/
TessAPI1Test.java
692 lines (636 loc) · 29.9 KB
/
TessAPI1Test.java
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
/**
* Copyright @ 2012 Quan Nguyen
*
* 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.
*/
package net.sourceforge.tess4j;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.Arrays;
import javax.imageio.ImageIO;
import com.ochafik.lang.jnaerator.runtime.NativeSize;
import com.sun.jna.NativeLong;
import com.sun.jna.Pointer;
import com.sun.jna.StringArray;
import com.sun.jna.ptr.PointerByReference;
import net.sourceforge.lept4j.Box;
import net.sourceforge.lept4j.Boxa;
import static net.sourceforge.lept4j.ILeptonica.L_CLONE;
import net.sourceforge.lept4j.Leptonica1;
import net.sourceforge.lept4j.Pix;
import net.sourceforge.lept4j.util.LeptUtils;
import net.sourceforge.tess4j.ITessAPI.*;
import net.sourceforge.tess4j.util.LoggHelper;
import net.sourceforge.tess4j.util.Utils;
import net.sourceforge.tess4j.util.ImageIOHelper;
import static net.sourceforge.tess4j.ITessAPI.FALSE;
import static net.sourceforge.tess4j.ITessAPI.TRUE;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.jupiter.api.*;
import static org.junit.jupiter.api.Assertions.*;
public class TessAPI1Test {
private static final Logger logger = LoggerFactory.getLogger(new LoggHelper().toString());
private final String datapath = "src/main/resources/tessdata";
private final String testResourcesDataPath = "src/test/resources/test-data";
String language = "eng";
String expOCRResult = "The (quick) [brown] {fox} jumps!\nOver the $43,456.78 <lazy> #90 dog";
TessBaseAPI handle;
@BeforeAll
public static void setUpClass() throws Exception {
}
@AfterAll
public static void tearDownClass() throws Exception {
}
@BeforeEach
public void setUp() {
handle = TessAPI1.TessBaseAPICreate();
}
@AfterEach
public void tearDown() {
TessAPI1.TessBaseAPIDelete(handle);
}
/**
* Test of TessBaseAPIRect method, of class TessAPI1.
*
* @throws Exception while processing the image
*/
@Test
public void testTessBaseAPIRect() throws Exception {
logger.info("TessBaseAPIRect");
String expResult = expOCRResult;
File tiff = new File(this.testResourcesDataPath, "eurotext.tif");
BufferedImage image = ImageIO.read(tiff); // require jai-imageio lib to read TIFF
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
Pointer utf8Text = TessAPI1.TessBaseAPIRect(handle, buf, bytespp, bytespl, 0, 0, image.getWidth(), image.getHeight());
String result = utf8Text.getString(0);
TessAPI1.TessDeleteText(utf8Text);
logger.info(result);
assertEquals(expResult, result.substring(0, expResult.length()));
}
/**
* Test of TessBaseAPIGetUTF8Text method, of class TessAPI1.
*
* @throws Exception while processing the image
*/
@Test
public void testTessBaseAPIGetUTF8Text() throws Exception {
logger.info("TessBaseAPIGetUTF8Text");
String expResult = expOCRResult;
File tiff = new File(this.testResourcesDataPath, "eurotext.tif");
BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
TessAPI1.TessBaseAPISetRectangle(handle, 0, 0, 1024, 800);
Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
String result = utf8Text.getString(0);
TessAPI1.TessDeleteText(utf8Text);
logger.info(result);
assertTrue(result.startsWith(expResult));
}
/**
* Test of TessBaseAPIGetUTF8Text method, of class TessAPI1.
*
* @throws java.lang.Exception
*/
@Test
public void testTessBaseAPIGetUTF8Text_Pix() throws Exception {
logger.info("TessBaseAPIGetUTF8Text_Pix");
String expResult = expOCRResult;
File tiff = new File(this.testResourcesDataPath, "eurotext.tif");
Pix pix = Leptonica1.pixRead(tiff.getPath());
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage2(handle, pix);
Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
String result = utf8Text.getString(0);
TessAPI1.TessDeleteText(utf8Text);
logger.info(result);
//release Pix resource
PointerByReference pRef = new PointerByReference();
pRef.setValue(pix.getPointer());
Leptonica1.pixDestroy(pRef);
assertTrue(result.startsWith(expResult));
}
/**
* Test of TessBaseAPIGetComponentImages method, of class TessAPI1.
