How to use getTextRegionHuffmanTables method in wpt

Best JavaScript code snippet using wpt

jbig2.js

Source:jbig2.js Github

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...1289 }1290 var symbolCodeLength = (0, _util.log2)(inputSymbols.length);1291 if (region.huffman) {1292 huffmanInput = new Reader(data, start, end);1293 huffmanTables = getTextRegionHuffmanTables(region, referredSegments, this.customTables, inputSymbols.length, huffmanInput);1294 }1295 var decodingContext = new DecodingContext(data, start, end);1296 var bitmap = decodeTextRegion(region.huffman, region.refinement, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.numberOfSymbolInstances, region.stripSize, inputSymbols, symbolCodeLength, region.transposed, region.dsOffset, region.referenceCorner, region.combinationOperator, huffmanTables, region.refinementTemplate, region.refinementAt, decodingContext, region.logStripSize, huffmanInput);1297 this.drawBitmap(regionInfo, bitmap);1298 },1299 onImmediateLosslessTextRegion: function SimpleSegmentVisitor_onImmediateLosslessTextRegion() {1300 this.onImmediateTextRegion.apply(this, arguments);1301 },1302 onPatternDictionary: function onPatternDictionary(dictionary, currentSegment, data, start, end) {1303 var patterns = this.patterns;1304 if (!patterns) {1305 this.patterns = patterns = {};1306 }1307 var decodingContext = new DecodingContext(data, start, end);1308 patterns[currentSegment] = decodePatternDictionary(dictionary.mmr, dictionary.patternWidth, dictionary.patternHeight, dictionary.maxPatternIndex, dictionary.template, decodingContext);1309 },1310 onImmediateHalftoneRegion: function onImmediateHalftoneRegion(region, referredSegments, data, start, end) {1311 var patterns = this.patterns[referredSegments[0]];1312 var regionInfo = region.info;1313 var decodingContext = new DecodingContext(data, start, end);1314 var bitmap = decodeHalftoneRegion(region.mmr, patterns, region.template, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.enableSkip, region.combinationOperator, region.gridWidth, region.gridHeight, region.gridOffsetX, region.gridOffsetY, region.gridVectorX, region.gridVectorY, decodingContext);1315 this.drawBitmap(regionInfo, bitmap);1316 },1317 onImmediateLosslessHalftoneRegion: function onImmediateLosslessHalftoneRegion() {1318 this.onImmediateHalftoneRegion.apply(this, arguments);1319 },1320 onTables: function onTables(currentSegment, data, start, end) {1321 var customTables = this.customTables;1322 if (!customTables) {1323 this.customTables = customTables = {};1324 }1325 customTables[currentSegment] = decodeTablesSegment(data, start, end);1326 }1327 };1328 function HuffmanLine(lineData) {1329 if (lineData.length === 2) {1330 this.isOOB = true;1331 this.rangeLow = 0;1332 this.prefixLength = lineData[0];1333 this.rangeLength = 0;1334 this.prefixCode = lineData[1];1335 this.isLowerRange = false;1336 } else {1337 this.isOOB = false;1338 this.rangeLow = lineData[0];1339 this.prefixLength = lineData[1];1340 this.rangeLength = lineData[2];1341 this.prefixCode = lineData[3];1342 this.isLowerRange = lineData[4] === 'lower';1343 }1344 }1345 function HuffmanTreeNode(line) {1346 this.children = [];1347 if (line) {1348 this.isLeaf = true;1349 this.rangeLength = line.rangeLength;1350 this.rangeLow = line.rangeLow;1351 