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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,34 @@ | ||
| # encoding=UTF-8 | ||
| # Copyright © 2009 Jakub Wilk <[email protected]> | ||
| # | ||
| # This package is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation; version 2 dated June, 1991. | ||
| # | ||
| # This package is distributed in the hope that it will be useful, but | ||
| # WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| # General Public License for more details. | ||
|
|
||
| import sys | ||
| import imp | ||
|
|
||
| class Loader(object): | ||
|
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| def __init__(self, *args): | ||
| self.args = args | ||
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| def load_module(self, fullname): | ||
| return imp.load_module(fullname, *self.args) | ||
|
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| class Importer(object): | ||
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| def find_module(self, fullname, path=None): | ||
| if fullname != 'didjvu': | ||
| return | ||
| args = imp.find_module('lib', path) | ||
| return Loader(*args) | ||
|
|
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| sys.meta_path = [Importer()] | ||
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| # vim:ts=4 sw=4 et |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,159 @@ | ||
| #!/usr/bin/python | ||
| # encoding=UTF-8 | ||
|
|
||
| # Copyright © 2009 Jakub Wilk <[email protected]> | ||
| # | ||
| # This program is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation; version 2 dated June, 1991. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, but | ||
| # WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| # General Public License for more details. | ||
|
|
||
| import os | ||
| import sys | ||
|
|
||
| import Image | ||
|
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| from . import gamera_extra as gamera | ||
| from . import djvu_extra as djvu | ||
| from . import cli | ||
| from . import tinylog | ||
|
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| __version__ = '0.1' | ||
|
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| def check_tty(): | ||
| if sys.stdout.isatty(): | ||
| print >>sys.stderr, 'I won\'t write DjVu data to a terminal.' | ||
| sys.exit(1) | ||
|
|
||
| def copy_file(input_file, output_file): | ||
| length = 0 | ||
| while 1: | ||
| block = input_file.read(0x1000) | ||
| if not block: | ||
| break | ||
| length += len(block) | ||
| output_file.write(block) | ||
| return length | ||
|
|
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| def get_subsampled_dim(image, subsample): | ||
| width = (image.ncols + subsample - 1) // subsample | ||
| height = (image.nrows + subsample - 1) // subsample | ||
| return gamera.Dim(width, height) | ||
|
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| def subsample_fg(image, mask, options): | ||
| ratio = options.subsample | ||
| subsampled_size = get_subsampled_dim(mask, ratio) | ||
| mask = mask.to_greyscale() | ||
| mask = mask.threshold(254) | ||
| mask = mask.erode() | ||
| subsampled_image = gamera.Image((0, 0), subsampled_size, pixel_type=gamera.RGB) | ||
| subsampled_mask = gamera.Image((0, 0), subsampled_size, pixel_type=gamera.ONEBIT) | ||
| y0 = 0 | ||
| width, height = image.ncols, image.nrows | ||
| image_get = image.get | ||
| mask_get = mask.get | ||
| subsampled_image_set = subsampled_image.set | ||
| subsampled_mask_set = subsampled_mask.set | ||
| for sy in xrange(0, subsampled_image.nrows): | ||
| x0 = 0 | ||
| for sx in xrange(0, subsampled_image.ncols): | ||
| n = r = g = b = 0 | ||
| y = y0 | ||
| for dy in xrange(ratio): | ||
