/// <summary> /// Converting raw pixel data to jpeg stream /// </summary> /// <param name="rawPixel">The raw pixel data</param> /// <param name="width">The width of the image</param> /// <param name="height">The height of the image</param> /// <param name="channels">The number of channels</param> /// <returns>The jpeg stream</returns> public static JpegData PixelToJpeg(byte[] rawPixel, int width, int height, int channels) { if (channels != 4) { throw new NotImplementedException("Only 4 channel pixel input is supported."); } System.Drawing.Size sz = new System.Drawing.Size(width, height); using (CGColorSpace cspace = CGColorSpace.CreateDeviceRGB()) using (CGBitmapContext context = new CGBitmapContext( rawPixel, sz.Width, sz.Height, 8, sz.Width * 4, cspace, CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrder32Big)) using (CGImage cgImage = context.ToImage()) using (NSBitmapImageRep newImg = new NSBitmapImageRep(cgImage)) { JpegData result = new JpegData(); var rawJpegData = newImg.RepresentationUsingTypeProperties(NSBitmapImageFileType.Jpeg); byte[] raw = new byte[rawJpegData.Length]; System.Runtime.InteropServices.Marshal.Copy(rawJpegData.Bytes, raw, 0, (int)rawJpegData.Length); result.Raw = raw; result.Width = sz.Width; result.Height = sz.Height; return(result); } }
/// <summary> /// Read the file and draw rectangles on it. /// </summary> /// <param name="fileName">The name of the file.</param> /// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and labels</param> /// <returns>The image in Jpeg stream format</returns> public static JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null) { NSImage img; if (File.Exists(fileName)) { img = new NSImage(fileName); //full path } else { img = NSImage.ImageNamed(fileName); //image included in the package } if (annotations != null && annotations.Length > 0) { DrawAnnotations(img, annotations); } var imageData = img.AsTiff(); var imageRep = NSBitmapImageRep.ImageRepsWithData(imageData)[0] as NSBitmapImageRep; var jpegData = imageRep.RepresentationUsingTypeProperties(NSBitmapImageFileType.Jpeg, null); byte[] jpeg = new byte[jpegData.Length]; System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length); JpegData result = new JpegData(); result.Raw = jpeg; result.Width = (int)img.Size.Width; result.Height = (int)img.Size.Height; return(result); }
/// <summary> /// Convert bitmap to jpeg /// </summary> /// <param name="bmp">The android bitmap</param> /// <returns>The jpeg representation</returns> public static Emgu.Models.JpegData ToJpeg(this Android.Graphics.Bitmap bmp) { using (MemoryStream ms = new MemoryStream()) { bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms); JpegData result = new JpegData(); result.Raw = ms.ToArray(); result.Width = bmp.Width; result.Height = bmp.Height; return(result); } }
/// <summary> /// Read the file and draw rectangles on it. /// </summary> /// <param name="fileName">The name of the file.</param> /// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and labels</param> /// <returns>The image in Jpeg stream format</returns> public static JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null) { UIImage uiimage = new UIImage(fileName); UIImage imgWithRect = DrawAnnotations(uiimage, annotations); var jpegData = imgWithRect.AsJPEG(); byte[] jpeg = new byte[jpegData.Length]; System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length); JpegData result = new JpegData(); result.Raw = jpeg; result.Width = (int)uiimage.Size.Width; result.Height = (int)uiimage.Size.Height; return(result); }
/// <summary> /// Read the file and draw rectangles on it. /// </summary> /// <param name="fileName">The name of the file.</param> /// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and labels</param> /// <returns>The image in Jpeg stream format</returns> public static Emgu.Models.JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null) { using (BitmapFactory.Options options = new BitmapFactory.Options()) { options.InMutable = true; using (Android.Graphics.Bitmap bmp = BitmapFactory.DecodeFile(fileName, options)) { if (annotations != null) { using (Android.Graphics.Paint p = new Android.Graphics.Paint()) using (Canvas c = new Canvas(bmp)) { p.AntiAlias = true; p.Color = Android.Graphics.Color.Red; p.TextSize = 20; for (int i = 0; i < annotations.Length; i++) { p.SetStyle(Paint.Style.Stroke); float[] rects = ScaleLocation(annotations[i].Rectangle, bmp.Width, bmp.Height); Android.Graphics.Rect r = new Rect((int)rects[0], (int)rects[1], (int)rects[2], (int)rects[3]); c.DrawRect(r, p); p.SetStyle(Paint.Style.Fill); c.DrawText(annotations[i].Label, (int)rects[0], (int)rects[1], p); } } } using (MemoryStream ms = new MemoryStream()) { bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms); JpegData result = new JpegData(); result.Raw = ms.ToArray(); result.Width = bmp.Width; result.Height = bmp.Height; return(result); } } } }