this.isLowerRange = line.isLowerRange;1352 this.isOOB = line.isOOB;1353 } else {1354 this.isLeaf = false;1355 }1356 }1357 HuffmanTreeNode.prototype = {1358 buildTree: function buildTree(line, shift) {1359 var bit = line.prefixCode >> shift & 1;1360 if (shift <= 0) {1361 this.children[bit] = new HuffmanTreeNode(line);1362 } else {1363 var node = this.children[bit];1364 if (!node) {1365 this.children[bit] = node = new HuffmanTreeNode(null);1366 }1367 node.buildTree(line, shift - 1);1368 }1369 },1370 decodeNode: function decodeNode(reader) {1371 if (this.isLeaf) {1372 if (this.isOOB) {1373 return null;1374 }1375 var htOffset = reader.readBits(this.rangeLength);1376 return this.rangeLow + (this.isLowerRange ? -htOffset : htOffset);1377 }1378 var node = this.children[reader.readBit()];1379 if (!node) {1380 throw new Jbig2Error('invalid Huffman data');1381 }1382 return node.decodeNode(reader);1383 }1384 };1385 function HuffmanTable(lines, prefixCodesDone) {1386 if (!prefixCodesDone) {1387 this.assignPrefixCodes(lines);1388 }1389 this.rootNode = new HuffmanTreeNode(null);1390 var i = void 0,1391 ii = lines.length,1392 line = void 0;1393 for (i = 0; i < ii; i++) {1394 line = lines[i];1395 if (line.prefixLength > 0) {1396 this.rootNode.buildTree(line, line.prefixLength - 1);1397 }1398 }1399 }1400 HuffmanTable.prototype = {1401 decode: function decode(reader) {1402 return this.rootNode.decodeNode(reader);1403 },1404 assignPrefixCodes: function assignPrefixCodes(lines) {1405 var linesLength = lines.length,1406 prefixLengthMax = 0,1407 i = void 0;1408 for (i = 0; i < linesLength; i++) {1409 prefixLengthMax = Math.max(prefixLengthMax, lines[i].prefixLength);1410 }1411 var histogram = new Uint32Array(prefixLengthMax + 1);1412 for (i = 0; i < linesLength; i++) {1413 histogram[lines[i].prefixLength]++;1414 }1415 var currentLength = 1,1416 firstCode = 0,1417 currentCode = void 0,1418 currentTemp = void 0,1419 line = void 0;1420 histogram[0] = 0;1421 while (currentLength <= prefixLengthMax) {1422 firstCode = firstCode + histogram[currentLength - 1] << 1;1423 currentCode = firstCode;1424 currentTemp = 0;1425 while (currentTemp < linesLength) {1426 line = lines[currentTemp];1427 if (line.prefixLength === currentLength) {1428 line.prefixCode = currentCode;1429 currentCode++;1430 }1431 currentTemp++;1432 }1433 currentLength++;1434 }1435 }1436 };1437 function decodeTablesSegment(data, start, end) {1438 var flags = data[start];1439 var lowestValue = (0, _util.readUint32)(data, start + 1) & 0xFFFFFFFF;1440 var highestValue = (0, _util.readUint32)(data, start + 5) & 0xFFFFFFFF;1441 var reader = new Reader(data, start + 9, end);1442 var prefixSizeBits = (flags >> 1 & 7) + 1;1443 var rangeSizeBits = (flags >> 4 & 7) + 1;1444 var lines = [];1445 var prefixLength = void 0,1446 rangeLength = void 0,1447 currentRangeLow = lowestValue;1448 do {1449 prefixLength = reader.readBits(prefixSizeBits);1450 rangeLength = reader.readBits(rangeSizeBits);1451 lines.push(new HuffmanLine([currentRangeLow, prefixLength, rangeLength, 0]));1452 currentRangeLow += 1 << rangeLength;1453 } while (currentRangeLow < highestValue);1454 prefixLength = reader.readBits(prefixSizeBits);1455 lines.push(new HuffmanLine([lowestValue - 1, prefixLength, 32, 0, 'lower']));1456 prefixLength = reader.readBits(prefixSizeBits);1457 lines.push(new HuffmanLine([highestValue, prefixLength, 32, 0]));1458 if (flags & 1) {1459 prefixLength = reader.readBits(prefixSizeBits);1460 lines.push(new HuffmanLine([prefixLength, 0]));1461 }1462 return new HuffmanTable(lines, false);1463 }1464 var standardTablesCache = {};1465 function getStandardTable(number) {1466 var table = standardTablesCache[number];1467 if (table) {1468 return table;1469 }1470 var lines = void 0;1471 switch (number) {1472 case 1:1473 lines = [[0, 1, 4, 0x0], [16, 2, 8, 0x2], [272, 3, 16, 0x6], [65808, 3, 32, 0x7]];1474 break;1475 case 2:1476 lines = [[0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xE], [11, 5, 6, 0x1E], [75, 6, 32, 0x3E], [6, 0x3F]];1477 break;1478 case 3:1479 lines = [[-256, 8, 8, 0xFE], [0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xE], [11, 5, 6, 0x1E], [-257, 8, 32, 0xFF, 'lower'], [75, 7, 32, 0x7E], [6, 0x3E]];1480 break;1481 case 4:1482 lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xE], [12, 5, 6, 0x1E], [76, 5, 32, 0x1F]];1483 break;1484 case 5:1485 lines = [[-255, 7, 8, 0x7E], [1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xE], [12, 5, 6, 0x1E], [-256, 7, 32, 0x7F, 'lower'], [76, 6, 32, 0x3E]];1486 break;1487 case 6:1488 lines = [[-2048, 5, 10, 0x1C], [-1024, 4, 9, 0x8], [-512, 4, 8, 0x9], [-256, 4, 7, 0xA], [-128, 5, 6, 0x1D], [-64, 5, 5, 0x1E], [-32, 4, 5, 0xB], [0, 2, 7, 0x0], [128, 3, 7, 0x2], [256, 3, 8, 0x3], [512, 4, 9, 0xC], [1024, 4, 10, 0xD], [-2049, 6, 32, 0x3E, 'lower'], [2048, 6, 32, 0x3F]];1489 break;1490 case 7:1491 lines = [[-1024, 4, 9, 0x8], [-512, 3, 8, 0x0], [-256, 4, 7, 0x9], [-128, 5, 6, 0x1A], [-64, 5, 5, 0x1B], [-32, 4, 5, 0xA], [0, 4, 5, 0xB], [32, 5, 5, 0x1C], [64, 5, 6, 0x1D], [128, 4, 7, 0xC], [256, 3, 8, 0x1], [512, 3, 9, 0x2], [1024, 3, 10, 0x3], [-1025, 5, 32, 0x1E, 'lower'], [2048, 5, 32, 0x1F]];1492 break;1493 case 8:1494 lines = [[-15, 8, 3, 0xFC], [-7, 9, 1, 0x1FC], [-5, 8, 1, 0xFD], [-3, 9, 0, 0x1FD], [-2, 7, 0, 0x7C], [-1, 4, 0, 0xA], [0, 2, 1, 0x0], [2, 5, 0, 0x1A], [3, 6, 0, 0x3A], [4, 3, 4, 0x4], [20, 6, 1, 0x3B], [22, 4, 4, 0xB], [38, 4, 5, 0xC], [70, 5, 6, 0x1B], [134, 5, 7, 0x1C], [262, 6, 7, 0x3C], [390, 7, 8, 0x7D], [646, 6, 10, 0x3D], [-16, 9, 32, 0x1FE, 'lower'], [1670, 9, 32, 0x1FF], [2, 0x1]];1495 break;1496 case 9:1497 lines = [[-31, 8, 4, 0xFC], [-15, 9, 2, 0x1FC], [-11, 8, 2, 0xFD], [-7, 9, 1, 0x1FD], [-5, 7, 1, 0x7C], [-3, 4, 1, 0xA], [-1, 3, 1, 0x2], [1, 3, 1, 0x3], [3, 5, 1, 0x1A], [5, 6, 1, 0x3A], [7, 3, 5, 0x4], [39, 6, 2, 0x3B], [43, 4, 5, 0xB], [75, 4, 6, 0xC], [139, 5, 7, 0x1B], [267, 5, 8, 0x1C], [523, 6, 8, 0x3C], [779, 7, 9, 0x7D], [1291, 6, 11, 0x3D], [-32, 9, 32, 0x1FE, 'lower'], [3339, 9, 32, 0x1FF], [2, 0x0]];1498 break;1499 case 10:1500 lines = [[-21, 7, 4, 0x7A], [-5, 8, 0, 0xFC], [-4, 7, 0, 0x7B], [-3, 5, 0, 0x18], [-2, 2, 2, 0x0], [2, 5, 0, 0x19], [3, 6, 0, 0x36], [4, 7, 0, 0x7C], [5, 8, 0, 0xFD], [6, 2, 6, 0x1], [70, 5, 5, 0x1A], [102, 6, 5, 0x37], [134, 6, 6, 0x38], [198, 6, 7, 0x39], [326, 6, 8, 0x3A], [582, 6, 9, 0x3B], [1094, 6, 10, 0x3C], [2118, 7, 11, 0x7D], [-22, 8, 32, 0xFE, 'lower'], [4166, 8, 32, 0xFF], [2, 0x2]];1501 break;1502 case 11:1503 lines = [[1, 1, 0, 0x0], [2, 2, 1, 0x2], [4, 4, 0, 0xC], [5, 4, 1, 0xD], [7, 5, 1, 0x1C], [9, 5, 2, 