C# .NET 将 JPEG 图像转换为位图结构
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C# .NET Convert a JPEG Image into a Bitmap structure
提问by asdrubael
I have a JPEG "image" (actually a BLOB in a database) which I want to import/convert into a "Bitmap" structure in memory. The reason is that I use a third party library which is unable to work with JPEG images and I need to pass an uncompressed bitmap (as a pointer). All I found so far are ways to convert between different formats on disk but saving the image as bitmap first and re-import it will take far too long.
我有一个 JPEG“图像”（实际上是数据库中的一个 BLOB），我想将其导入/转换为内存中的“位图”结构。原因是我使用的第三方库无法处理 JPEG 图像，我需要传递未压缩的位图（作为指针）。到目前为止，我发现的只是在磁盘上的不同格式之间进行转换的方法，但首先将图像保存为位图并重新导入它会花费很长时间。
I don't know much about .NET but I think a System.Drawing.Bitmap should be able to hold the uncompressed data. I'm working with C# and Visual Studio 2008.
我对 .NET 了解不多，但我认为 System.Drawing.Bitmap 应该能够保存未压缩的数据。我正在使用 C# 和 Visual Studio 2008。
采纳答案by Mehrdad Afshari
// blob is a byte[] retrieved from DB
Bitmap bmp = new Bitmap(new MemoryStream(blob));
