70 lines
2 KiB
Lua
70 lines
2 KiB
Lua
local __FILE__ = (function() return string.gsub(debug.getinfo(2, 'S').source, "^@", "") end)()
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package.path = path.join(path.dirname(__FILE__), "lib", "?.lua;") .. package.path
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require 'pl'
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require 'image'
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local compression = require 'compression'
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local settings = require 'settings'
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local image_loader = require 'image_loader'
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local iproc = require 'iproc'
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local function crop_if_large(src, max_size)
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local tries = 4
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if src:size(2) >= max_size and src:size(3) >= max_size then
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local rect
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for i = 1, tries do
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local yi = torch.random(0, src:size(2) - max_size)
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local xi = torch.random(0, src:size(3) - max_size)
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rect = iproc.crop(src, xi, yi, xi + max_size, yi + max_size)
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-- ignore simple background
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if rect:float():std() >= 0 then
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break
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end
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end
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return rect
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else
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return src
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end
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end
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local function load_images(list)
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local MARGIN = 32
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local lines = utils.split(file.read(list), "\n")
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local x = {}
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for i = 1, #lines do
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local line = lines[i]
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local im, alpha = image_loader.load_byte(line)
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if alpha then
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io.stderr:write(string.format("\n%s: skip: image has alpha channel.\n", line))
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else
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if settings.max_training_image_size > 0 then
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im = crop_if_large(im, settings.max_training_image_size)
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end
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im = iproc.crop_mod4(im)
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local scale = 1.0
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if settings.random_half_rate > 0.0 then
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scale = 2.0
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end
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if im then
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if im:size(2) > (settings.crop_size * scale + MARGIN) and im:size(3) > (settings.crop_size * scale + MARGIN) then
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table.insert(x, compression.compress(im))
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else
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io.stderr:write(string.format("\n%s: skip: image is too small (%d > size).\n", line, settings.crop_size * scale + MARGIN))
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end
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else
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io.stderr:write(string.format("\n%s: skip: load error.\n", line))
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end
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end
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xlua.progress(i, #lines)
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if i % 10 == 0 then
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collectgarbage()
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end
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end
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return x
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end
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torch.manualSeed(settings.seed)
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print(settings)
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local x = load_images(settings.image_list)
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torch.save(settings.images, x)
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