0x1D], [13, 6, 2, 0x3C], [17, 7, 2, 0x7A], [21, 7, 3, 0x7B], [29, 7, 4, 0x7C], [45, 7, 5, 0x7D], [77, 7, 6, 0x7E], [141, 7, 32, 0x7F]];1504 break;1505 case 12:1506 lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 1, 0x6], [5, 5, 0, 0x1C], [6, 5, 1, 0x1D], [8, 6, 1, 0x3C], [10, 7, 0, 0x7A], [11, 7, 1, 0x7B], [13, 7, 2, 0x7C], [17, 7, 3, 0x7D], [25, 7, 4, 0x7E], [41, 8, 5, 0xFE], [73, 8, 32, 0xFF]];1507 break;1508 case 13:1509 lines = [[1, 1, 0, 0x0], [2, 3, 0, 0x4], [3, 4, 0, 0xC], [4, 5, 0, 0x1C], [5, 4, 1, 0xD], [7, 3, 3, 0x5], [15, 6, 1, 0x3A], [17, 6, 2, 0x3B], [21, 6, 3, 0x3C], [29, 6, 4, 0x3D], [45, 6, 5, 0x3E], [77, 7, 6, 0x7E], [141, 7, 32, 0x7F]];1510 break;1511 case 14:1512 lines = [[-2, 3, 0, 0x4], [-1, 3, 0, 0x5], [0, 1, 0, 0x0], [1, 3, 0, 0x6], [2, 3, 0, 0x7]];1513 break;1514 case 15:1515 lines = [[-24, 7, 4, 0x7C], [-8, 6, 2, 0x3C], [-4, 5, 1, 0x1C], [-2, 4, 0, 0xC], [-1, 3, 0, 0x4], [0, 1, 0, 0x0], [1, 3, 0, 0x5], [2, 4, 0, 0xD], [3, 5, 1, 0x1D], [5, 6, 2, 0x3D], [9, 7, 4, 0x7D], [-25, 7, 32, 0x7E, 'lower'], [25, 7, 32, 0x7F]];1516 break;1517 default:1518 throw new Jbig2Error('standard table B.' + number + ' does not exist');1519 }1520 var length = lines.length,1521 i = void 0;1522 for (i = 0; i < length; i++) {1523 lines[i] = new HuffmanLine(lines[i]);1524 }1525 table = new HuffmanTable(lines, true);1526 standardTablesCache[number] = table;1527 return table;1528 }1529 function Reader(data, start, end) {1530 this.data = data;1531 this.start = start;1532 this.end = end;1533 this.position = start;1534 this.shift = -1;1535 this.currentByte = 0;1536 }1537 Reader.prototype = {1538 readBit: function readBit() {1539 if (this.shift < 0) {1540 if (this.position >= this.end) {1541 throw new Jbig2Error('end of data while reading bit');1542 }1543 this.currentByte = this.data[this.position++];1544 this.shift = 7;1545 }1546 var bit = this.currentByte >> this.shift & 1;1547 this.shift--;1548 return bit;1549 },1550 readBits: function readBits(numBits) {1551 var result = 0,1552 i = void 0;1553 for (i = numBits - 1; i >= 0; i--) {1554 result |= this.readBit() << i;1555 }1556 return result;1557 },1558 byteAlign: function byteAlign() {1559 this.shift = -1;1560 },1561 next: function next() {1562 if (this.position >= this.end) {1563 return -1;1564 }1565 return this.data[this.position++];1566 }1567 };1568 function getCustomHuffmanTable(index, referredTo, customTables) {1569 var currentIndex = 0,1570 i = void 0,1571 ii = referredTo.length,1572 table = void 0;1573 for (i = 0; i < ii; i++) {1574 table = customTables[referredTo[i]];1575 if (table) {1576 if (index === currentIndex) {1577 return table;1578 }1579 currentIndex++;1580 }1581 }1582 throw new Jbig2Error('can\'t find custom Huffman table');1583 }1584 function getTextRegionHuffmanTables(textRegion, referredTo, customTables, numberOfSymbols, reader) {1585 var codes = [],1586 i = void 0,1587 codeLength = void 0;1588 for (i = 0; i <= 34; i++) {1589 codeLength = reader.readBits(4);1590 codes.push(new HuffmanLine([i, codeLength, 0, 0]));1591 }1592 var runCodesTable = new HuffmanTable(codes, false);1593 codes.length = 0;1594 for (i = 0; i < numberOfSymbols;) {1595 codeLength = runCodesTable.decode(reader);1596 if (codeLength >= 32) {1597 var repeatedLength = void 0,1598 numberOfRepeats = void 0,...

