How Can I Optimize Bitmap Conversion in WPF for High-Speed Image Display?

Boosting WPF Image Display Speed: Optimizing Bitmap Conversions

In WPF applications demanding rapid bitmap updates, the Bitmap to BitmapSource conversion process can severely impact performance, leading to high CPU usage and jerky image display.

While CreateBitmapSourceFromHBitmap is a common solution, its computational overhead can be substantial. For significantly improved performance, consider direct memory manipulation using unsafe code.

The following code offers a faster conversion method, empirically demonstrating at least a fourfold speed increase over CreateBitmapSourceFromHBitmap. Remember to ensure the PixelFormat matches the BitmapSource:

<code class="language-csharp">public static BitmapSource Convert(System.Drawing.Bitmap bitmap)
{
    var bitmapData = bitmap.LockBits(
        new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
        System.Drawing.Imaging.ImageLockMode.ReadOnly, bitmap.PixelFormat);

    var bitmapSource = BitmapSource.Create(
        bitmapData.Width, bitmapData.Height,
        bitmap.HorizontalResolution, bitmap.VerticalResolution,
        PixelFormats.Bgr24, null,
        bitmapData.Scan0, bitmapData.Stride * bitmapData.Height, bitmapData.Stride);

    bitmap.UnlockBits(bitmapData);

    return bitmapSource;
}</code>

This optimized method dramatically reduces CPU load during bitmap conversion, resulting in smoother, faster image display in high-frequency update scenarios within your WPF application.

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