如何将效果应用到所选择的图像区域

using Aspose.Imaging;
Aspose.Imaging.Rectangle blurRegion = new Aspose.Imaging.Rectangle(100, 80, 80, 80); // (x, y, width, height)

using Aspose.Imaging.Filters;
string inputPath = @"./photo.jpg";
string outputPath = @"./photo_blur_face.png";

using (Image image = Image.Load(inputPath))
{
    var rect = new Aspose.Imaging.Rectangle(100, 80, 80, 80); // Only this area is affected
    image.Filter(rect, new GaussWienerFilterOptions(9, 9)); // Blur filter
    image.Save(outputPath, new Aspose.Imaging.ImageOptions.PngOptions());
}

var highlightRect = new Aspose.Imaging.Rectangle(200, 150, 60, 60);
image.Filter(highlightRect, new SharpenFilterOptions(7));

string[] files = Directory.GetFiles("./batch", "*.jpg");
foreach (var file in files)
{
    using (Image img = Image.Load(file))
    {
        img.Filter(new Aspose.Imaging.Rectangle(50, 40, 100, 100), new GaussWienerFilterOptions(7, 7));
        img.Save(Path.ChangeExtension(file, ".blurred.png"), new Aspose.Imaging.ImageOptions.PngOptions());
    }
}