@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
82 lines (81 loc) • 2.95 kB
JavaScript
/*
* Copyright 2013 ZXing authors
*
* 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 com.google.zxing.pdf417.decoder;
// import java.util.Formatter;
import Formatter from '../../util/Formatter';
import BoundingBox from './BoundingBox';
/**
* @author Guenther Grau
*/
export default class DetectionResultColumn {
constructor(boundingBox) {
this.boundingBox = new BoundingBox(boundingBox);
// this.codewords = new Codeword[boundingBox.getMaxY() - boundingBox.getMinY() + 1];
this.codewords = new Array(boundingBox.getMaxY() - boundingBox.getMinY() + 1);
}
/*final*/ getCodewordNearby(imageRow) {
let codeword = this.getCodeword(imageRow);
if (codeword != null) {
return codeword;
}
for (let i = 1; i < DetectionResultColumn.MAX_NEARBY_DISTANCE; i++) {
let nearImageRow = this.imageRowToCodewordIndex(imageRow) - i;
if (nearImageRow >= 0) {
codeword = this.codewords[nearImageRow];
if (codeword != null) {
return codeword;
}
}
nearImageRow = this.imageRowToCodewordIndex(imageRow) + i;
if (nearImageRow < this.codewords.length) {
codeword = this.codewords[nearImageRow];
if (codeword != null) {
return codeword;
}
}
}
return null;
}
/*final int*/ imageRowToCodewordIndex(imageRow) {
return imageRow - this.boundingBox.getMinY();
}
/*final void*/ setCodeword(imageRow, codeword) {
this.codewords[this.imageRowToCodewordIndex(imageRow)] = codeword;
}
/*final*/ getCodeword(imageRow) {
return this.codewords[this.imageRowToCodewordIndex(imageRow)];
}
/*final*/ getBoundingBox() {
return this.boundingBox;
}
/*final*/ getCodewords() {
return this.codewords;
}
// @Override
toString() {
const formatter = new Formatter();
let row = 0;
for (const codeword of this.codewords) {
if (codeword == null) {
formatter.format('%3d: | %n', row++);
continue;
}
formatter.format('%3d: %3d|%3d%n', row++, codeword.getRowNumber(), codeword.getValue());
}
return formatter.toString();
}
}
DetectionResultColumn.MAX_NEARBY_DISTANCE = 5;