public void Example2()
{
var filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\shannon.webp");
// Use SkiaSharp to load a WEBP image:
var bmp = MemoryBitmap.Load(filePath, Codecs.SkiaCodec.Default);
// Use OpenCV to resize the image:
var span = bmp
.WithOpenCv()
.ToResizedMemoryBitmap(50, 50, OpenCvSharp.InterpolationFlags.Lanczos4)
.AsSpanBitmap();
// Use GDI to draw a triangle:
var a = new System.Drawing.Point(5, 5);
var b = new System.Drawing.Point(45, 45);
var c = new System.Drawing.Point(5, 45);
span
.WithGDI()
.Draw(dc => dc.DrawPolygon(System.Drawing.Pens.Red, new[] { a, b, c }));
// Use Imagesharp to save to PNG
span.AttachToCurrentTestAll("shannon.png");
}
public void CalculateImageBlurFactor(string filePath)
{
filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, filePath);
// load image using GDI
var bitmap = MemoryBitmap
.Load(filePath, Codecs.GDICodec.Default)
.AsSpanBitmap();
var blurfactor1 = Processing.SharpnessEvaluator.Evaluate(bitmap, 0.25);
// blur with openCV
bitmap.WithOpenCv().ApplyBlur((5, 5));
var blurfactor2 = Processing.SharpnessEvaluator.Evaluate(bitmap, 0.25);
// blur with openCV
bitmap.WithOpenCv().ApplyBlur((32, 32));
var blurfactor3 = Processing.SharpnessEvaluator.Evaluate(bitmap, 0.25);
TestContext.WriteLine($"{filePath} => {blurfactor1}, {blurfactor2}, {blurfactor3}");
bitmap.AttachToCurrentTestAll("final.png");
}
public void Example1()
{
var filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\shannon.webp");
// Use SkiaSharp to load a WEBP image:
var bmp = MemoryBitmap.Load(filePath, Codecs.SkiaCodec.Default);
// Use OpenCV to resize the image:
/*
* bmp = bmp
* .WithOpenCv()
* .ToResizedMemoryBitmap(50, 50, OpenCvSharp.InterpolationFlags.Lanczos4);
*/
using (var proxy = bmp.UsingOpenCv())
{
proxy.Mat.Circle(new OpenCvSharp.Point(150, 150), 35, OpenCvSharp.Scalar.Red, 10);
// proxy.Mat.Blur(new OpenCvSharp.Size(4, 4));
// OpenCvSharp.Cv2.Blur(proxy.Mat, proxy.Mat, new OpenCvSharp.Size(4, 4));
}
using (var proxy = bmp.UsingGDI())
{
// Use GDI to draw a triangle:
var a = new System.Drawing.Point(5, 5);
var b = new System.Drawing.Point(50, 50);
var c = new System.Drawing.Point(5, 50);
proxy.Canvas.DrawPolygon(System.Drawing.Pens.Red, new[] { a, b, c });
}
using (var proxy = bmp.UsingImageSharp())
{
proxy.Image.Mutate(ipc => ipc.DrawPolygon(SixLabors.ImageSharp.Color.Blue, 2, (50, 5), (50, 50), (5, 5)));
}
using (var proxy = bmp.UsingSkiaSharp())
{
var p0 = new SkiaSharp.SKPoint(5, 25);
var p1 = new SkiaSharp.SKPoint(45, 25);
using var skiaPaint = new SkiaSharp.SKPaint
{
TextSize = 64.0f,
IsAntialias = true,
StrokeWidth = 20,
Color = new SkiaSharp.SKColor(0, 255, 0),
Style = SkiaSharp.SKPaintStyle.Fill
};
proxy.Canvas.DrawLine(p0, p1, skiaPaint);
proxy.Canvas.DrawText("SkiaSharp", new SkiaSharp.SKPoint(5, 200), skiaPaint);
}
// Use Imagesharp to save to PNG
bmp.Save(AttachmentInfo.From("shannon.png"));
}
public void DrawMemoryAsImageSharp()
{
var mem = MemoryBitmap.Load(ResourceInfo.From("shannon.jpg"), Codecs.GDICodec.Default);