/// <summary> /// Read the file and draw rectangles on it. /// </summary> /// <param name="fileName">The name of the file.</param> /// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and labels</param> /// <returns>The image in Jpeg stream format</returns> public static JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null) { Bitmap img = new Bitmap(fileName); if (annotations != null) { using (Graphics g = Graphics.FromImage(img)) { for (int i = 0; i < annotations.Length; i++) { if (annotations[i].Rectangle != null) { float[] rects = ScaleLocation(annotations[i].Rectangle, img.Width, img.Height); PointF origin = new PointF(rects[0], rects[1]); RectangleF rect = new RectangleF(origin, new SizeF(rects[2] - rects[0], rects[3] - rects[1])); Pen redPen = new Pen(Color.Red, 3); g.DrawRectangle(redPen, Rectangle.Round(rect)); String label = annotations[i].Label; if (label != null) { g.DrawString(label, new Font(FontFamily.GenericSansSerif, 20f), Brushes.Red, origin); } } } g.Save(); } } using (MemoryStream ms = new MemoryStream()) { img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); JpegData result = new JpegData(); result.Raw = ms.ToArray(); result.Width = img.Size.Width; result.Height = img.Size.Height; return(result); } }
/// <summary> /// Read the file and draw rectangles on it. /// </summary> /// <param name="fileName">The name of the file.</param> /// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and lables</param> /// <returns>The image in Jpeg stream format</returns> public static JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null) { #if __ANDROID__ BitmapFactory.Options options = new BitmapFactory.Options(); options.InMutable = true; Android.Graphics.Bitmap bmp = BitmapFactory.DecodeFile(fileName, options); Android.Graphics.Paint p = new Android.Graphics.Paint(); p.SetStyle(Paint.Style.Stroke); p.AntiAlias = true; p.Color = Android.Graphics.Color.Red; Canvas c = new Canvas(bmp); for (int i = 0; i < annotations.Length; i++) { float[] rects = ScaleLocation(annotations[i].Rectangle, bmp.Width, bmp.Height); Android.Graphics.Rect r = new Rect((int)rects[0], (int)rects[1], (int)rects[2], (int)rects[3]); c.DrawRect(r, p); } using (MemoryStream ms = new MemoryStream()) { bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms); JpegData result = new JpegData(); result.Raw = ms.ToArray(); result.Width = bmp.Width; result.Height = bmp.Height; return(result); } #elif __MACOS__ NSImage img = NSImage.ImageNamed(fileName); if (annotations != null && annotations.Length > 0) { DrawAnnotations(img, annotations); } var imageData = img.AsTiff(); var imageRep = NSBitmapImageRep.ImageRepsWithData(imageData)[0] as NSBitmapImageRep; var jpegData = imageRep.RepresentationUsingTypeProperties(NSBitmapImageFileType.Jpeg, null); byte[] jpeg = new byte[jpegData.Length]; System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length); JpegData result = new JpegData(); result.Raw = jpeg; result.Width = (int)img.Size.Width; result.Height = (int)img.Size.Height; return(result); #elif __IOS__ UIImage uiimage = new UIImage(fileName); UIGraphics.BeginImageContextWithOptions(uiimage.Size, false, 0); var context = UIGraphics.GetCurrentContext(); uiimage.Draw(new CGPoint()); context.SetStrokeColor(UIColor.Red.CGColor); context.SetLineWidth(2); for (int i = 0; i < annotations.Length; i++) { float[] rects = ScaleLocation( annotations[i].Rectangle, (int)uiimage.Size.Width, (int)uiimage.Size.Height); CGRect cgRect = new CGRect( (nfloat)rects[0], (nfloat)rects[1], (nfloat)(rects[2] - rects[0]), (nfloat)(rects[3] - rects[1])); context.AddRect(cgRect); context.DrawPath(CGPathDrawingMode.Stroke); } context.ScaleCTM(1, -1); context.TranslateCTM(0, -uiimage.Size.Height); for (int i = 0; i < annotations.Length; i++) { float[] rects = ScaleLocation( annotations[i].Rectangle, (int)uiimage.Size.Width, (int)uiimage.Size.Height); context.SelectFont("Helvetica", 18, CGTextEncoding.MacRoman); context.SetFillColor((nfloat)1.0, (nfloat)0.0, (nfloat)0.0, (nfloat)1.0); context.SetTextDrawingMode(CGTextDrawingMode.Fill); context.ShowTextAtPoint(rects[0], uiimage.Size.Height - rects[1], annotations[i].Label); } UIImage imgWithRect = UIGraphics.GetImageFromCurrentImageContext(); UIGraphics.EndImageContext(); var jpegData = imgWithRect.AsJPEG(); byte[] jpeg = new byte[jpegData.Length]; System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length); JpegData result = new JpegData(); result.Raw = jpeg; result.Width = (int)uiimage.Size.Width; result.Height = (int)uiimage.Size.Height; return(result); #else Bitmap img = new Bitmap(fileName); if (annotations != null) { using (Graphics g = Graphics.FromImage(img)) { for (int i = 0; i < annotations.Length; i++) { if (annotations[i].Rectangle != null) { float[] rects = ScaleLocation(annotations[i].Rectangle, img.Width, img.Height); PointF origin = new PointF(rects[0], rects[1]); RectangleF rect = new RectangleF(origin, new SizeF(rects[2] - rects[0], rects[3] - rects[1])); Pen redPen = new Pen(Color.Red, 3); g.DrawRectangle(redPen, Rectangle.Round(rect)); String label = annotations[i].Label; if (label != null) { g.DrawString(label, new Font(FontFamily.GenericSansSerif, 20f), Brushes.Red, origin); } } } g.Save(); } } using (MemoryStream ms = new MemoryStream()) { img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); JpegData result = new JpegData(); result.Raw = ms.ToArray(); result.Width = img.Size.Width; result.Height = img.Size.Height; return(result); } #endif }