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mirror of synced 2024-06-13 00:14:31 +12:00

Merge pull request #10 from nagadomi/fix_chroma_scale

fix ugly chroma scaling
This commit is contained in:
nagadomi 2015-05-22 20:14:17 +09:00
commit badfcec987
8 changed files with 43 additions and 18 deletions

0
images/gen.sh Normal file → Executable file
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@ -26,7 +26,8 @@ local function reconstruct_layer(model, x, block_size, offset)
end
return new_x
end
local function reconstruct(model, x, offset, block_size)
local reconstruct = {}
function reconstruct.image(model, x, offset, block_size)
block_size = block_size or 128
local output_size = block_size - offset * 2
local h_blocks = math.floor(x:size(2) / output_size) +
@ -54,5 +55,37 @@ local function reconstruct(model, x, offset, block_size)
return output
end
function reconstruct.scale(model, scale, x, offset, block_size)
block_size = block_size or 128
local x_jinc = iproc.scale(x, x:size(3) * scale, x:size(2) * scale, "Jinc")
x = iproc.scale(x, x:size(3) * scale, x:size(2) * scale, "Box")
local output_size = block_size - offset * 2
local h_blocks = math.floor(x:size(2) / output_size) +
((x:size(2) % output_size == 0 and 0) or 1)
local w_blocks = math.floor(x:size(3) / output_size) +
((x:size(3) % output_size == 0 and 0) or 1)
local h = offset + h_blocks * output_size + offset
local w = offset + w_blocks * output_size + offset
local pad_h1 = offset
local pad_w1 = offset
local pad_h2 = (h - offset) - x:size(2)
local pad_w2 = (w - offset) - x:size(3)
local yuv_nn = image.rgb2yuv(iproc.padding(x, pad_w1, pad_w2, pad_h1, pad_h2))
local yuv_jinc = image.rgb2yuv(iproc.padding(x_jinc, pad_w1, pad_w2, pad_h1, pad_h2))
local y = reconstruct_layer(model, yuv_nn[1], block_size, offset)
y[torch.lt(y, 0)] = 0
y[torch.gt(y, 1)] = 1
yuv_jinc[1]:copy(y)
local output = image.yuv2rgb(image.crop(yuv_jinc,
pad_w1, pad_h1,
yuv_jinc:size(3) - pad_w2, yuv_jinc:size(2) - pad_h2))
output[torch.lt(output, 0)] = 0
output[torch.gt(output, 1)] = 1
collectgarbage()
return output
end
return reconstruct

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@ -13,15 +13,11 @@ local pairwise_transform = require './lib/pairwise_transform'
local image_loader = require './lib/image_loader'
local function save_test_scale(model, rgb, file)
local input = iproc.scale(rgb,
rgb:size(3) * settings.scale,
rgb:size(2) * settings.scale)
local up = reconstruct(model, input, settings.block_offset)
local up = reconstruct.scale(model, settings.scale, rgb, settings.block_offset)
image.save(file, up)
end
local function save_test_jpeg(model, rgb, file)
local im, count = reconstruct(model, rgb, settings.block_offset)
local im, count = reconstruct.image(model, rgb, settings.block_offset)
image.save(file, im)
end
local function split_data(x, test_size)

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@ -37,12 +37,11 @@ local function waifu2x()
local model = torch.load(path.join(opt.model_dir,
("noise%d_model.t7"):format(opt.noise_level)), "ascii")
model:evaluate()
new_x = reconstruct(model, x, BLOCK_OFFSET)
new_x = reconstruct.image(model, x, BLOCK_OFFSET)
elseif opt.m == "scale" then
local model = torch.load(path.join(opt.model_dir, "scale2.0x_model.t7"), "ascii")
model:evaluate()
x = iproc.scale(x, x:size(3) * 2.0, x:size(2) * 2.0)
new_x = reconstruct(model, x, BLOCK_OFFSET)
new_x = reconstruct.scale(model, 2.0, x, BLOCK_OFFSET)
elseif opt.m == "noise_scale" then
local noise_model = torch.load(path.join(opt.model_dir,
("noise%d_model.t7"):format(opt.noise_level)), "ascii")
@ -50,9 +49,8 @@ local function waifu2x()
noise_model:evaluate()
scale_model:evaluate()
x = reconstruct(noise_model, x, BLOCK_OFFSET)
x = iproc.scale(x, x:size(3) * 2.0, x:size(2) * 2.0)
new_x = reconstruct(scale_model, x, BLOCK_OFFSET)
x = reconstruct.image(noise_model, x, BLOCK_OFFSET)
new_x = reconstruct.scale(scale_model, 2.0, x, BLOCK_OFFSET)
else
error("undefined method:" .. opt.method)
end

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@ -74,15 +74,13 @@ local function get_image(req)
end
local function apply_denoise1(x)
return reconstruct(noise1_model, x, BLOCK_OFFSET)
return reconstruct.image(noise1_model, x, BLOCK_OFFSET)
end
local function apply_denoise2(x)
return reconstruct(noise2_model, x, BLOCK_OFFSET)
return reconstruct.image(noise2_model, x, BLOCK_OFFSET)
end
local function apply_scale2x(x)
return reconstruct(scale20_model,
iproc.scale(x, x:size(3) * 2.0, x:size(2) * 2.0),
BLOCK_OFFSET)
return reconstruct.scale(scale20_model, 2.0, x, BLOCK_OFFSET)
end
local function cache_do(cache, x, func)
if path.exists(cache) then