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callirhoe/calmagick.py
geortz@gmail.com 6085b498cf improved ImageMagick support 
comments cleanup



git-svn-id: https://callirhoe.googlecode.com/svn/trunk@135 81c8bb96-aa45-f2e2-0eef-c4fa4a15c6df
2014-09-24 21:07:47 +00:00

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#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-
# callirhoe - high quality calendar rendering
# Copyright (C) 2012-2014 George M. Tzoumas
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see http://www.gnu.org/licenses/
# *****************************************************************
# #
""" high quality photo calendar composition using Imagemagick """
# #
# *****************************************************************
import sys
import subprocess
import os.path
from callirhoe import extract_parser_args
import optparse
def run_callirhoe(style, w, h, args, outfile):
subprocess.call(['callirhoe', '-s', style, '--no-footer', '--border', '0', '--paper=-%d:-%d' % (w,h)] + args + [outfile])
# TODO: parse dimensions
class PNMImage(object):
def __init__(self, strlist):
self.data = [];
state = 0;
for i in range(len(strlist)):
# skip comments
if strlist[i].startswith('#'): continue
# parse header
if state == 0:
if not strlist[i].startswith('P2'):
raise RuntimeError('invalid PNM image format: %s' % strlist[i])
state += 1
# parse size
elif state == 1:
w,h = map(int,strlist[i].split())
if w != h:
raise RuntimeError('non-square PNM image')
self.size = (w,h)
state += 1
# parse max value
elif state == 2:
self.maxval = int(strlist[i])
state += 1
# bitmap
else:
data = ' '.join(filter(lambda s: not s.startswith('#'), strlist[i:]))
intlist = map(int,data.split())
self.data = [intlist[x:x+w] for x in range(0, len(intlist), w)]
break
self.xsum = [map(lambda x: sum(self.data[y][0:x]), range(w+1)) for y in range(0,h)]
def block_avg(self, x, y, sz):
return float(sum([(self.xsum[y][x+sz] - self.xsum[y][x]) for y in range(y,y+sz)]))/(sz*sz)
def lowest_block_avg(self, sz, at_least = 0):
best = (self.maxval,1,0,0,sz) # avg, sz_ratio, x, y, sz
w,h = self.size
for y in range(0,h-sz+1):
for x in range(0,w-sz+1):
cur = (self.block_avg(x,y,sz), float(sz)/w, x, y, sz)
if cur[0] < best[0]:
best = cur
if best[0] <= at_least: return best
return best
def fit_rect(self, size_range = (0.333, 0.8), at_least = 7, relax = 0.2):
w,h = self.size
sz_range = (int(w*size_range[0]+0.5), int(w*size_range[1]+0.5))
best = self.lowest_block_avg(sz_range[0], at_least)
for sz in range(sz_range[1],sz_range[0],-1):
cur = self.lowest_block_avg(sz, at_least)
if cur[0] <= max(at_least, best[0]*(1+relax)): return cur + (best[0],)
return best + (best[0],) # avg, sz_ratio, x, y, sz, best_avg
_version = "0.1.0"
def get_parser():
"""get the argument parser object"""
parser = optparse.OptionParser(usage="usage: %prog IMAGE [options] [callirhoe-options] [--pre-magick ...] [--in-magick ...] [--post-magick ...]",
description="High quality photo calendar composition with automatic minimal-entropy placement. "
"If IMAGE is a single file, then a calendar of the current month is overlayed. If IMAGE is a directory, "
"then every month is generated starting from January of the current year (unless otherwise specified), "
"advancing one month for every photo in the IMAGE directory. "
"Photos will be reused in a round-robin fashion if more calendar "
"months are requested.", version="calmagick " + _version)
parser.add_option("--quantum", type="int", default=60,
help="choose quantization level for entropy computation [%default]")
parser.add_option("--min-size", type="float", default=0.333,
help="set minimum calendar/photo size ratio [%default]")
parser.add_option("--max-size", type="float", default=0.8,
help="set maximum calendar/photo size ratio [%default]")
parser.add_option("--low-entropy", type="float", default=7,
help="set minimum entropy threshold (0-255) for early termination (0=global minimum) [%default]")
parser.add_option("--relax", type="float", default=0.2,
help="relax minimum entropy multiplying by 1+RELAX, to allow for bigger sizes [%default]")
parser.add_option("--negative", type="float", default=100,
help="average luminosity (0-255) threshold of the overlaid area, below which a negative "
"overlay is chosen [%default]")
parser.add_option("--test", type="int", default=0,
help="test entropy minimization algorithm, without creating any calendar: 0=test disabled, "
"1=show area in original image, 2=show area in quantizer, 3=print minimum entropy area in STDOUT as X Y W H, "
"without generating any files at all [%default]")
parser.add_option("-v", "--verbose", action="store_true", default=False,
help="print progress messages")
im = optparse.OptionGroup(parser, "ImageMagick Options", "These options determine how ImageMagick is used.")
