-
Notifications
You must be signed in to change notification settings - Fork 18
/
Real.lua
48 lines (44 loc) · 1.28 KB
/
Real.lua
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
-- make a complex input real by either taking the modulus, or discarding the imaginary part
require 'nn'
local Real, parent = torch.class('nn.Real','nn.Module')
function Real:__init(type)
parent.__init(self)
if type == 'mod' then
self.modulus = true
elseif type == 'real' then
self.modulus = false
else
error('type must be mod or real')
end
end
-- we assume inputs are of the form [batch x planes x iH x iW x 2]
function Real:updateOutput(input)
local b = input:size(1)
local p = input:size(2)
local x = input:size(3)
local y = input:size(4)
input:resize(b*p,x,y,2)
self.output:resize(b*p,x,y)
if self.modulus then
self.output:copy(input:norm(2,4))
else
self.output:copy(input:select(4,1))
end
input:resize(b,p,x,y,2)
self.output:resize(b,p,x,y)
return self.output
end
function Real:updateGradInput(input, gradOutput)
if self.modulus then
libspectralnet.modulus_updateGradInput(input, self.output, self.gradInput, gradOutput)
else
local b = input:size(1)
local p = input:size(2)
local x = input:size(3)
local y = input:size(4)
self.gradInput:resizeAs(input)
self.gradInput:select(5,1):copy(gradOutput)
self.gradInput:select(5,2):zero()
end
return self.gradInput
end