Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zxing-cpp/example/ZXingOpenCV.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright 2020 Axel Waggershauser
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3 */
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4 // SPDX-License-Identifier: Apache-2.0
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6 #pragma once
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8 #include "ReadBarcode.h"
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10 #include <opencv2/opencv.hpp>
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12 inline ZXing::ImageView ImageViewFromMat(const cv::Mat& image)
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13 {
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14 using ZXing::ImageFormat;
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16 auto fmt = ImageFormat::None;
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17 switch (image.channels()) {
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18 case 1: fmt = ImageFormat::Lum; break;
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19 case 2: fmt = ImageFormat::LumA; break;
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20 case 3: fmt = ImageFormat::BGR; break;
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21 case 4: fmt = ImageFormat::BGRA; break;
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22 }
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24 if (image.depth() != CV_8U || fmt == ImageFormat::None)
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25 return {nullptr, 0, 0, ImageFormat::None};
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27 return {image.data, image.cols, image.rows, fmt};
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28 }
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30 inline ZXing::Barcodes ReadBarcodes(const cv::Mat& image, const ZXing::ReaderOptions& options = {})
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31 {
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32 return ZXing::ReadBarcodes(ImageViewFromMat(image), options);
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33 }
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35 inline void DrawBarcode(cv::Mat& img, ZXing::Barcode barcode)
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36 {
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37 auto pos = barcode.position();
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38 auto zx2cv = [](ZXing::PointI p) { return cv::Point(p.x, p.y); };
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39 auto contour = std::vector<cv::Point>{zx2cv(pos[0]), zx2cv(pos[1]), zx2cv(pos[2]), zx2cv(pos[3])};
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40 const auto* pts = contour.data();
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41 int npts = contour.size();
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43 cv::polylines(img, &pts, &npts, 1, true, CV_RGB(0, 255, 0));
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44 cv::putText(img, barcode.text(), zx2cv(pos[3]) + cv::Point(0, 20), cv::FONT_HERSHEY_DUPLEX, 0.5, CV_RGB(0, 255, 0));
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45 }