使用字节数组将TIF图像显示为可写位图（C＃）

Question

I've a byte array of a tiff image. I want to form 3 images from it,that i'll do later but the problem is i'm not able to display the original image as it is.

Here is my xaml:

<Image Grid.Row="0" Grid.Column="0" Name="ReferenceImage"/>

xaml.cs code:

public MainWindow()
        {
            InitializeComponent();
            ImagePath = @"G:\TiffImage\Test.TIF"
            DisplayAllImages();
        }

        private void DisplayAllImages()
        {

            byte[] imageSize = File.ReadAllBytes(ImagePath);

            ReferenceImage.Source = DisplayAllImages(imageSize, 64, 64);
     }

private WriteableBitmap DisplayAllImages(byte[] imageData,int height,int width)
        {
            if (imageData != null)
            {

                PixelFormat format = PixelFormats.Gray8;
                WriteableBitmap wbm = new WriteableBitmap(height, width, 96, 96, format, null);
                wbm.WritePixels(new Int32Rect(0, 0, height, width), imageData, 1*width, 0);
                return wbm;
            }
            else
            {
                return null;
            }

        }

My main aim is to display image using byte array like this way only, so that i can extract byte array to form other image as per requirements.

Answer 1

The image file contains encoded bitmap data. In order to access the raw pixels you would first have to decode the bitmap:

BitmapSource bitmap;

using (var fileStream = new FileStream(ImagePath, FileMode.Open, FileAccess.Read))
{
    bitmap = BitmapFrame.Create(
        fileStream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
}

Now you would get the raw pixels by calling the CopyPixels method of the BitmapSource:

var width = bitmap.PixelWidth;
var height = bitmap.PixelHeight;
var stride = (width * bitmap.Format.BitsPerPixel + 7) / 8;
var imageData = new byte[height * stride];

bitmap.CopyPixels(imageData, stride, 0);

Answer 2

我没有得到期望的图像。虽然我能够生成几乎匹配75％但不完全匹配的图像。