-
Notifications
You must be signed in to change notification settings - Fork 30
/
Copy pathgcv2hocr2.py
executable file
·201 lines (186 loc) · 8.42 KB
/
gcv2hocr2.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
#!/usr/bin/env python3
import sys
import json
import argparse
from string import Template
try:
from html import escape # python 3.x
except ImportError:
from cgi import escape # python 2.x
class GCVAnnotation:
height = None
width = None
templates = {
'ocr_page': Template("""<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="$lang" lang="$lang">
<head>
<title>HOCR File</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name='ocr-system' content='gcv2hocr.py' />
<meta name='ocr-langs' content='$lang' />
<meta name='ocr-number-of-pages' content='1' />
<meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_lang'/>
</head>
<body>
<div class='ocr_page' lang='$lang' title='image "$title";bbox 0 0 $page_width $page_height'>
<div class='ocr_carea' lang='$lang' title='bbox $x0 $y0 $x1 $y1'>$content</div>
</div>
</body>
</html>
"""),
'ocr_line': Template("""
<span class='ocr_line' id='$htmlid' title='bbox $x0 $y0 $x1 $y1; baseline $baseline'>$content
</span>"""),
'ocrx_word': Template("""
<span class='ocrx_word' id='$htmlid' title='bbox $x0 $y0 $x1 $y1'>$content</span>"""),
'ocr_carea':Template("""
<div class='ocr_carea' id='$htmlid' title='bbox $x0 $y0 $x1 $y1'>$content</div>"""),
'ocr_par': Template("""
<p class='ocr_par' dir='ltr' id='$htmlid' title='bbox $x0 $y0 $x1 $y1'>$content</p>""")
}
def __init__(self,
htmlid=None,
ocr_class=None,
lang='unknown',
baseline="0 0",
page_height=None,
page_width=None,
content=None,
box=None,
title='',
savefile=False):
if content==None:
self.content = []
else:
self.content = content
self.title = title
self.htmlid = htmlid
self.baseline = baseline
self.page_height = GCVAnnotation.height if GCVAnnotation.height else page_height
self.page_width = GCVAnnotation.width if GCVAnnotation.width else page_width
self.lang = lang
self.ocr_class = ocr_class
try:
self.x0 = int(float(self.page_width*(box[0]['x'] if 'x' in box[0] and box[0]['x'] > 0 else 0)))
self.y0 = int(float(self.page_height*(box[0]['y'] if 'y' in box[0] and box[0]['y'] > 0 else 0)))
self.x1 = int(float(self.page_width*(box[2]['x'] if 'x' in box[2] and box[2]['x'] > 0 else 0)))
self.y1 = int(float(self.page_height*(box[2]['y'] if 'y' in box[2] and box[2]['y'] > 0 else 0)))
except ValueError as e:
output = 'Input JSON does not have proper boundingBox values. ' \
'This page of the PDF either must not have been ' \
'parsed correctly by GCV or the JSON is somehow corrupt.'
