Create a BitmapImage from ushort[]

Question

Is it possible to create a BitmapImage from a ushort array? and if so how?

At the minute I'm creating a Bitmap, converting it to a Bitmap array and displaying it, but this is too slow, I need to continuously update the image (live video feed), while each frame is being created the UI studders, this is making my app very slow when video is running. So I need to get my ushort[] into a BitmapImage as fast as possible

Thanks, Eamonn

image data, numbers from 0 - 65000, represents a grayscale image — Eamonn McEvoy, Mar 22 '11 at 10:17
man, this is information that should have been in your question when you asked it!! remember this for your next question — Markus Hütter, Mar 22 '11 at 10:48

score 2 · Answer 1 · edited May 23 '17 at 10:33

2

here you have an example of how to get a BitmapImage through a MemoryStream, this might help you

you can use BitConverter to convert ushorts to byte for input to MemoryStream

edited May 23 '17 at 10:33

Community

1
1

answered Mar 21 '11 at 18:28

Markus Hütter

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score 1 · Accepted Answer · answered Mar 21 '11 at 18:49

Assuming you're working with values between 0 and 255 you could cast it into an array of bytes and then load it into a MemoryStream:

// Please note that with values higher than 255 the program will throw an exception
checked
{
    ushort[] values = { 200, 100, 30/*, 256*/ };
    var bytes = (from value in values
                 select (byte)value).ToArray();

    // Taken from: http://stackoverflow.com/questions/5346727/wpf-convert-memory-stream-to-bitmapimage
    using (var stream = new MemoryStream(data))
    {
        var bitmap = new BitmapImage();
        bitmap.BeginInit();
        bitmap.StreamSource = stream;
        bitmap.CacheOption = BitmapCacheOption.OnLoad;
        bitmap.EndInit();
        bitmap.Freeze();
    }
}

the data is 0 - 65000 but I will try scaling it down and see if this method is faster than my current one — Eamonn McEvoy, Mar 22 '11 at 10:22

Create a BitmapImage from ushort[]

2 Answers2