在c#中将原始图像转换为位图

时间:2013-07-30 20:42:11

标签: c# image bitmap

我的代码目前看起来像这样:

if (fe == "CR2")
{
    Image img = null;
    byte[] ba = File.ReadAllBytes(open.FileName);
    using (Image raw = Image.FromStream(new MemoryStream(ba)))
    {
        img = raw;
    }
    Bitmap bm = new Bitmap(img);
    pictureBox1.Image = bm;
    statusl.Text = fe;
}

当我打开RAW图像时程序停止,Visual Studio说:

  

参数无效:Image raw = Image.FromStream(new MemoryStream(ba))

请帮忙!如何在PictureBox中显示RAW文件?

3 个答案:

答案 0 :(得分:5)

像这样创建位图:

Bitmap bmp = (Bitmap) Image.FromFile(open.FileName);

或不使用位图:

 this.pictureBox1.Image = Image.FromFile(open.FileName);

示例WPF:

BitmapDecoder bmpDec = BitmapDecoder.Create(new Uri(origFile),
BitmapCreateOptions.DelayCreation, BitmapCacheOption.None);
BitmapEncoder bmpEnc = new BmpBitmapEncoder();
bmpEnc.Frames.Add(bmpDec.Frames[0]);
Stream ms = new MemoryStream();
bmpEnc.Save(ms);
Image srcImage = Bitmap.FromStream(ms);

答案 1 :(得分:3)

您实际上是通过指定using (Image raw = Image.FromStream(new MemoryStream(ba)))稍后将Disposed图像实例分配给picturebox来处理图像,这会导致此异常。为了使你工作,你要么不要处置或克隆图像。

Bitmap raw = Image.FromStream(new MemoryStream(ba) as Bitmap;
pictureBox1.Image = raw;

或者只是克隆

using (Image raw = Image.FromStream(new MemoryStream(ba)))
{
    img = raw.Clone() as Bitmap;
}

以上两点都应该有效

答案 2 :(得分:0)

你试试这段代码:

private static void SaveImageToRawFile(string strDeviceName, Byte[] Image, int nImageSize)
    {
        string strFileName = strDeviceName;
        strFileName += ".raw";

        FileStream vFileStream = new FileStream(strFileName, FileMode.Create);
        BinaryWriter vBinaryWriter = new BinaryWriter(vFileStream);
        for (int vIndex = 0; vIndex < nImageSize; vIndex++)
        {
            vBinaryWriter.Write((byte)Image[vIndex]);
        }
        vBinaryWriter.Close();
        vFileStream.Close();
    }

    private static void LoadRawFile(string strDeviceName, out Byte[] Buffer)
    {
        FileStream vFileStream = new FileStream(strDeviceName, FileMode.Open);
        BinaryReader vBinaryReader = new BinaryReader(vFileStream);

        Buffer = new Byte[vFileStream.Length];

        Buffer = vBinaryReader.ReadBytes(Convert.ToInt32(vFileStream.Length));

        vBinaryReader.Close();
        vFileStream.Close();
    }