mem.OfType <Pixel.BGRA32>()
.AsSpanBitmap()
.ReadAsImageSharp(img => { AttachmentInfo.From("result.png").WriteImage(img); return(0); });
}
public void LoadImage(string filePath)
{
filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, filePath);
var membmp = MemoryBitmap.Load(filePath, Codecs.OpenCvCodec.Default);
membmp.Save(AttachmentInfo.From("Result.png"));
}
public void TestTransform(bool useBilinear)
{
var src = LoadShannonImage().OfType <Pixel.BGR24>();
src.Save(new AttachmentInfo("input.png"));
var filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\cat.png");
var cat00 = MemoryBitmap
.Load(filePath, Codecs.GDICodec.Default)
.OfType <Pixel.BGRA32>();
filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\QRCode.png");
var qrcode = MemoryBitmap
.Load(filePath, Codecs.GDICodec.Default)
.OfType <Pixel.BGRA32>();
var x = Matrix3x2.CreateScale(0.75f, 0.75f) * Matrix3x2.CreateRotation(0.25f);
x.Translation = new Vector2(20, 20);
Matrix3x2.Invert(x, out var xx);
var dst = new MemoryBitmap <Pixel.BGR24>(512, 512);
using (PerformanceBenchmark.Run(t => TestContext.WriteLine($"Transform {(int)t.TotalMilliseconds}ms")))
{
dst.AsSpanBitmap().SetPixels(xx, src.AsSpanBitmap(), useBilinear);
}
for (float r = 0.1f; r < 1; r += 0.2f)
{
// 1st API
var xform = Matrix3x2.CreateRotation(r) * Matrix3x2.CreateTranslation(50, 15);
xform = Matrix3x2.CreateTranslation(-50, -50) * xform * Matrix3x2.CreateTranslation(50, 50);
xform = xform * Matrix3x2.CreateScale(3, 3);
dst.AsSpanBitmap().SetPixels(xform, cat00.AsSpanBitmap(), useBilinear, r);
DrawBounds(dst, cat00.Bounds, xform, Colors.Red);
// 2nd API
xform *= Matrix3x2.CreateTranslation(0, 150);
dst.AsSpanBitmap().SetPixels(xform, cat00.AsSpanBitmap(), useBilinear, r);
DrawBounds(dst, cat00.Bounds, xform, Colors.Red);
}
dst.AsSpanBitmap().SetPixels(Matrix3x2.CreateScale(3), cat00.AsSpanBitmap(), useBilinear);
dst.AsSpanBitmap().SetPixels(Matrix3x2.CreateScale(-.6f) * Matrix3x2.CreateTranslation(40, 200), cat00.AsSpanBitmap(), useBilinear);
dst.AsSpanBitmap().SetPixels(Matrix3x2.CreateScale(.3f) * Matrix3x2.CreateRotation(1) * Matrix3x2.CreateTranslation(150, 300), qrcode.AsSpanBitmap(), useBilinear);
dst.Save(new AttachmentInfo("transformed.png"));
}
public void LoadKinect2ColorFrame()
{
TestContext.CurrentContext.AttachFolderBrowserShortcut();
var src = MemoryBitmap <ushort> .Load(ResourceInfo.From("Kinect2Color.InteropBmp"));
var dst = new MemoryBitmap <Pixel.BGR24>(src.Width, src.Height);
dst.AsSpanBitmap().SetPixelsFromYUY2(src);
dst.Save(AttachmentInfo.From("kinect2color.jpg"));
}
private static MemoryBitmap LoadShannonImage()
{
var filePath = System.IO.Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources\\shannon.jpg");
// load a bitmap with SkiaSharp, which is known to support WEBP.
var mem = MemoryBitmap.Load(filePath, Codecs.GDICodec.Default);
var mem2 = new MemoryBitmap(mem.Width, mem.Height, Pixel.BGR24.Format);
mem2.SetPixels(0, 0, mem);
return(mem2);
}