*
* @throws java.lang.Exception
*/
@Test
public void testTessBaseAPIGetComponentImages() throws Exception {
logger.info("TessBaseAPIGetComponentImages");
File image = new File(this.testResourcesDataPath, "eurotext.png");
int expResult = 12; // number of lines in the test image
Pix pix = Leptonica1.pixRead(image.getPath());
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage2(handle, pix);
PointerByReference pixa = null;
PointerByReference blockids = null;
Boxa boxes = TessAPI1.TessBaseAPIGetComponentImages(handle, TessPageIteratorLevel.RIL_TEXTLINE, TRUE, pixa, blockids);
// boxes = TessAPI1.TessBaseAPIGetRegions(handle, pixa); // equivalent to TessPageIteratorLevel.RIL_BLOCK
int boxCount = Leptonica1.boxaGetCount(boxes);
for (int i = 0; i < boxCount; i++) {
Box box = Leptonica1.boxaGetBox(boxes, i, L_CLONE);
if (box == null) {
continue;
}
TessAPI1.TessBaseAPISetRectangle(handle, box.x, box.y, box.w, box.h);
Pointer utf8Text = TessAPI1.TessBaseAPIGetUTF8Text(handle);
String ocrResult = utf8Text.getString(0);
TessAPI1.TessDeleteText(utf8Text);
int conf = TessAPI1.TessBaseAPIMeanTextConf(handle);
System.out.print(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d, confidence: %d, text: %s", i, box.x, box.y, box.w, box.h, conf, ocrResult));
LeptUtils.dispose(box);
}
// release Pix and Boxa resources
LeptUtils.dispose(pix);
LeptUtils.dispose(boxes);
assertEquals(expResult, boxCount);
}
/**
* Test of TessVersion method, of class TessAPI1.
*/
@Test
public void testTessVersion() {
logger.info("TessVersion");
String expResult = "5.3.4";
String result = TessAPI1.TessVersion();
logger.info(result);
assertTrue(result.startsWith(expResult));
}
/**
* Test of TessBaseAPISetVariable method, of class TessAPI1.
*/
@Test
public void testTessBaseAPISetVariable() {
logger.info("TessBaseAPISetVariable");
String name = "tessedit_create_hocr";
String value = "1";
int expResult = 1;
int result = TessAPI1.TessBaseAPISetVariable(handle, name, value);
assertEquals(expResult, result);
}
/**
* Test of TessBaseAPIGetBoolVariable method, of class TessAPI1.
*/
@Test
public void testTessBaseAPIGetBoolVariable() {
logger.info("TessBaseAPIGetBoolVariable");
String name = "tessedit_create_hocr";
TessAPI1.TessBaseAPISetVariable(handle, name, "1");
IntBuffer value = IntBuffer.allocate(1);
int result = -1;
if (TessAPI1.TessBaseAPIGetBoolVariable(handle, "tessedit_create_hocr", value) == TRUE) {
result = value.get(0);
}
int expResult = 1;
assertEquals(expResult, result);
}
/**
* Test of TessBaseAPIPrintVariables method, of class TessAPI1.
*
* @throws Exception while persisting variables into a file.
*/
@Test
public void testTessBaseAPIPrintVariablesToFile() throws Exception {
logger.info("TessBaseAPIPrintVariablesToFile");
String var = "tessedit_char_whitelist";
String value = "0123456789";
TessAPI1.TessBaseAPISetVariable(handle, var, value);
String filename = "printvar.txt";
TessAPI1.TessBaseAPIPrintVariablesToFile(handle, filename); // will crash if not invoked after some method
File file = new File(filename);
BufferedReader input = new BufferedReader(new FileReader(file));
StringBuilder strB = new StringBuilder();
String line;
String EOL = System.getProperty("line.separator");
while ((line = input.readLine()) != null) {
strB.append(line).append(EOL);
}
input.close();
file.delete();
assertTrue(strB.toString().contains(var + "\t" + value));
}
/**
* Test of TessBaseAPIInit4 method, of class TessAPI1.
*/
@Test
public void testTessBaseAPIInit4() {
logger.info("TessBaseAPIInit4");
int oem = TessOcrEngineMode.OEM_DEFAULT;
PointerByReference configs = null;
int configs_size = 0;
// disable loading dictionaries
String[] args = new String[]{"load_system_dawg", "load_freq_dawg"};
StringArray sarray = new StringArray(args);
PointerByReference vars_vec = new PointerByReference();
vars_vec.setPointer(sarray);
args = new String[]{"F", "F"};
sarray = new StringArray(args);
PointerByReference vars_values = new PointerByReference();
vars_values.setPointer(sarray);
NativeSize vars_vec_size = new NativeSize(args.length);
int expResult = 0;
int result = TessAPI1.TessBaseAPIInit4(handle, datapath, language, oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, FALSE);
assertEquals(expResult, result);
}
/**
* Test of TessBaseAPIGetInitLanguagesAsString method, of class TessAPI1.
