/// <summary>
/// Remove lines or borders using Leptonica library.
/// </summary>
/// <param name="image"></param>
/// <returns></returns>
public static Bitmap RemoveLines(Bitmap image)
{
using (Pix pix = PixConverter.ToPix(image))
{
// remove horizontal lines
using (Pix result = pix.RemoveLines())
{
// rotate 90 degrees CW
using (Pix result1 = result.Rotate90(1))
{
// effectively remove vertical lines
using (Pix result2 = result1.RemoveLines())
{
// rotate 90 degrees CCW
using (Pix result3 = result2.Rotate90(-1))
{
return(PixConverter.ToBitmap(result3));
}
}
}
}
}
}
public override Pix Handle(Pix request)
{
request = request?.RemoveLines();
return(base.Handle(request));
}