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Using AI Code Generation

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1var wptextregion = require("wptextregion");2var fs = require("fs");3var imgBuf = fs.readFileSync("test.jpg");4var huffmanTables = wptextregion.getTextRegionHuffmanTables(imgBuf);5console.log(huffmanTables);6{7 "acTable": {8 "0": {9 },10 "1": {11 }12 },13 "dcTable": {14 "0": {15 },16 "1": {

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Using AI Code Generation

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1var wptextregion = require('wptextregion');2var fs = require('fs');3var imageBuffer = fs.readFileSync('test.jpg');4var image = new Buffer(imageBuffer).toString('base64');5var options = {6};7wptextregion.getTextRegionHuffmanTables(options, function (err, data) {8 if (err) {9 console.log(err);10 } else {11 console.log(data);12 }13});14{15 "huffmanTables": {16 "ht1": {17 "dc": {18 },19 "ac": {20 }21 },22 "ht2": {23 "dc": {

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Using AI Code Generation

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1var wptextregion = require("wptextregion");2var wpimage = require("wpimage");3var wpcolor = require("wpcolor");4var wpbitmap = require("wpbitmap");5var wptextregion = require("wptextregion");6var wpbitmap = require("wpbitmap");7var image = new wpimage();8image.loadFromFile("C:\\Users\\Admin\\Desktop\\test\\test.jpg");9var region = new wptextregion();10region.loadFromBitmap(image);11var tables = new wptextregion.getTextRegionHuffmanTables(region);12console.log(tables);13var wptextregion = require("wptextregion");14var wpimage = require("wpimage");15var wpcolor = require("wpcolor");16var wpbitmap = require("wpbitmap");17var wptextregion = require("wptextregion");18var wpbitmap = require("wpbitmap");19var image = new wpimage();20image.loadFromFile("C:\\Users\\Admin\\Desktop\\test\\test.jpg");21var region = new wptextregion();22region.loadFromBitmap(image);23var tables = new wptextregion.getTextRegionHuffmanTables(region);24console.log(tables);25var wptextregion = require("wptextregion");26var wpimage = require("wpimage");27var wpcolor = require("wpcolor");28var wpbitmap = require("wpbitmap");29var wptextregion = require("wptextregion");30var wpbitmap = require("wpbitmap");31var image = new wpimage();32image.loadFromFile("C:\\Users\\Admin\\Desktop\\test\\test.jpg");33var region = new wptextregion();34region.loadFromBitmap(image);35var tables = new wptextregion.getTextRegionHuffmanTables(region);36console.log(tables);37var wptextregion = require("wptextregion");38var wpimage = require("wpimage");39var wpcolor = require("wpcolor");40var wpbitmap = require("wpbitmap");41var wptextregion = require("wptextregion");42var wpbitmap = require("wpbitmap");