*/
@Test
public void testTessBaseAPIGetInitLanguagesAsString() {
logger.info("TessBaseAPIGetInitLanguagesAsString");
String expResult = "";
String result = TessAPI1.TessBaseAPIGetInitLanguagesAsString(handle);
assertEquals(expResult, result);
}
/**
* Test of TessBaseAPIGetLoadedLanguagesAsVector method, of class TessAPI1.
*/
@Test
public void testTessBaseAPIGetLoadedLanguagesAsVector() {
logger.info("TessBaseAPIGetLoadedLanguagesAsVector");
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
String[] expResult = {"eng"};
String[] result = TessAPI1.TessBaseAPIGetLoadedLanguagesAsVector(handle).getPointer().getStringArray(0);
assertArrayEquals(expResult, result);
}
/**
* Test of TessBaseAPIGetAvailableLanguagesAsVector method, of class
* TessAPI1.
*/
@Test
public void testTessBaseAPIGetAvailableLanguagesAsVector() {
logger.info("TessBaseAPIGetAvailableLanguagesAsVector");
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
String[] expResult = {"eng"};
String[] result = TessAPI1.TessBaseAPIGetAvailableLanguagesAsVector(handle).getPointer().getStringArray(0);
assertTrue(Arrays.asList(result).containsAll(Arrays.asList(expResult)));
}
/**
* Test of TessBaseAPIGetHOCRText method, of class TessAPI1.
*
* @throws Exception while getting ocr text from image.
*/
@Test
public void testTessBaseAPIGetHOCRText() throws Exception {
logger.info("TessBaseAPIGetHOCRText");
File tiff = new File(this.testResourcesDataPath, "eurotext.tif");
BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
int page_number = 0;
Pointer utf8Text = TessAPI1.TessBaseAPIGetHOCRText(handle, page_number);
String result = utf8Text.getString(0);
TessAPI1.TessDeleteText(utf8Text);
assertTrue(result.contains("<div class='ocr_page'"));
}
/**
* Test of TessBaseAPIGetAltoText method, of class TessAPI.
*
* @throws Exception while getting Alto text
*/
@Test
public void testTessBaseAPIGetAltoText() throws Exception {
logger.info("TessBaseAPIGetAltoText");
String filename = String.format("%s/%s", this.testResourcesDataPath, "eurotext.tif");
File tiff = new File(filename);
BufferedImage image = ImageIO.read(new FileInputStream(tiff));
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
int page_number = 0;
Pointer textPtr = TessAPI1.TessBaseAPIGetAltoText(handle, page_number);
String result = textPtr.getString(0);
TessAPI1.TessDeleteText(textPtr);
assertTrue(result.contains("<Page WIDTH=\"1024\" HEIGHT=\"800\" PHYSICAL_IMG_NR=\"0\" ID=\"page_0\">"));
// WordStr Box output
textPtr = TessAPI1.TessBaseAPIGetWordStrBoxText(handle, page_number);
result = textPtr.getString(0);
TessAPI1.TessDeleteText(textPtr);
assertTrue(result.contains("WordStr"));
// TSV output
textPtr = TessAPI1.TessBaseAPIGetTsvText(handle, page_number);
result = textPtr.getString(0);
TessAPI1.TessDeleteText(textPtr);
assertTrue(result.contains("1\t"));
// LSTM Box output
textPtr = TessAPI1.TessBaseAPIGetLSTMBoxText(handle, page_number);
result = textPtr.getString(0);
TessAPI1.TessDeleteText(textPtr);
assertTrue(result.contains("\t"));
}
/**
* Test of TessBaseAPIAnalyseLayout method, of class TessAPI1.
