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alternate entropy computation (maybe compatible with older ImageMagick)

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git-svn-id: https://callirhoe.googlecode.com/svn/trunk@132 81c8bb96-aa45-f2e2-0eef-c4fa4a15c6df
This commit is contained in:
geortz@gmail.com 2014-09-24 12:34:28 +00:00
parent 1e0940c202
commit 39d9c5d077
1 changed files with 12 additions and 4 deletions
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16
calmagick.py
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@ -44,7 +44,7 @@ class PNMImage(object):
# parse header
if state == 0:
if not strlist[i].startswith('P2'):
raise RuntimeError('invalid PNM image format')
raise RuntimeError('invalid PNM image format: %s' % strlist[i])
state += 1
# parse size
elif state == 1:
@ -169,8 +169,13 @@ if __name__ == '__main__':
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, '-resize', '2500>', '-colorspace', 'HSL', '-channel', 'B', '-separate',
'-edge', str(options.edge), '-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
# pnm_entropy = PNMImage(subprocess.check_output(['convert', img, '-resize', '2500>', '-colorspace', 'HSL', '-channel', 'B', '-separate',
# '-colorspace', 'Gray', '-edge', str(options.edge), '-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
# pnm_entropy = PNMImage(subprocess.check_output(['convert', img, '-scale', '2500>', '-colorspace', 'Gray',
# '-edge', str(options.edge), '-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
pnm_entropy = PNMImage(subprocess.check_output(['convert', img, '-scale', '512>', '(', '+clone',
'-blur', '0x%d' % options.edge, ')', '-compose', 'minus', '+swap', '-composite',
'-colorspace', 'Gray', '-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.high_entropy), options.improvement)
@ -191,7 +196,9 @@ if __name__ == '__main__':
if options.test or options.test_rect:
sys.exit(0)
pnm_lum = PNMImage(subprocess.check_output(['convert', img, '-colorspace', 'HSL', '-channel', 'B', '-separate',
# pnm_lum = PNMImage(subprocess.check_output(['convert', img, '-colorspace', 'HSL', '-channel', 'B', '-separate',
# '-colorspace', 'Gray', '-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
pnm_lum = PNMImage(subprocess.check_output(['convert', img, '-colorspace', 'Gray',
'-scale', resize, '-compress', 'None', 'pnm:-']).splitlines())
luma = pnm_lum.block_avg(best[2], best[3], int(best[1]*pnm_lum.size[0] + 0.5))
#print 'luma =', luma
@ -217,3 +224,4 @@ if __name__ == '__main__':
#convert p6.jpg -colorspace HSL -channel B -separate -resize 12x12\! -compress None pnm:-
#convert p1.jpg -colorspace HSL -channel B -separate -edge 2 -resize 12x12! -compress None pnm:-