sobel operator in C# using emgu cv

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C#

hello everyone,,

i am feeling difficulty in applying sobel operator in c# using emguCv.
your kind comments would be quite valuable help for me in this regard.

here is the code::

Image<Bgr, Byte> imOriginal;
Image<Bgr, Byte> imgProcessed;
Image<Gray, Byte> imgProcessed1;
Image<Gray, Byte> imEdge;

imgProcessed = imgProcessed.SmoothGaussian(9);
 imgProcessed1= imgProcessed.Convert<Gray,byte>();
 imEdge = (imgProcessed1.Sobel(1, 0, 3));

Error 2
Cannot implicitly convert type 'Emgu.CV.Image<emgu.cv.structure.gray,float>' to 'Emgu.CV.Image<emgu.cv.structure.gray,byte>

thanx in advance.

regards
baltee