| if y >= height: | ||
| break | ||
| x = x0 | ||
| for dx in xrange(ratio): | ||
| if x >= width: | ||
| break | ||
| pt = (x, y) | ||
| if mask_get(pt): | ||
| n += 1 | ||
| pixel = image_get(pt) | ||
| r += pixel.red | ||
| g += pixel.green | ||
| b += pixel.blue | ||
| x += 1 | ||
| y += 1 | ||
| if n > 0: | ||
| r = (r + n // 2) // n | ||
| g = (g + n // 2) // n | ||
| b = (b + n // 2) // n | ||
| subsampled_image_set((sx, sy), gamera.RGBPixel(r, g , b)) | ||
| else: | ||
| subsampled_mask_set((sx, sy), 1) | ||
| x0 += ratio | ||
| y0 += ratio | ||
| return subsampled_image, subsampled_mask | ||
|
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| def subsample_bg(image, mask, options): | ||
| dim = get_subsampled_dim(mask, options.subsample) | ||
| mask = mask.to_greyscale() | ||
| mask = mask.resize(dim, 0) | ||
| mask = mask.dilate().dilate() | ||
| mask = mask.threshold(254) | ||
| image = image.resize(dim, 1) | ||
| return image, mask | ||
|
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||
| def make_layer(image, mask, subsampler, options): | ||
| image, mask = subsampler(image, mask, options) | ||
| return djvu.photo_to_djvu( | ||
| image=image.to_pil(), mask_image=gamera.to_pil_1bpp(mask), | ||
| slices=options.slices, crcb=options.crcb | ||
| ) | ||
|
|
||
| def main(): | ||
| options = cli.OptionParser( | ||
| argv=sys.argv, version=__version__, | ||
| methods=gamera.methods, default_method=gamera.methods['djvu'] | ||
| ) | ||
| djvu.DEBUG = options.verbosity >= 2 | ||
| log = tinylog.Log(options.verbosity) | ||
| if options.output is sys.stdout: | ||
| check_tty() | ||
| gamera.init() | ||
| image_filename = options.image_filename | ||
| bytes_in = os.path.getsize(image_filename) | ||
| print >>log(1), '%s:' % image_filename | ||
| print >>log(1), '- reading image' | ||
| image = gamera.from_pil(Image.open(image_filename)) | ||
| width, height = image.ncols, image.nrows | ||
| print >>log(2), '- image size: %d x %d' % (width, height) | ||
| if options.mask_filename is None: | ||
| method = options.method | ||
| pixel_types = method.self_type.pixel_types | ||
| t_image = image | ||
| if image.data.pixel_type not in pixel_types: | ||
| if gamera.RGB in pixel_types: | ||
| t_image = image.to_rgb() | ||
| elif gamera.GREYSCALE in pixel_types: | ||
| t_image = image.to_greyscale() | ||
| print >>log(1), '- thresholding' | ||
| mask = options.method()(t_image) | ||
| else: | ||
| mask = gamera.load_image(options.mask_filename) | ||
| print >>log(1), '- converting to DjVu' | ||
| dpi = options.dpi or 300 | ||
| sjbz_file = djvu.bitonal_to_djvu(gamera.to_pil_1bpp(mask), loss_level=options.jb2_loss_level) | ||
| if options.fg_bg_defaults: | ||
| image = image.to_pil() | ||
| djvu_file = djvu.assemble_djvu(width, height, dpi, sjbz=sjbz_file, image=image) | ||
| else: | ||
| fg_djvu = make_layer(image, mask, subsample_fg, options.fg_options) | ||
| bg_djvu = make_layer(image, mask, subsample_bg, options.bg_options) | ||
| fg44, bg44 = map(djvu.djvu_to_iw44, [fg_djvu, bg_djvu]) | ||
| djvu_file = djvu.assemble_djvu(width, height, dpi, fg44=fg44, bg44=bg44, sjbz=sjbz_file) | ||
| try: | ||
| bytes_out = copy_file(djvu_file, options.output) | ||
| finally: | ||
| djvu_file.close() | ||
| bits_per_pixel = 8.0 * bytes_out / (width * height) | ||
| ratio = 1.0 * bytes_in / bytes_out | ||
| percent_saved = (1.0 * bytes_in - bytes_out) * 100 / bytes_in; | ||
| print >>log(2), '- %(bits_per_pixel).3f bits/pixel; %(ratio).3f:1, %(percent_saved).2f%% saved, %(bytes_in)d bytes in, %(bytes_out)d bytes out' % locals() | ||
|
|
||
| # vim:ts=4 sw=4 et |
File renamed without changes.
File renamed without changes.
File renamed without changes.