Hi everyone

I am swithcing from programin in matlab to pytorch and yet there are alot to learn for me.

I have a function as following, it takes an input in 4D, bachsize x channels x dimention1 x dimention2 and

do some operations on it and gives the output in the same size.

I will really appreciate it if you guys can help me and tell me if there is a more efficient and simple way to write this function in pytorch (so i can get rid of the loops)

Thanks in advance …

def EdgeDetection(Input_Temp):

`K1 = torch.FloatTensor([[1,0,0],[0,-1,0],[0,0,0]]).to(device) K2 = torch.FloatTensor([[0,1,0],[-1,0,0],[0,0,0]]).to(device) # print "The input size is" , Input_Temp.size() , "\n" #The input size is for example (128, 3, 32, 32) D = 0 # D is responsible for number of Batches or the 0st dimention for BatchNum in range(Input_Temp.size(0)): C = 0 # C is responsible for number of channels or the 1st dimention for ChannelNum in range(Input_Temp.size(1)): TempImg = Input_Temp[BatchNum,ChannelNum,:,:].clone() TempImgNormalize = TempImg # Makeing the input to have size of d x c x m x m so it can be used in conv2d A1 = torch.unsqueeze(torch.unsqueeze(TempImgNormalize,0),0).to(device) Gx = F.conv2d(A1, torch.unsqueeze(torch.unsqueeze(K1,0),0),padding= K1.size(0)/2 ) Gy = F.conv2d(A1, torch.unsqueeze(torch.unsqueeze(K2,0),0),padding= K2.size(0)/2 ) GM = (Gx**2 + Gy**2)**0.5 # concatinating the results, concatenating along the 1st dimention: if C == 0: APP = GM else: APP = torch.cat((APP,GM),1) C += 1 # concatinating the results, concatenating along the 0st dimention: if D == 0: Final = APP Final = Final.to(device) else: Final = torch.cat((Final,APP),0) D = D + 1 return Final`