/// <summary> /// Processes the image. /// </summary> /// <param name="factory"> /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class containing /// the image to process. /// </param> /// <returns> /// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class. /// </returns> public Image ProcessImage(ImageFactory factory) { Bitmap newImage = null; Image image = factory.Image; try { int threshold = (int)this.DynamicParameter; newImage = new Bitmap(image); newImage = Adjustments.Brightness(newImage, threshold); image.Dispose(); image = newImage; } catch (Exception ex) { if (newImage != null) { newImage.Dispose(); } throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex); } return(image); }
/// <summary> /// Processes the image. /// </summary> /// <param name="factory"> /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class containing /// the image to process. /// </param> /// <returns> /// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class. /// </returns> public Image ProcessImage(ImageFactory factory) { Image image = factory.Image; try { int threshold = (int)this.DynamicParameter; return(Adjustments.Brightness(image, threshold)); } catch (Exception ex) { throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex); } }
/// <summary> /// Traces the edges of a given <see cref="Image"/>. /// TODO: Move this to another class. /// </summary> /// <param name="source"> /// The source <see cref="Image"/>. /// </param> /// <param name="destination"> /// The destination <see cref="Image"/>. /// </param> /// <param name="threshold"> /// The threshold (between 0 and 255). /// </param> /// <returns> /// The a new instance of <see cref="Bitmap"/> traced. /// </returns> private static Bitmap Trace(Image source, Image destination, byte threshold = 0) { int width = source.Width; int height = source.Height; // Grab the edges converting to greyscale, and invert the colors. ConvolutionFilter filter = new ConvolutionFilter(new SobelEdgeFilter(), true); using (Bitmap temp = filter.Process2DFilter(source)) { destination = new InvertMatrixFilter().TransformImage(temp, destination); // Darken it slightly to aid detection destination = Adjustments.Brightness(destination, -5); } // Loop through and replace any colors more white than the threshold // with a transparent one. using (FastBitmap destinationBitmap = new FastBitmap(destination)) { Parallel.For( 0, height, y => { for (int x = 0; x < width; x++) { // ReSharper disable AccessToDisposedClosure Color color = destinationBitmap.GetPixel(x, y); if (color.B >= threshold) { destinationBitmap.SetPixel(x, y, Color.Transparent); } // ReSharper restore AccessToDisposedClosure } }); } // Darken it again to average out the color. destination = Adjustments.Brightness(destination, -5); return((Bitmap)destination); }
/// <summary> /// Processes the image. /// </summary> /// <param name="source">The current image to process</param> /// <param name="destination">The new Image to return</param> /// <returns> /// The processed <see cref="Bitmap"/>. /// </returns> public override Bitmap TransformImage(Image source, Image destination) { using (var graphics = Graphics.FromImage(destination)) { using (var attributes = new ImageAttributes()) { attributes.SetColorMatrix(this.Matrix); var rectangle = new Rectangle(0, 0, source.Width, source.Height); graphics.DrawImage(source, rectangle, 0, 0, source.Width, source.Height, GraphicsUnit.Pixel, attributes); // Overlay the image with some semi-transparent colors to finish the effect. using (var path = new GraphicsPath()) { path.AddRectangle(rectangle); // Paint a burgundy rectangle with a transparency of ~30% over the image. // Paint a blue rectangle with a transparency of 20% over the image. using (var brush = new SolidBrush(Color.FromArgb(77, 38, 14, 28))) { Region oldClip = graphics.Clip; graphics.Clip = new Region(rectangle); graphics.FillRectangle(brush, rectangle); // Fill the blue. brush.Color = Color.FromArgb(51, 29, 32, 59); graphics.FillRectangle(brush, rectangle); graphics.Clip = oldClip; } } } } // Add brightness and contrast to finish the effect. destination = Adjustments.Brightness(destination, 5); destination = Adjustments.Contrast(destination, 85); return((Bitmap)destination); }