0, 0, videoBuffer.width, videoBuffer.height),
                    ptr.value, videoBuffer.size, videoBuffer.stride,
                    0, 0
                );
            }
        } finally {
            bitmap.Unlock();
        }
        fpsCaption.Text = averangeFps.ToString("F1");
    }

将相机图像渲染到WPF图像控件

1 个答案: