2016-07-05 05:42:40 +12:00
|
|
|
local pairwise_utils = require 'pairwise_transform_utils'
|
|
|
|
local iproc = require 'iproc'
|
2016-09-11 08:07:42 +12:00
|
|
|
local gm = {}
|
|
|
|
gm.Image = require 'graphicsmagick.Image'
|
2016-07-05 05:42:40 +12:00
|
|
|
local pairwise_transform = {}
|
|
|
|
|
|
|
|
local function crop_if_large(x, y, scale_y, max_size, mod)
|
|
|
|
local tries = 4
|
|
|
|
if y:size(2) > max_size and y:size(3) > max_size then
|
|
|
|
assert(max_size % 4 == 0)
|
|
|
|
local rect_x, rect_y
|
|
|
|
for i = 1, tries do
|
|
|
|
local yi = torch.random(0, y:size(2) - max_size)
|
|
|
|
local xi = torch.random(0, y:size(3) - max_size)
|
|
|
|
if mod then
|
|
|
|
yi = yi - (yi % mod)
|
|
|
|
xi = xi - (xi % mod)
|
|
|
|
end
|
|
|
|
rect_y = iproc.crop(y, xi, yi, xi + max_size, yi + max_size)
|
|
|
|
rect_x = iproc.crop(x, xi / scale_y, yi / scale_y, xi / scale_y + max_size / scale_y, yi / scale_y + max_size / scale_y)
|
|
|
|
-- ignore simple background
|
|
|
|
if rect_y:float():std() >= 0 then
|
|
|
|
break
|
|
|
|
end
|
|
|
|
end
|
|
|
|
return rect_x, rect_y
|
|
|
|
else
|
|
|
|
return x, y
|
|
|
|
end
|
|
|
|
end
|
|
|
|
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)
|
|
|
|
|
2016-07-20 17:06:17 +12:00
|
|
|
x, y = crop_if_large(x, y, scale_y, options.max_size, scale_y)
|
2016-07-05 05:42:40 +12:00
|
|
|
assert(x:size(3) == y:size(3) / scale_y and x:size(2) == y:size(2) / scale_y)
|
|
|
|
local batch = {}
|
2016-09-09 01:35:27 +12:00
|
|
|
local lowres_y = pairwise_utils.low_resolution(y)
|
2016-07-05 05:42:40 +12:00
|
|
|
local xs, ys, ls = pairwise_utils.flip_augmentation(x, y, lowres_y)
|
|
|
|
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
|
2016-09-11 08:07:42 +12:00
|
|
|
yc = iproc.rgb2yuv(yc)[1]:reshape(1, yc:size(2), yc:size(3))
|
|
|
|
xc = iproc.rgb2yuv(xc)[1]:reshape(1, xc:size(2), xc:size(3))
|
2016-07-05 05:42:40 +12:00
|
|
|
end
|
|
|
|
table.insert(batch, {xc, iproc.crop(yc, offset, offset, size - offset, size - offset)})
|
|
|
|
end
|
2016-09-09 01:35:27 +12:00
|
|
|
|
2016-07-05 05:42:40 +12:00
|
|
|
return batch
|
|
|
|
end
|
|
|
|
return pairwise_transform
|