Hi @Saeed_Izadi1, did you find a solution to this problem?
@ptrblck What Saeed was after is the following:
A normal convolution between a [Bx3x5x5] input and a [1x3x3x3] kernel would produce a [Bx1x4x4] response. The reason for that is that after performing spatial convolution channel-wise, i.e. along the last 2 indices ( and producing a tensor [Bx1x3x4x4] ), the channel-wise responses are summed up into a single channel and thus convolution produces a tensor [Bx1x4x4]. Is there a way to obtain access to the tensor [Bx1x3x4x4] ?
Thanks a lot! 
Regards,
David