print(e, "\n", output)
def maximize_bbox(self):
self.x0 = min([w.x0 for w in self.content])
self.y0 = min([w.y0 for w in self.content])
self.x1 = max([w.x1 for w in self.content])
self.y1 = max([w.y1 for w in self.content])
def __repr__(self):
return "<%s [%s %s %s %s]>%s</%s>" % (self.ocr_class, self.x0, self.y0,
self.x1, self.y1, self.content,
self.ocr_class)
def render(self):
if type(self.content) == type([]):
content = "".join(map(lambda x: x.render(), self.content))
else:
content = escape(self.content)
return self.__class__.templates[self.ocr_class].substitute(self.__dict__, content=content)
def fromResponse(resp, file_name, baseline_tolerance=2, **kwargs):
# last_baseline = -100
page = None
curline = None
if isinstance(resp, bool) and not resp:
box = [{"x": 0, "y": 0}, {"x": 0, "y": 0}, {"x": 0, "y": 0}, {"x": 0, "y": 0}]
page = GCVAnnotation(
ocr_class='ocr_page',
htmlid='page_0',
box=box,
title = file_name
)
else:
for page_id, page_json in enumerate(resp['responses'][0]['fullTextAnnotation']['pages']):
box = [{"x": 0, "y": 0}, {"x": 0, "y": 0}, {"x": 0, "y": 0}, {"x": 0, "y": 0}]
GCVAnnotation.height = page_json.get('width')
GCVAnnotation.width = page_json.get('height')
page = GCVAnnotation(
ocr_class='ocr_page',
htmlid='page'+ str(page_id),
box=box,
title=file_name
)
for block_id, block_json in enumerate(page_json['blocks']):
box = block_json['boundingBox']['normalizedVertices']
block = GCVAnnotation(ocr_class='ocr_carea',htmlid="block_%d" % block_id, box=box)
page.content.append(block)
line_id = 0
for paragraph_id, paragraph_json in enumerate(block_json['paragraphs']):
box = paragraph_json['boundingBox']['normalizedVertices']
par = GCVAnnotation(ocr_class='ocr_par',htmlid="par_"+ str(block_id) + "_" + str(paragraph_id), box=box)
block.content.append(par)
curline = GCVAnnotation(ocr_class='ocr_line', htmlid="line_"+ str(block_id) + "_" + str(paragraph_id)+"_"+ str(line_id), box=box)
par.content.append(curline)
for word_id, word_json in enumerate(paragraph_json['words']):
box = word_json['boundingBox']['normalizedVertices']
word_text = ''.join([
symbol['text'] for symbol in word_json['symbols']
])
word = GCVAnnotation(ocr_class='ocrx_word', htmlid="word_"+ str(block_id) + "_" + str(paragraph_id)+"_"+ str(word_id), content=word_text, box=box)
curline.content.append(word)
for symbol_id, symbol_json in enumerate(word_json['symbols']):
if 'property' in symbol_json and 'detectedBreak' in symbol_json['property'] and 'type' in symbol_json['property']['detectedBreak']:
if symbol_json['property']['detectedBreak']['type'] == "LINE_BREAK" or symbol_json['property']['detectedBreak']['type'] == "EOL_SURE_SPACE":
line_id = line_id + 1
curline = GCVAnnotation(ocr_class='ocr_line', htmlid="line_"+ str(block_id) + "_" + str(paragraph_id)+"_"+ str(line_id), box=box)
par.content.append(curline)
return page
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('gcv_file', help='GCV JSON file, "-" for STDIN')
parser.add_argument(
"--baseline",
"-B",
help="Baseline offset",
metavar="pn pn-1 ...",
default="0 0")
parser.add_argument(
"--baseline-tolerance",
"-T",
help="Y Tolerance to recognize same line. Default: 2",
metavar="INT",
type=int,
default=2)
parser.add_argument(
"--title",
"-t",
help="Document title")
parser.add_argument(
"--lang",
"-L",
default='unknown',
help="Language")
parser.add_argument(
"--page-width",
"-W",
help="Image width. Automatically detected unless specified")
parser.add_argument(
"--page-height",
"-H",
help="Image height. Automatically detected unless specified")
parser.add_argument(
"--savefile",
help="Save to this file instead of outputting to stdout"
)
args = parser.parse_args()
instream = sys.stdin if (args.gcv_file == '-') else open(args.gcv_file, 'r', encoding='utf-8' )
resp = json.load(instream)
page = fromResponse(resp, str(args.gcv_file.rsplit('.',1)[0]), **args.__dict__)
if args.savefile:
with (open(args.savefile, 'w', encoding="utf-8")) as outfile:
outfile.write(page.render().encode('utf-8') if str == bytes else page.render())
outfile.close()
else:
if str == bytes:
print(page.render().encode('utf-8'))
else:
print(page.render())