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ocropus-gtedit
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ocropus-gtedit
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#!/usr/bin/env python
from __future__ import print_function
from pylab import *
import argparse,codecs,re,os.path,ocrolib,base64
from lxml import etree
import urllib2
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers(help="subcommands",dest="subparser_name")
p_gttext = subparsers.add_parser("write",help="incorporate transcriptions into book dir")
p_gttext.add_argument('-x','--extension',default='.gt.txt')
p_gttext.add_argument('-O','--overwrite',action="store_true")
p_gttext.add_argument('-e','--allowempty',action="store_true")
p_gttext.add_argument('-D','--deleteempty',action="store_true")
p_gttext.add_argument('gtfile')
p_gttext.add_argument('bookdir')
p_text = subparsers.add_parser("text",help="generate text")
p_text.add_argument('-o','--output',default="correct.txt")
p_text.add_argument('-r','--reffile',default="reference.html")
p_text.add_argument('-x','--extension',default='.txt')
p_text.add_argument('-H','--height',default=32,type=int)
p_text.add_argument('files',nargs='+')
p_org = subparsers.add_parser("org",help="generate orgmode text")
p_org.add_argument('-o','--output',default="correct.txt")
p_org.add_argument('-r','--reffile',default="reference.html")
p_org.add_argument('-x','--extension',default='.txt')
p_org.add_argument('-H','--height',default=32,type=int)
p_org.add_argument('files',nargs='+')
p_html = subparsers.add_parser("html",help="generate html")
p_html.add_argument('-d','--debug',action="store_true")
p_html.add_argument('-o','--output',default="correction.html")
p_html.add_argument('-x','--extension',default='.txt')
p_html.add_argument('-f','--fontsize',default=20,type=int)
p_html.add_argument('-H','--height',default=24,type=int)
p_html.add_argument("-M","--maxsize",default=10000,type=int)
p_html.add_argument('files',nargs='+')
p_ext = subparsers.add_parser("extract",help="extract from html")
p_ext.add_argument('-p','--prefix',default=None)
p_ext.add_argument('-O','--overwrite',action="store_true")
p_ext.add_argument('-x','--extension',default=".gt.txt")
p_ext.add_argument('-e','--allowempty',action="store_true")
p_ext.add_argument('html')
stream = None
def P(x,*args):
global stream
stream.write(x%args)
stream.write("\n")
args = parser.parse_args()
if args.subparser_name=="write":
assert os.path.isdir(args.bookdir)
gtstream = codecs.open(args.gtfile,"r","utf-8")
for lineno,s in enumerate(gtstream.readlines()):
s = s.strip()
if s=="": continue
if s[0]=="#": continue
match = re.search(ur'^(\d{4})\.(\d{10})\s*(.*?)$(?i)',s)
if not match:
if "[[" not in s: print("???", lineno, ":", s)
continue
page,line,transcript = match.groups()
page = int(page)
line = int(line)
dest = args.bookdir+"/%04d/%06x"%(page,line)+args.extension
transcript = transcript.strip()
if transcript==u"" and args.deleteempty:
if os.path.exists(dest):
print(dest, ": empty transcript; removing")
os.unlink(dest)
continue
elif transcript==u"" and not args.allowempty:
print(dest, ": empty transcript; skipping")
continue
elif os.path.exists(dest) and not args.overwrite:
print("???", dest, ": already exists")
continue
print(dest, transcript)
ocrolib.write_text(dest,transcript)
if args.subparser_name=="text":
stream = codecs.open(args.output,"w","utf-8")
for i,fname in enumerate(args.files):
base,_ = ocrolib.allsplitext(fname)
page,line = re.search(r'(\d{4})/([0-9a-f]{6})\.[^/]*$(?i)',fname).groups()
page = int(page)
line = int(line,16)
if os.path.exists(base+args.extension):
text = ocrolib.read_text(base+args.extension)
else:
text = u""
P(u"%04d.%010d\t%s",page,line,text)
stream.close()
stream = codecs.open(args.reffile,"w","utf-8")
P("<!DOCTYPE html>")
P("<html>")
P("<head>")
P('<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>')
P("</head>")
P("<body>")
P("<table border=1>")
for i,fname in enumerate(args.files):
base,_ = ocrolib.allsplitext(fname)
page,line = re.search(r'(\d{4})/([0-9a-f]{6})\.[^/]*$(?i)',fname).groups()
page = int(page)
