I have a 3 dimensional byte array.

The 3-d array represents a jpeg image. Each channel/array represents part of the RGB spectrum.

I am not interested in retaining black pixels. A black pixel is represented by this atypical arrangement:

myarray[0,0,0] =0;
myarray[0,0,1] =0;
myarray[0,0,2] =0;

So, I have flattened this 3d array out to a 1d array by doing this byte[] AFlatArray = new byte[width x height x 3] and then assigning values respective to the coordinate.

But like I said I do not want black pixels. So this array has to only contain color pixels with the x,y coordinate. The result I want is to re-represent the image from the i dimension byte array that only contains non-black pixels. How do I do that?

It looks like I have to store black pixels as well because of the xy coordinate system. I have tried writing to a binary file but the size of that file is greater than the jpeg file as the jpeg file is compressed.

I am using c#.