*
* @throws java.lang.Exception
*/
@Test
public void testTessBaseAPIAnalyseLayout() throws Exception {
logger.info("TessBaseAPIAnalyseLayout");
File image = new File(testResourcesDataPath, "eurotext.png");
int expResult = 12; // number of lines in the test image
Pix pix = Leptonica1.pixRead(image.getPath());
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage2(handle, pix);
int pageIteratorLevel = TessPageIteratorLevel.RIL_TEXTLINE;
logger.info("PageIteratorLevel: " + Utils.getConstantName(pageIteratorLevel, TessPageIteratorLevel.class));
int i = 0;
TessPageIterator pi = TessAPI1.TessBaseAPIAnalyseLayout(handle);
do {
IntBuffer leftB = IntBuffer.allocate(1);
IntBuffer topB = IntBuffer.allocate(1);
IntBuffer rightB = IntBuffer.allocate(1);
IntBuffer bottomB = IntBuffer.allocate(1);
TessAPI1.TessPageIteratorBoundingBox(pi, pageIteratorLevel, leftB, topB, rightB, bottomB);
int left = leftB.get();
int top = topB.get();
int right = rightB.get();
int bottom = bottomB.get();
logger.info(String.format("Box[%d]: x=%d, y=%d, w=%d, h=%d", i++, left, top, right - left, bottom - top));
} while (TessAPI1.TessPageIteratorNext(pi, pageIteratorLevel) == TRUE);
TessAPI1.TessPageIteratorDelete(pi);
PointerByReference pRef = new PointerByReference();
pRef.setValue(pix.getPointer());
Leptonica1.pixDestroy(pRef);
assertEquals(expResult, i);
}
/**
* Test of TessBaseAPIDetectOrientationScript method, of class TessAPI1.
*
* @throws java.lang.Exception
*/
@Test
public void testTessBaseAPIDetectOrientationScript() throws Exception {
logger.info("TessBaseAPIDetectOrientationScript");
File image = new File(testResourcesDataPath, "eurotext90.png");
int expResult = TRUE;
Pix pix = Leptonica1.pixRead(image.getPath());
TessAPI1.TessBaseAPIInit3(handle, datapath, "osd");
TessAPI1.TessBaseAPISetImage2(handle, pix);
IntBuffer orient_degB = IntBuffer.allocate(1);
FloatBuffer orient_confB = FloatBuffer.allocate(1);
PointerByReference script_nameB = new PointerByReference();
FloatBuffer script_confB = FloatBuffer.allocate(1);
int result = TessAPI1.TessBaseAPIDetectOrientationScript(handle, orient_degB, orient_confB, script_nameB, script_confB);
if (result == TRUE) {
int orient_deg = orient_degB.get();
float orient_conf = orient_confB.get();
String script_name = script_nameB.getValue().getString(0);
float script_conf = script_confB.get();
logger.info(String.format("OrientationScript: orient_deg=%d, orient_conf=%f, script_name=%s, script_conf=%f", orient_deg, orient_conf, script_name, script_conf));
}
PointerByReference pRef = new PointerByReference();
pRef.setValue(pix.getPointer());
Leptonica1.pixDestroy(pRef);
assertEquals(expResult, result);
}
/**
* Test of Orientation and script detection (OSD).
*
* @throws Exception while processing the image.
*/
@Test
public void testOSD() throws Exception {
logger.info("OSD");
int expResult = TessPageSegMode.PSM_AUTO_OSD;
IntBuffer orientation = IntBuffer.allocate(1);
IntBuffer direction = IntBuffer.allocate(1);
IntBuffer order = IntBuffer.allocate(1);
FloatBuffer deskew_angle = FloatBuffer.allocate(1);
File imageFile = new File(this.testResourcesDataPath, "eurotext90.png");
BufferedImage image = ImageIO.read(new FileInputStream(imageFile));
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetPageSegMode(handle, expResult);
int actualResult = TessAPI1.TessBaseAPIGetPageSegMode(handle);
logger.info("PSM: " + Utils.getConstantName(actualResult, TessPageSegMode.class));
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
int success = TessAPI1.TessBaseAPIRecognize(handle, null);
if (success == 0) {
TessAPI1.TessPageIterator pi = TessAPI1.TessBaseAPIAnalyseLayout(handle);
TessAPI1.TessPageIteratorOrientation(pi, orientation, direction, order, deskew_angle);
logger.info(String.format(
"Orientation: %s\nWritingDirection: %s\nTextlineOrder: %s\nDeskew angle: %.4f\n",
Utils.getConstantName(orientation.get(), TessOrientation.class),
Utils.getConstantName(direction.get(), TessWritingDirection.class),
Utils.getConstantName(order.get(), TessTextlineOrder.class),
deskew_angle.get()));
}
assertEquals(expResult, actualResult);
}
/**
* Test of ResultIterator and PageIterator.
