/// <summary>
/// Returns a trimmed image according to the given parameters if Trimming is true, the original image otherwise.
/// </summary>
/// <param name="originalImage">The image that need to be trimmed.</param>
/// <param name="trimming">Does the image need to be trimmed.</param>
/// <param name="isGrayed">Is the image grayed ?</param>
/// <param name="trimmingValue">Between 0 and 255, the closer to 0, the more will be trimmed.</param>
/// <param name="trimmingMethod">The trimming method to be used.</param>
/// <returns>A trimmed image according to the given parameters if Trimming is true, the original image otherwise.</returns>
private Bitmap TrimImage(Bitmap originalImage, bool trimming, bool isGrayed, int trimmingValue, TrimmingMethod trimmingMethod)
{
if (trimming)
{
using (Bitmap grayedImage = GrayImage(originalImage, !isGrayed))
{
int startX = -2;
int startY = -2;
int endX = -2;
int endY = -2;
switch (trimmingMethod)
{
case TrimmingMethod.Absolute:
AbsoluteTrimming(grayedImage, trimmingValue, ref startX, ref startY, ref endX, ref endY);
break;
case TrimmingMethod.Average:
AverageTrimming(grayedImage, trimmingValue, ref startX, ref startY, ref endX, ref endY);
break;
}
if (startX < 0)
{
startX = 0;
}
if (startY < 0)
{
startY = 0;
}
if (endX < 0)
{
endX = 0;
}
if (endY < 0)
{
endY = 0;
}
if (startX > endX)
{
startX = endX;
}
if (startY > endY)
{
startY = endY;
}
return(originalImage.Clone(new RectangleF(startX, startY, endX - startX, endY - startY), originalImage.PixelFormat));
}
}
else
{
return(originalImage);
}
}
/// <summary>
/// Perform the full treatment on an image, that is graying, trimming and resizing, and returns the result.
/// </summary>
/// <param name="originalImage">The image that need to be treated.</param>
/// <param name="height">The height of the treated image.</param>
/// <param name="grayscale">Does the image need to be grayed.</param>
/// <param name="trimming">Does the image need to be trimmed.</param>
/// <param name="trimmingValue">Between 0 and 255, the closer to 0, the more will be trimmed.</param>
/// <param name="leftMargin">Between 0 and 1, the width of the left margin, 0.5 in order to have the left and right margin equals.</param>
/// <param name="trimmingMethod">The trimming method to be used.</param>
/// <returns>An image grayed, trimmed and resized according to the given parameters.</returns>
public Bitmap TreatImage(Bitmap originalImage, int height, bool grayscale, bool trimming, int trimmingValue, double leftMargin, TrimmingMethod trimmingMethod)
{
int theoreticalWidth = (Int32)Math.Round((double)(height * 0.75), 0, MidpointRounding.AwayFromZero);
Bitmap treatedImage = new Bitmap(theoreticalWidth, height);
using (Bitmap grayedImage = GrayImage(originalImage, grayscale))
{
using (Bitmap trimmedImage = TrimImage(grayedImage, trimming, grayscale, trimmingValue, trimmingMethod))
{
using (Graphics g = Graphics.FromImage((System.Drawing.Image)treatedImage))
{
int width = (Int32)Math.Round((double)(height * trimmedImage.Width / trimmedImage.Height), 0, MidpointRounding.AwayFromZero);
g.FillRectangle(new SolidBrush(Color.White), 0, 0, theoreticalWidth, height);
g.DrawImage(trimmedImage, (float)((theoreticalWidth - width) * leftMargin), 0, width, height);
}
}
}
return(treatedImage);
}
