100 lines
2.7 KiB
C#
100 lines
2.7 KiB
C#
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using FellowOakDicom.Imaging;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.Formats.Jpeg;
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using SixLabors.ImageSharp.Processing;
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using SixLabors.ImageSharp.PixelFormats;
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using IRaCIS.Core.Application.Helper;
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using SixLabors.ImageSharp.Drawing.Processing;
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public static class ImageHelper
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{
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// 采用ImageSharp组件 跨平台，不依赖windows 平台图像处理组件，这里大坑(net 6 下，之前由于Dicom处理最新组件 依赖了这个库的一个旧版本，导致缩略图bug，单独升级依赖组件才解决)
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public static void ResizeSave(string filePath, string? fileStorePath)
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{
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fileStorePath = fileStorePath ?? filePath + ".preview.jpeg";
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// 读取 DICOM 文件
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var dicomImage = new DicomImage(filePath);
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// 渲染 DICOM 图像到 ImageSharp 格式
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using (var image = dicomImage.RenderImage().AsSharpImage())
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{
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// 生成缩略图（调整大小）
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image.Mutate(x => x.Resize(500, 500));
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// 保存缩略图为 JPEG
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image.Save(fileStorePath, new JpegEncoder());
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}
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}
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public static Stream RenderPreviewJpeg(string filePath)
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{
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string jpegPath = filePath + ".preview.jpg";
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if (!File.Exists(jpegPath))
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{
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using (Stream stream = new FileStream(jpegPath, FileMode.Create))
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{
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DicomImage image = new DicomImage(filePath);
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var sharpimage = image.RenderImage().AsSharpImage();
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sharpimage.Save(stream, new JpegEncoder());
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}
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}
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return new FileStream(jpegPath, FileMode.Open);
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}
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public static void RemovePreviewJpeg(string filePath)
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{
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string jpegPath = filePath + ".preview.jpg";
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if (File.Exists(jpegPath)) File.Delete(jpegPath);
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}
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public static class ImageMaskHelper
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{
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public static async Task MaskAsync(Stream input, Stream output, IEnumerable<MaskRegion> regions)
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{
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// 确保输入流从起始位置读取
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if (input.CanSeek && input.Position != 0)
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{
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input.Position = 0;
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}
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using var image = await Image.LoadAsync(input);
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// 保存原始图片的编码格式
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var originalFormat = image.Metadata.DecodedImageFormat;
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image.Mutate(ctx =>
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{
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foreach (var r in regions)
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{
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ctx.Fill(Color.White, new Rectangle(r.X, r.Y, r.Width, r.Height));
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}
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});
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// 使用原始格式保存，保持格式不变
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await image.SaveAsync(output, originalFormat);
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}
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}
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}
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