難しくスキャンされたドキュメントのDeskwの正確性を向上させる方法

using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;

string inputPath = "./input/difficult_scan.jpg";
string outputWhite = "./output/deskewed_white.jpg";
string outputGray = "./output/deskewed_gray.jpg";
string outputTransparent = "./output/deskewed_transparent.png";

using (var image = (RasterImage)Image.Load(inputPath))
{
    // Try with white background
    image.NormalizeAngle(false, Color.White);
    image.Save(outputWhite, new JpegOptions { Quality = 90 });
}
using (var image = (RasterImage)Image.Load(inputPath))
{
    // Try with light gray background
    image.NormalizeAngle(false, Color.LightGray);
    image.Save(outputGray, new JpegOptions { Quality = 90 });
}
using (var image = (RasterImage)Image.Load(inputPath))
{
    // Try with transparency (PNG only)
    image.NormalizeAngle(false, Color.Transparent);
    image.Save(outputTransparent, new PngOptions());
}

using (var image = (RasterImage)Image.Load(inputPath))
{
    image.NormalizeAngle(true, Color.White); // true = expand canvas to fit
    image.Save("./output/deskewed_expanded.jpg", new JpegOptions { Quality = 90 });
}