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
|
// (C) Copyright 2017, Google Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <allheaders.h>
#include <tesseract/baseapi.h>
#include <tesseract/resultiterator.h>
#include <string>
#include "boxread.h"
#include "rect.h"
#include "include_gunit.h"
namespace tesseract {
const char *kTruthTextWords = "To simple burn running of goods lately.\n";
const char *kTruthTextLine = "Tosimpleburnrunningofgoodslately.\n";
// The fixture for testing Tesseract.
class ApplyBoxTest : public testing::Test {
protected:
std::string TestDataNameToPath(const std::string &name) {
return file::JoinPath(TESTING_DIR, name);
}
std::string TessdataPath() {
return TESSDATA_DIR;
}
ApplyBoxTest() {
src_pix_ = nullptr;
}
~ApplyBoxTest() override {
src_pix_.destroy();
}
bool SetImage(const char *filename) {
bool found = false;
src_pix_.destroy();
src_pix_ = pixRead(TestDataNameToPath(filename).c_str());
if (api_.Init(TessdataPath().c_str(), "eng", tesseract::OEM_TESSERACT_ONLY) != -1) {
api_.SetPageSegMode(tesseract::PSM_SINGLE_BLOCK);
api_.SetImage(src_pix_);
api_.SetVariable("tessedit_make_boxes_from_boxes", "1");
api_.SetInputName(TestDataNameToPath(filename).c_str());
found = true;
}
return found;
}
// Runs ApplyBoxes (via setting the appropriate variables and Recognize)
// and checks that the output ocr text matches the truth_str, and that
// the boxes match the given box file well enough.
// If line_mode is true, ApplyBoxes is run in line segmentation mode,
// otherwise the input box file is assumed to have character-level boxes.
void VerifyBoxesAndText(const char *imagefile, const char *truth_str, const char *target_box_file,
bool line_mode) {
if (!SetImage(imagefile)) {
// eng.traineddata not found or other problem during Init.
GTEST_SKIP();
}
if (line_mode) {
api_.SetVariable("tessedit_resegment_from_line_boxes", "1");
} else {
api_.SetVariable("tessedit_resegment_from_boxes", "1");
}
api_.Recognize(nullptr);
char *ocr_text = api_.GetUTF8Text();
EXPECT_STREQ(truth_str, ocr_text);
delete[] ocr_text;
// Test the boxes by reading the target box file in parallel with the
// bounding boxes in the ocr output.
std::string box_filename = TestDataNameToPath(target_box_file);
FILE *box_file = OpenBoxFile(box_filename.c_str());
ASSERT_TRUE(box_file != nullptr);
int height = pixGetHeight(src_pix_);
ResultIterator *it = api_.GetIterator();
do {
int left, top, right, bottom;
EXPECT_TRUE(it->BoundingBox(tesseract::RIL_SYMBOL, &left, &top, &right, &bottom));
TBOX ocr_box(ICOORD(left, height - bottom), ICOORD(right, height - top));
int line_number = 0;
TBOX truth_box;
std::string box_text;
EXPECT_TRUE(ReadNextBox(0, &line_number, box_file, box_text, &truth_box));
// Testing for major overlap is a bit weak, but if they all
// major overlap successfully, then it has to be fairly close.
EXPECT_TRUE(ocr_box.major_overlap(truth_box));
// Also check that the symbol text matches the box text.
char *symbol_text = it->GetUTF8Text(tesseract::RIL_SYMBOL);
EXPECT_STREQ(box_text.c_str(), symbol_text);
delete[] symbol_text;
} while (it->Next(tesseract::RIL_SYMBOL));
delete it;
}
Image src_pix_;
std::string ocr_text_;
tesseract::TessBaseAPI api_;
};
// Tests character-level applyboxes on normal Times New Roman.
TEST_F(ApplyBoxTest, TimesCharLevel) {
VerifyBoxesAndText("trainingtimes.tif", kTruthTextWords, "trainingtimes.box", false);
}
// Tests character-level applyboxes on italic Times New Roman.
TEST_F(ApplyBoxTest, ItalicCharLevel) {
VerifyBoxesAndText("trainingital.tif", kTruthTextWords, "trainingital.box", false);
}
// Tests line-level applyboxes on normal Times New Roman.
TEST_F(ApplyBoxTest, TimesLineLevel) {
VerifyBoxesAndText("trainingtimesline.tif", kTruthTextLine, "trainingtimes.box", true);
}
// Tests line-level applyboxes on italic Times New Roman.
TEST_F(ApplyBoxTest, ItalLineLevel) {
VerifyBoxesAndText("trainingitalline.tif", kTruthTextLine, "trainingital.box", true);
}
} // namespace tesseract
|
