public void WarpAffineTransform()
{
var filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\shannon.jpg");
var src = MemoryBitmap.Load(filePath, Codecs.OpenCvCodec.Default);
var dst = new MemoryBitmap(512, 512, src.Info.PixelFormat);
var xform = System.Numerics.Matrix3x2.CreateScale(1.3f, 1.3f) * System.Numerics.Matrix3x2.CreateRotation(0.25f);
xform.Translation = new System.Numerics.Vector2(5, 40);
using (PerformanceBenchmark.Run(t => TestContext.WriteLine($"OpenCV {t}")))
{
using var bm = PerformanceBenchmark.Run(result => TestContext.WriteLine(result.TotalMilliseconds));
OpenCvSharp4Toolkit.WarpAffine(src, dst, xform);
}
dst.Save(new AttachmentInfo("result.opencv.jpg"));
dst.AsSpanBitmap().WritableBytes.Fill(0);
using (PerformanceBenchmark.Run(t => TestContext.WriteLine($"Soft {t}")))
{
using var bm = PerformanceBenchmark.Run(result => TestContext.WriteLine(result.TotalMilliseconds));
dst.AsSpanBitmap().SetPixels(xform, src);
}
dst.Save(new AttachmentInfo("result.soft.jpg"));
}
public async Task CreateBitmap()
{
using var bmp = new BitmapInfo(256, 256, Pixel.RGBA32.Format)
.ToAndroidFactory()
.CreateCompatibleBitmap();
MemoryBitmap <Pixel.RGBA32> dst = default;
bmp.CopyTo(ref dst);
dst.AsSpanBitmap().AsTypeless().SetPixels(System.Drawing.Color.Red);
dst.AsSpanBitmap().AsTypeless().Slice(new BitmapBounds(5, 5, 255 - 10, 255 - 10)).SetPixels(new Random());
dst.AsSpanBitmap().AsTypeless().CopyTo(bmp);
TestContext.WriteLine($"{dst.Width} {dst.Height}");
await TestContext.CurrentContext.AttachToCurrentTest("test1.png", bmp);
}
private static void _DrawTransformedBitmapWithMulAdd <TPixel>(float mul, float add)
where TPixel : unmanaged
{
var src = MemoryBitmap <Pixel.BGR24> .Load(ResourceInfo.From("shannon.jpg"));
var dst = new MemoryBitmap <TPixel>(256, 256);
var xform = System.Numerics.Matrix3x2.CreateScale(dst.Width / (float)src.Width, dst.Height / (float)src.Height);
dst.AsSpanBitmap().SetPixels <Pixel.BGR24>(xform, src, true, (mul, add));
dst.Save(AttachmentInfo.From($"result-{typeof(TPixel).Name}.jpg"));
}
public static void Inference <TResult>(this IInferenceContext <PointerBitmap, TResult> context, TResult result, SpanBitmap image, RECT?imageRect = null)
where TResult : class
{
if (image.PixelFormat == Pixel.BGR24.Format)
{
context.Inference(result, image.OfType <Pixel.BGR24>(), imageRect);
return;
}
// convert image to BGR24
MemoryBitmap tmp = default;
image.CopyTo(ref tmp, Pixel.BGR24.Format);
tmp.AsSpanBitmap().PinReadablePointer
(
ptrBmp => context.Inference(result, ptrBmp, imageRect)
);
}
private bool _TryGetImageSource(ImageSource src, out SpanBitmap bitmap)
{
if (src.Source is SpanBitmap.ISource typeless)
{
bitmap = typeless.AsSpanBitmap().AsReadOnly(); if (bitmap.IsEmpty)
{
return(false);
}
src.WithSourceSize(bitmap.Width, bitmap.Height);
return(true);
}
if (src.Source is MemoryBitmap.IDisposableSource isrc)
{
bitmap = isrc.AsMemoryBitmap().AsSpanBitmap().AsReadOnly(); if (bitmap.IsEmpty)
{
return(false);
}
src.WithSourceSize(bitmap.Width, bitmap.Height);
return(true);
}
if (src.Source is InterlockedBitmap ilock)
{
ilock.DequeueLastOrDefault(innerBmp => innerBmp.AsSpanBitmap().CopyTo(ref _TempBitmap));
if (_TempBitmap.IsEmpty)
{
bitmap = default; return(false);
}
bitmap = _TempBitmap.AsSpanBitmap().AsReadOnly();
src.WithSourceSize(bitmap.Width, bitmap.Height);
return(true);
}
bitmap = default;
return(false);
}
protected override SpanBitmap <TPixel> GetRenderTarget() => _Target.AsSpanBitmap();
public static Adapters.OpenCvSharp4SpanAdapter WithOpenCv <TPixel>(this MemoryBitmap <TPixel> bmp)
where TPixel : unmanaged
{
return(new Adapters.OpenCvSharp4SpanAdapter(bmp.AsSpanBitmap()));
}