字节数组到图像C＃

Question

I have a simple byte string (elements of a matrix read row by row) . I wish to plot it in a image in c#. Is there any simple way to do this.

On the internet I found byte array to image conversion , but I assume that for this the byte string should have a certain format because I did not see any establishing of the width and height.

Any suggestions?

Answer 1

Assuming your bytes string contains color data for each pixel of an image in a one of the supported pixel formats , you can create a Bitmap with a specific size using this constructor: Bitmap(int width, int height .

Then lock the bitmap into system memory using Bitmap.LockBits(Rectangle, ImageLockMode, PixelFormat) and get the address of the first pixel data in the bitmap using BitmapData.Scan0 .

After that, you can manipulate the raw bitmap data. For example, you can copy your bytes into it using, for example, Marshal.Copy(Byte[], Int32, IntPtr, Int32) .

And finally unlock the bitmap with Bitmap.UnlockBits(BitmapData) .

Voila! You have created a bitmap from a byte array.

Answer 2

Have you tried this code:

public Bitmap ConvertBytesToImage(byte[] BytesToConvert)
{
    MemoryStream ms = new MemoryStream(BytesToConvert);
    try { return new Bitmap(ms); }
    catch { return null; }
}