/// <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;
Bitmap grey = null;
Image image = factory.Image;
byte threshold = this.DynamicParameter;
try
{
// Detect the edges then strip out middle shades.
grey = new ConvolutionFilter(new SobelEdgeFilter(), true).Process2DFilter(image);
grey = new BinaryThreshold(threshold).ProcessFilter(grey);
// Search for the first white pixels
Rectangle rectangle = ImageMaths.GetFilteredBoundingRectangle(grey, 0);
grey.Dispose();
newImage = new Bitmap(rectangle.Width, rectangle.Height, PixelFormat.Format32bppPArgb);
newImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (Graphics graphics = Graphics.FromImage(newImage))
{
graphics.DrawImage(
image,
new Rectangle(0, 0, rectangle.Width, rectangle.Height),
rectangle.X,
rectangle.Y,
rectangle.Width,
rectangle.Height,
GraphicsUnit.Pixel);
}
// Reassign the image.
image.Dispose();
image = newImage;
if (factory.PreserveExifData && factory.ExifPropertyItems.Any())
{
// Set the width EXIF data.
factory.SetPropertyItem(ExifPropertyTag.ImageWidth, (ushort)image.Width);
// Set the height EXIF data.
factory.SetPropertyItem(ExifPropertyTag.ImageHeight, (ushort)image.Height);
}
}
catch (Exception ex)
{
grey?.Dispose();
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)
{
Bitmap newImage = null;
Bitmap grey = null;
Image image = factory.Image;
byte threshold = this.DynamicParameter;
try
{
// Detect the edges then strip out middle shades.
grey = new ConvolutionFilter(new SobelEdgeFilter(), true).Process2DFilter(image);
grey = new BinaryThreshold(threshold).ProcessFilter(grey);
// Search for the first white pixels
Rectangle rectangle = ImageMaths.GetFilteredBoundingRectangle(grey, 0);
grey.Dispose();
newImage = new Bitmap(rectangle.Width, rectangle.Height);
newImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (Graphics graphics = Graphics.FromImage(newImage))
{
graphics.DrawImage(
image,
new Rectangle(0, 0, rectangle.Width, rectangle.Height),
rectangle.X,
rectangle.Y,
rectangle.Width,
rectangle.Height,
GraphicsUnit.Pixel);
}
// Reassign the image.
image.Dispose();
image = newImage;
}
catch (Exception ex)
{
if (grey != null)
{
grey.Dispose();
}
if (newImage != null)
{
newImage.Dispose();
}
throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex);
}
return image;
}
