55 lines
1.5 KiB
Lua
55 lines
1.5 KiB
Lua
local pairwise_utils = require 'pairwise_transform_utils'
|
|
local iproc = require 'iproc'
|
|
local gm = {}
|
|
gm.Image = require 'graphicsmagick.Image'
|
|
local pairwise_transform = {}
|
|
|
|
function pairwise_transform.user(x, y, size, offset, n, options)
|
|
assert(x:size(1) == y:size(1))
|
|
|
|
local scale_y = y:size(2) / x:size(2)
|
|
assert(x:size(3) == y:size(3) / scale_y)
|
|
|
|
x, y = pairwise_utils.preprocess_user(x, y, scale_y, size, options)
|
|
assert(x:size(3) == y:size(3) / scale_y and x:size(2) == y:size(2) / scale_y)
|
|
local batch = {}
|
|
local lowres_y = nil
|
|
local xs ={x}
|
|
local ys = {y}
|
|
local ls = {}
|
|
|
|
if options.active_cropping_rate > 0 then
|
|
lowres_y = pairwise_utils.low_resolution(y)
|
|
end
|
|
if options.pairwise_flip then
|
|
xs, ys, ls = pairwise_utils.flip_augmentation(x, y, lowres_y)
|
|
end
|
|
assert(#xs == #ys)
|
|
for i = 1, n do
|
|
local t = (i % #xs) + 1
|
|
local xc, yc = pairwise_utils.active_cropping(xs[t], ys[t], ls[t], size, scale_y,
|
|
options.active_cropping_rate,
|
|
options.active_cropping_tries)
|
|
xc = iproc.byte2float(xc)
|
|
yc = iproc.byte2float(yc)
|
|
if options.rgb then
|
|
else
|
|
yc = iproc.rgb2y(yc)
|
|
xc = iproc.rgb2y(xc)
|
|
end
|
|
if options.gcn then
|
|
local mean = xc:mean()
|
|
local stdv = xc:std()
|
|
if stdv > 0 then
|
|
xc:add(-mean):div(stdv)
|
|
else
|
|
xc:add(-mean)
|
|
end
|
|
end
|
|
table.insert(batch, {xc, iproc.crop(yc, offset, offset, size - offset, size - offset)})
|
|
end
|
|
|
|
return batch
|
|
end
|
|
return pairwise_transform
|