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
|
package hocr
// TODO: consider making GetLineDetails() a function of Hocr, so could do a
// similar thing with prob format files too, and then fire them both
// off a generic interface, potentially.
// TODO: Parse line name to zero pad line numbers, so they come out in the correct order
import (
"encoding/xml"
"image"
"regexp"
"strconv"
"strings"
"git.rescribe.xyz/testingtools/parse"
)
type Hocr struct {
Lines []OcrLine `xml:"body>div>div>p>span"`
}
type OcrLine struct {
Class string `xml:"class,attr"`
Id string `xml:"id,attr"`
Title string `xml:"title,attr"`
Words []OcrWord `xml:"span"`
Text string `xml:",chardata"`
}
type OcrWord struct {
Class string `xml:"class,attr"`
Id string `xml:"id,attr"`
Title string `xml:"title,attr"`
Chars []OcrChar `xml:"span"`
Text string `xml:",chardata"`
}
type OcrChar struct {
Class string `xml:"class,attr"`
Id string `xml:"id,attr"`
Title string `xml:"title,attr"`
Chars []OcrChar `xml:"span"`
Text string `xml:",chardata"`
}
// Returns the confidence for a word based on its x_wconf value
func wordConf(s string) (float64, error) {
re, err := regexp.Compile(`x_wconf ([0-9.]+)`)
if err != nil {
return 0.0, err
}
conf := re.FindStringSubmatch(s)
return strconv.ParseFloat(conf[1], 64)
}
func boxCoords(s string) ([4]int, error) {
var coords [4]int
re, err := regexp.Compile(`bbox ([0-9]+) ([0-9]+) ([0-9]+) ([0-9]+)`)
if err != nil {
return coords, err
}
coordstr := re.FindStringSubmatch(s)
for i := range coords {
c, err := strconv.Atoi(coordstr[i+1])
if err != nil {
return coords, err
}
coords[i] = c
}
return coords, nil
}
func noText(s string) bool {
t := strings.Trim(s, " \n")
return len(t) == 0
}
func Parse(b []byte) (Hocr, error) {
var hocr Hocr
err := xml.Unmarshal(b, &hocr)
if err != nil {
return hocr, err
}
return hocr, nil
}
func GetLineDetails(h Hocr, i image.Image, name string) (parse.LineDetails, error) {
lines := make(parse.LineDetails, 0)
for _, l := range h.Lines {
totalconf := float64(0)
num := 0
for _, w := range l.Words {
c, err := wordConf(w.Title)
if err != nil {
return lines, err
}
num++
totalconf += c
}
coords, err := boxCoords(l.Title)
if err != nil {
return lines, err
}
var line parse.LineDetail
line.Name = l.Id
line.Avgconf = (totalconf/float64(num)) / 100
linetext := ""
linetext = l.Text
if(noText(linetext)) {
linetext = ""
for _, w := range l.Words {
if(w.Class != "ocrx_word") {
continue
}
linetext += w.Text + " "
}
}
if(noText(linetext)) {
linetext = ""
for _, w := range l.Words {
if(w.Class != "ocrx_word") {
continue
}
for _, c := range w.Chars {
if(c.Class != "ocrx_cinfo") {
continue
}
linetext += c.Text
}
linetext += " "
}
}
line.Text = strings.TrimRight(linetext, " ")
line.Text += "\n"
line.OcrName = name
var imgd parse.ImgDirect
imgd.Img = i.(*image.Gray).SubImage(image.Rect(coords[0], coords[1], coords[2], coords[3]))
line.Img = imgd
lines = append(lines, line)
}
return lines, nil
}
|