line = int(line,16)
P("<tr>")
P(u"<td>%04d.%010d</td>",page,line)
P(u"<td><img alt='line' src='%s' height=%d /></td>",fname,args.height)
P("</tr>")
P("</table>")
P("</html>")
stream.close()
if args.subparser_name=="org":
stream = codecs.open(args.output,"w","utf-8")
if not ".dew.png" in args.files[0]:
print("# use of dewarped files (.dew.png) is recommended in org mode")
if not ".png" in args.files[0]:
print("# warning: your file arguments don't look like image files")
P("# -*- Org -*-")
for i,fname in enumerate(args.files):
base,_ = ocrolib.allsplitext(fname)
page,line = re.search(r'(\d{4})/([0-9a-f]{6})\.[^/]*$(?i)',fname).groups()
page = int(page)
line = int(line,16)
if os.path.exists(base+args.extension):
text = ocrolib.read_text(base+args.extension)
else:
text = u""
P(u" \t[[%s]]",fname)
P(u"%04d.%010d\t%s",page,line,text)
P(u"")
P("# Local Variables:")
P("# eval: (iimage-mode)")
P("# eval: (set-face-attribute 'default (selected-frame) :height 180)")
P("# End:")
stream.close()
def approx_split_range(n,k):
if n%k==0:
chunks = [n//k]*k
else:
l = n//k+1
d = n-k*(l-1)
chunks = [l-1+(i<d) for i in range(k)]
print(chunks)
return chunks
def approx_split(l,k):
chunks = approx_split_range(len(l),k)
start = 0
for c in chunks:
yield l[start:start+c]
start += c
if args.subparser_name=="html":
for i,fname in enumerate(args.files):
assert not os.path.isabs(fname),"absolute file names not allowed"
if len(args.files)<=args.maxsize:
chunks = [(args.output,args.files)]
else:
print("# too many lines for one output file; splitting")
chunks = approx_split(args.files,len(args.files)//args.maxsize)
base = re.sub(r'\..*?$','',args.output)
chunks = [(base+"-%03d"%i+".html",c) for i,c in enumerate(chunks)]
chunks[0] = (args.output,chunks[0][1])
for oname,files in chunks:
print("# writing", oname)
stream = codecs.open(oname,"w","utf-8")
# P("<!DOCTYPE html>")
P('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">')
P("<html>")
P("<head>")
P('<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />')
P('<title>%s</title>', oname)
P("</head>")
P("<body>")
for i,fname in enumerate(args.files):
base,_ = ocrolib.allsplitext(fname)
if os.path.exists(base+args.extension):
text = ocrolib.read_text(base+args.extension)
else:
text = u""
with open(fname,"rb") as pngstream: png = pngstream.read()
png = base64.b64encode(png)
png = "data:image/png;base64,"+png
P("<table>")
P("<tr><td style='border:0px;color:#808080;font-size:12px'>%s</td></tr>",fname)
P("<tr><td><img alt='line' src='%s' height='%d' /></td></tr>",png,args.height)
P("<tr><td style='border: solid 1px #808080;color: #000060;font-size:%dpx;min-height:%dpx' contenteditable='true' spellcheck='true'>%s</td></tr>",args.fontsize,args.fontsize,text)
P("</table>")
P("<p />")
P("</body>")
P("</html>")
stream.close()
def url_decode(image):
prefix = "data:image/png;base64,"
if image.startswith(prefix):
data = image[len(prefix):]
data = base64.b64decode(data)
else:
data = urllib2.urlopen(image).read()
return data
if args.subparser_name=="extract":
parser = etree.HTMLParser()
with codecs.open(args.html,"r","utf-8") as stream:
tree = etree.parse(stream,parser)
count = 0
for table in tree.iter('table'):
rows = [r for r in table.iter('tr')]
dest = rows[0].findtext(".//td")
src = rows[1].find(".//img").get("src")
png = url_decode(src)
transcript = rows[2].findtext(".//td")
if transcript=="" and not args.allowempty:
print("#", dest, "has empty transcript; skipping")
continue
count += 1
if args.prefix is not None:
dest = args.prefix+"/%04d/01%04x.bin.png"%((count//30)+1,(count%30)+1)
print(dest, "\t", transcript)
assert not os.path.isabs(dest)
assert ".." not in dest
assert "/." not in dest
d = os.path.dirname(dest)
if not os.path.exists(d): os.makedirs(d)
if os.path.exists(dest) and not args.overwrite:
print("#", dest, "exists, not writing")
else:
with open(dest,"wb") as stream: stream.write(png)
base,_ = ocrolib.allsplitext(dest)
gtname = base+args.extension
if os.path.exists(gtname) and not args.overwrite:
print("#", gtname, "exists, not writing")
else:
ocrolib.write_text(gtname,transcript)