How To use gray level images (Ultrasound) in CNN as they have 1 channel and CNN use 3 channels (RGB) ?

How can i customize my Convolution Neural Network (CNN) to deal with gray images (2D ultrasound) as the input layer is something like (3, 256, 256) the 3 represents the R, G and B channel in...

23 June 2018 9,159 8 View