*
* @throws Exception
*/
@Test
public void testResultIterator() throws Exception {
logger.info("TessBaseAPIGetIterator");
File tiff = new File(this.testResourcesDataPath, "eurotext.tif");
BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetPageSegMode(handle, TessPageSegMode.PSM_AUTO);
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
ETEXT_DESC monitor = new ETEXT_DESC();
ITessAPI.TimeVal timeout = new ITessAPI.TimeVal();
timeout.tv_sec = new NativeLong(0L); // time > 0 causes blank output
monitor.end_time = timeout;
ProgressMonitor pmo = new ProgressMonitor(monitor);
pmo.start();
TessAPI1.TessBaseAPIRecognize(handle, monitor);
logger.info("Message: " + pmo.getMessage());
TessResultIterator ri = TessAPI1.TessBaseAPIGetIterator(handle);
TessPageIterator pi = TessAPI1.TessResultIteratorGetPageIterator(ri);
TessAPI1.TessPageIteratorBegin(pi);
logger.info("Bounding boxes:\nchar(s) left top right bottom confidence font-attributes");
int level = TessPageIteratorLevel.RIL_WORD;
// int height = image.getHeight();
do {
Pointer ptr = TessAPI1.TessResultIteratorGetUTF8Text(ri, level);
String word = ptr.getString(0);
TessAPI1.TessDeleteText(ptr);
float confidence = TessAPI1.TessResultIteratorConfidence(ri, level);
IntBuffer leftB = IntBuffer.allocate(1);
IntBuffer topB = IntBuffer.allocate(1);
IntBuffer rightB = IntBuffer.allocate(1);
IntBuffer bottomB = IntBuffer.allocate(1);
TessAPI1.TessPageIteratorBoundingBox(pi, level, leftB, topB, rightB, bottomB);
int left = leftB.get();
int top = topB.get();
int right = rightB.get();
int bottom = bottomB.get();
System.out.print(String.format("%s %d %d %d %d %f", word, left, top, right, bottom, confidence));
// logger.info(String.format("%s %d %d %d %d", str, left, height - bottom, right, height - top)); //
// training box coordinates
IntBuffer boldB = IntBuffer.allocate(1);
IntBuffer italicB = IntBuffer.allocate(1);
IntBuffer underlinedB = IntBuffer.allocate(1);
IntBuffer monospaceB = IntBuffer.allocate(1);
IntBuffer serifB = IntBuffer.allocate(1);
IntBuffer smallcapsB = IntBuffer.allocate(1);
IntBuffer pointSizeB = IntBuffer.allocate(1);
IntBuffer fontIdB = IntBuffer.allocate(1);
String fontName = TessAPI1.TessResultIteratorWordFontAttributes(ri, boldB, italicB, underlinedB,
monospaceB, serifB, smallcapsB, pointSizeB, fontIdB);
boolean bold = boldB.get() == TRUE;
boolean italic = italicB.get() == TRUE;
boolean underlined = underlinedB.get() == TRUE;
boolean monospace = monospaceB.get() == TRUE;
boolean serif = serifB.get() == TRUE;
boolean smallcaps = smallcapsB.get() == TRUE;
int pointSize = pointSizeB.get();
int fontId = fontIdB.get();
logger.info(String.format(" font: %s, size: %d, font id: %d, bold: %b,"
+ " italic: %b, underlined: %b, monospace: %b, serif: %b, smallcap: %b", fontName, pointSize,
fontId, bold, italic, underlined, monospace, serif, smallcaps));
} while (TessAPI1.TessPageIteratorNext(pi, level) == TRUE);
// TessAPI1.TessPageIteratorDelete(pi);
TessAPI1.TessResultIteratorDelete(ri);
assertTrue(true);
}
/**
* Test of ChoiceIterator.
