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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
// Copyright (c) 2020-2021 darkliang wangberlinT Certseeds
#ifndef OPENCV_BARCODE_UPCEAN_DECODER_HPP
#define OPENCV_BARCODE_UPCEAN_DECODER_HPP
#include "abs_decoder.hpp"
/**
* upcean_decoder the abstract basic class for decode formats,
* it will have ean13/8,upc_a,upc_e , etc.. class extend this class
*/
namespace cv {
namespace barcode {
using std::string;
using std::vector;
class UPCEANDecoder : public AbsDecoder
{
public:
~UPCEANDecoder() override = default;
std::pair<Result, float> decodeROI(const Mat &bar_img) const override;
protected:
static int decodeDigit(const std::vector<uchar> &row, Counter &counters, uint rowOffset,
const std::vector<std::vector<int>> &patterns);
static bool
findGuardPatterns(const std::vector<uchar> &row, uint rowOffset, uchar whiteFirst, const std::vector<int> &pattern,
Counter &counter, std::pair<uint, uint> &result);
static bool findStartGuardPatterns(const std::vector<uchar> &row, std::pair<uint, uint> &start_range);
Result decodeLine(const vector<uchar> &line) const;
Result decode(const vector<uchar> &bar) const override = 0;
bool isValid(const string &result) const override;
private:
#if 0
void drawDebugLine(Mat &debug_img, const Point2i &begin, const Point2i &end) const;
#endif
};
const std::vector<std::vector<int>> &get_A_or_C_Patterns();
const std::vector<std::vector<int>> &get_AB_Patterns();
const std::vector<int> &BEGIN_PATTERN();
const std::vector<int> &MIDDLE_PATTERN();
const std::array<char, 32> &FIRST_CHAR_ARRAY();
constexpr static uint PATTERN_LENGTH = 4;
constexpr static uint MAX_AVG_VARIANCE = static_cast<uint>(PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.48f);
constexpr static uint MAX_INDIVIDUAL_VARIANCE = static_cast<uint>(PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.7f);
}
} // namespace cv
#endif // OPENCV_BARCODE_UPCEAN_DECODER_HPP
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