im.add_option("--brightness", type="int", default=10,
help="increase/decrease brightness by this (percent) value; "
"brightness is decreased on negative overlays [%default]")
im.add_option("--saturation", type="int", default=100,
help="set saturation of the overlaid area "
"to this value (percent) [%default]")
im.add_option("--edge", type="float", default=2,
help="radius argument for the edge detection algorithm (entropy computation) [%default]")
im.add_option("--pre-magick", action="store_true", default=False,
help="pass all subsequent arguments to ImageMagick, before entropy computation; should precede --in-magick and --post-magick")
im.add_option("--in-magick", action="store_true", default=False,
help="pass all subsequent arguments to ImageMagick, to be applied on the minimal-entropy area; should precede --post-magick")
im.add_option("--post-magick", action="store_true", default=False,
help="pass all subsequent arguments to ImageMagick, to be applied on the final output")
parser.add_option_group(im)
return parser
def parse_magick_args():
magickargs = [[],[],[]]
try:
m = sys.argv.index('--post-magick')
magickargs[2] = sys.argv[m+1:]
del sys.argv[m:]
except:
pass
try:
m = sys.argv.index('--in-magick')
magickargs[1] = sys.argv[m+1:]
del sys.argv[m:]
except:
pass
try:
m = sys.argv.index('--pre-magick')
magickargs[0] = sys.argv[m+1:]
del sys.argv[m:]
except:
pass
if ('--post-magick' in magickargs[2] or '--in-magick' in magickargs[2] or
'--pre-magick' in magickargs[2] or '--in-magick' in magickargs[1] or
'--pre-magick' in magickargs[1] or '--pre-magick' in magickargs[0]):
parser.print_help()
sys.exit(0)
return magickargs
if __name__ == '__main__':
parser = get_parser()
magickargs = parse_magick_args()
sys.argv,argv2 = extract_parser_args(sys.argv,parser,2)
(options,args) = parser.parse_args()
if len(args) < 1:
parser.print_help()
sys.exit(0)
img = args[0]
base,ext = os.path.splitext(img)
if options.verbose: print "Extracting image info..."
info = subprocess.check_output(['convert', img, '-format', '%w %h', 'info:']).split()
w,h = map(int, info)
resize = '%dx%d!' % (options.quantum, options.quantum)
if options.verbose:
print "%s %dx%d %dmp" % (img, w, h, int(w*h/1000000.0+0.5))
print "Calculating image entropy..."
pnm_entropy = PNMImage(subprocess.check_output(['convert', img, '-scale', '512>', '(', '+clone',
'-blur', '0x%d' % options.edge, ')', '-compose', 'minus', '-composite',
'-colorspace', 'Gray', '-normalize', '-unsharp', '0x5', '-scale', resize, '-normalize', '-compress', 'None', 'pnm:-']).splitlines())
if options.verbose: print "Fitting... ",
best = pnm_entropy.fit_rect((options.min_size,options.max_size), options.low_entropy, options.relax)
if options.verbose: print best
nw, nh = int(w*best[1]), int(h*best[1])
dx = int(float(w*best[2])/pnm_entropy.size[0])
dy = int(float(h*best[3])/pnm_entropy.size[1])
#print nw, nh, dx, dy
if options.test == 1:
subprocess.call(['convert', img, '-region', '%dx%d+%d+%d' % (nw,nh,dx,dy),
'-negate', base+'-0'+ext])
if options.test == 2:
subprocess.call(['convert', img, '-scale', '512>', '(', '+clone',
'-blur', '0x%d' % options.edge, ')', '-compose', 'minus', '-composite',
'-colorspace', 'Gray', '-normalize', '-unsharp', '0x5', '-scale', resize, '-normalize',
'-scale', '%dx%d!' % (w,h), '-region', '%dx%d+%d+%d' % (nw,nh,dx,dy),
'-negate', base+'-0'+ext])
elif options.test == 3:
print dx, dy, nw, nh
if options.test: sys.exit(0)
if options.verbose: print "Measuring luminance... ",
pnm_lum = PNMImage(subprocess.check_output(['convert', img, '-colorspace', 'Gray',
'-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
luma = pnm_lum.block_avg(*best[2:5])
#print 'luma =', luma
negative = luma < options.negative
if options.verbose: print "DARK" if negative else "LIGHT"
if options.verbose: print "Generating calendar image (transparent)..."
run_callirhoe('mono_transparent', nw, nh, argv2, '_transparent_cal.png');
if options.verbose: print "Composing overlay..."
overlay = ['(', '-negate', '_transparent_cal.png', ')'] if negative else ['_transparent_cal.png']
subprocess.call(['convert', img] + magickargs[0] + ['-region', '%dx%d+%d+%d' % (nw,nh,dx,dy)] +
([] if options.brightness == 0 else ['-brightness-contrast', '%d' % (-options.brightness if negative else options.brightness)]) +
([] if options.saturation == 100 else ['-modulate', '100,%d' % options.saturation]) + magickargs[1] +
['-compose', 'over'] + overlay + ['-geometry', '+%d+%d' % (dx,dy), '-composite'] +
magickargs[2] + [base+'-0'+ext])
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