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
|
// Copyright 2019 Nick White.
// Use of this source code is governed by the GPLv3
// license that can be found in the LICENSE file.
package hocr
// TODO: Parse line name to zero pad line numbers, so they can
// be sorted easily
import (
"image"
"image/draw"
_ "image/jpeg"
_ "image/png"
"io/ioutil"
"os"
"path/filepath"
"strings"
"rescribe.xyz/utils/pkg/line"
)
// LineText extracts the text from an OcrLine
func LineText(l OcrLine) (string) {
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 += " "
}
}
linetext = strings.TrimRight(linetext, " ")
return linetext
}
func parseLineDetails(h Hocr, i *image.Gray, name string) (line.Details, error) {
lines := make(line.Details, 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 ln line.Detail
ln.Name = l.Id
ln.Avgconf = (totalconf / float64(num)) / 100
ln.Text = LineText(l)
ln.OcrName = name
if i != nil {
var imgd line.ImgDirect
imgd.Img = i.SubImage(image.Rect(coords[0], coords[1], coords[2], coords[3]))
ln.Img = imgd
}
lines = append(lines, ln)
}
return lines, nil
}
// GetLineDetails parses a hocr file and returns a corresponding
// line.Details, including image extracts for each line
func GetLineDetails(hocrfn string) (line.Details, error) {
var newlines line.Details
file, err := ioutil.ReadFile(hocrfn)
if err != nil {
return newlines, err
}
h, err := Parse(file)
if err != nil {
return newlines, err
}
var img image.Image
var gray *image.Gray
pngfn := strings.Replace(hocrfn, ".hocr", ".png", 1)
pngf, err := os.Open(pngfn)
if err == nil {
defer pngf.Close()
img, _, err = image.Decode(pngf)
if err == nil {
b := img.Bounds()
gray = image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(gray, b, img, b.Min, draw.Src)
}
}
n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1)
return parseLineDetails(h, gray, n)
}
// GetLineBasics parses a hocr file and returns a corresponding
// line.Details, without any image extracts
func GetLineBasics(hocrfn string) (line.Details, error) {
var newlines line.Details
file, err := ioutil.ReadFile(hocrfn)
if err != nil {
return newlines, err
}
h, err := Parse(file)
if err != nil {
return newlines, err
}
n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1)
return parseLineDetails(h, nil, n)
}
|