*
* @throws Exception
*/
@Test
public void testChoiceIterator() throws Exception {
logger.info("TessResultIteratorGetChoiceIterator");
String filename = String.format("%s/%s", this.testResourcesDataPath, "eurotext.tif");
File tiff = new File(filename);
BufferedImage image = ImageIO.read(new FileInputStream(tiff)); // require jai-imageio lib to read TIFF
ByteBuffer buf = ImageIOHelper.convertImageData(image);
int bpp = image.getColorModel().getPixelSize();
int bytespp = bpp / 8;
int bytespl = (int) Math.ceil(image.getWidth() * bpp / 8.0);
TessAPI1.TessBaseAPIInit3(handle, datapath, language);
TessAPI1.TessBaseAPISetImage(handle, buf, image.getWidth(), image.getHeight(), bytespp, bytespl);
TessAPI1.TessBaseAPISetVariable(handle, "save_blob_choices", "T");
TessAPI1.TessBaseAPISetRectangle(handle, 37, 228, 548, 31);
ETEXT_DESC monitor = new ETEXT_DESC();
ProgressMonitor pmo = new ProgressMonitor(monitor);
pmo.start();
TessAPI1.TessBaseAPIRecognize(handle, monitor);
logger.info("Message: " + pmo.getMessage());
TessResultIterator ri = TessAPI1.TessBaseAPIGetIterator(handle);
int level = TessPageIteratorLevel.RIL_SYMBOL;
if (ri != null) {
do {
Pointer symbol = TessAPI1.TessResultIteratorGetUTF8Text(ri, level);
float conf = TessAPI1.TessResultIteratorConfidence(ri, level);
if (symbol != null) {
logger.info(String.format("symbol %s, conf: %f", symbol.getString(0), conf));
boolean indent = false;
TessChoiceIterator ci = TessAPI1.TessResultIteratorGetChoiceIterator(ri);
do {
if (indent) {
System.out.print("\t");
}
System.out.print("\t- ");
String choice = TessAPI1.TessChoiceIteratorGetUTF8Text(ci);
logger.info(String.format("%s conf: %f", choice, TessAPI1.TessChoiceIteratorConfidence(ci)));
indent = true;
} while (TessAPI1.TessChoiceIteratorNext(ci) == TessAPI1.TRUE);
TessAPI1.TessChoiceIteratorDelete(ci);
}
logger.info("---------------------------------------------");
TessAPI1.TessDeleteText(symbol);
} while (TessAPI1.TessResultIteratorNext(ri, level) == TessAPI1.TRUE);
TessAPI1.TessResultIteratorDelete(ri);
}
assertTrue(true);
}
/**
* Test of ResultRenderer method, of class TessAPI1.
*
* @throws java.lang.Exception
*/
@Test
public void testResultRenderer() throws Exception {
logger.info("TessResultRenderer");
String image = String.format("%s/%s", this.testResourcesDataPath, "eurotext.tif");
String output = "capi-test.txt";
int set_only_init_params = ITessAPI.FALSE;
int oem = TessOcrEngineMode.OEM_DEFAULT;
PointerByReference configs = null;
int configs_size = 0;
String[] params = {"load_system_dawg", "tessedit_char_whitelist"};
String vals[] = {"F", ""}; //0123456789-.IThisalotfpnex
PointerByReference vars_vec = new PointerByReference();
vars_vec.setPointer(new StringArray(params));
PointerByReference vars_values = new PointerByReference();
vars_values.setPointer(new StringArray(vals));
NativeSize vars_vec_size = new NativeSize(params.length);
TessAPI1.TessBaseAPISetOutputName(handle, output);
int rc = TessAPI1.TessBaseAPIInit4(handle, datapath, language,
oem, configs, configs_size, vars_vec, vars_values, vars_vec_size, set_only_init_params);
if (rc != 0) {
TessAPI1.TessBaseAPIDelete(handle);
logger.error("Could not initialize tesseract.");
return;
}
String outputbase = "target/test-classes/test-results/ResultRenderer1";
TessResultRenderer renderer = TessAPI1.TessHOcrRendererCreate(outputbase);
TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessBoxTextRendererCreate(outputbase));
TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessTextRendererCreate(outputbase));
String dataPath = TessAPI1.TessBaseAPIGetDatapath(handle);
TessAPI1.TessResultRendererInsert(renderer, TessAPI1.TessPDFRendererCreate(outputbase, dataPath, FALSE));
int result = TessAPI1.TessBaseAPIProcessPages(handle, image, null, 0, renderer);
// if (result == FALSE) {
// logger.error("Error during processing.");
// return;
// }
while ((renderer = TessAPI1.TessResultRendererNext(renderer)) != null) {
String ext = TessAPI1.TessResultRendererExtention(renderer).getString(0);
logger.info(String.format("TessResultRendererExtention: %s\nTessResultRendererTitle: %s\nTessResultRendererImageNum: %d",
ext,
TessAPI1.TessResultRendererTitle(renderer).getString(0),
TessAPI1.TessResultRendererImageNum(renderer)));
}
TessAPI1.TessDeleteResultRenderer(renderer);
assertTrue(new File(outputbase + ".pdf").exists());
}
}