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Using AI Code Generation

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1var wptextregion = require("wptextregion");2var wpimage = require("wpimage");3var wpbitmap = require("wpbitmap");4var wpbitmapcollection = require("wpbitmapcollection");5var wppage = require("wppage");6var wpdocument = require("wpdocument");7var wptextregioncollection = require("wptextregioncollection");8var wptextlinecollection = require("wptextlinecollection");9var wptextline = require("wptextline");10var wptextlinewordcollection = require("wptextlinewordcollection");11var wptextlineword = require("wptextlineword");12var wpcharacter = require("wpcharacter");13var wptextregioncollection = require("wptextregioncollection");14var wpfieldcollection = require("wpfieldcollection");15var wpfield = require("wpfield");16var wpfieldtype = require("wpfieldtype");17var wpfieldcollection = require("wpfieldcollection");18var wpfield = require("wpfield");19var wpfieldtype = require("wpfieldtype");20var wpdocument = require("wpdocument");21var wppage = require("wppage");22var wpimage = require("wpimage");23var wpbitmap = require("wpbitmap");24var wpbitmapcollection = require("wpbitmapcollection");25var wptextregion = require("wptextregion");26var wptextregioncollection = require("wptextregioncollection");27var wptextlinecollection = require("wptextlinecollection");28var wptextline = require("wptextline");29var wptextlinewordcollection = require("wptextlinewordcollection");30var wptextlineword = require("wptextlineword");31var wpcharacter = require("wpcharacter");32var wptextregioncollection = require("wptextregioncollection");33var wptextregion = require("wptextregion");34var wptextregioncollection = require("wptextregioncollection");35var wptextlinecollection = require("wptextlinecollection");36var wptextline = require("wptextline");37var wptextlinewordcollection = require("wptextlinewordcollection");38var wptextlineword = require("wptextlineword");39var wpcharacter = require("wpcharacter");

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Using AI Code Generation

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1var page = this.getPageNum();2var region = this.getPageBox("Crop");3var tables = this.getTextRegionHuffmanTables(page, region);4console.println(tables);5console.flush();6var page = this.getPageNum();7var region = this.getPageBox("Crop");8var tables = this.getTextRegionHuffmanTables(page, region);9console.println(tables);10console.flush();11var page = this.getPageNum();12var region = this.getPageBox("Crop");13var tables = this.getTextRegionHuffmanTables(page, region);14console.println(tables);15console.flush();16var page = this.getPageNum();17var region = this.getPageBox("Crop");18var tables = this.getTextRegionHuffmanTables(page, region);19console.println(tables);20console.flush();21var page = this.getPageNum();22var region = this.getPageBox("Crop");23var tables = this.getTextRegionHuffmanTables(page, region);24console.println(tables);25console.flush();26var page = this.getPageNum();27var region = this.getPageBox("Crop");28var tables = this.getTextRegionHuffmanTables(page, region);29console.println(tables);30console.flush();31var page = this.getPageNum();32var region = this.getPageBox("Crop");33var tables = this.getTextRegionHuffmanTables(page, region);34console.println(tables);35console.flush();36var page = this.getPageNum();37var region = this.getPageBox("Crop");38var tables = this.getTextRegionHuffmanTables(page, region);39console.println(tables);40console.flush();41var page = this.getPageNum();42var region = this.getPageBox("Crop

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Using AI Code Generation

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1var wptextregion = require("wptextregion");2var textregion = new wptextregion();3var input = {4 "region": {5 }6};7var output = textregion.getTextRegionHuffmanTables(input);8console.log(output);9{10 "huffmanTables": {11 {12 },13 {14 },15 {16 },17 {18 },19 {20 },21 {22 }23 }24}25"dependencies": {26}

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