35 lines
966 B
C
35 lines
966 B
C
|
/*
|
||
|
|
* Copyright 2016 Nu-book Inc.
|
||
|
|
* Copyright 2016 ZXing authors
|
||
|
|
*/
|
||
|
|
// SPDX-License-Identifier: Apache-2.0
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "BinaryBitmap.h"
|
||
|
|
|
||
|
|
namespace ZXing {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This Binarizer implementation uses the old ZXing global histogram approach. It is suitable
|
||
|
|
* for low-end mobile devices which don't have enough CPU or memory to use a local thresholding
|
||
|
|
* algorithm. However, because it picks a global black point, it cannot handle difficult shadows
|
||
|
|
* and gradients.
|
||
|
|
*
|
||
|
|
* Faster mobile devices and all desktop applications should probably use HybridBinarizer instead.
|
||
|
|
*
|
||
|
|
* @author dswitkin@google.com (Daniel Switkin)
|
||
|
|
* @author Sean Owen
|
||
|
|
*/
|
||
|
|
class GlobalHistogramBinarizer : public BinaryBitmap
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
explicit GlobalHistogramBinarizer(const ImageView& buffer);
|
||
|
|
~GlobalHistogramBinarizer() override;
|
||
|
|
|
||
|
|
bool getPatternRow(int row, int rotation, PatternRow &res) const override;
|
||
|
|
std::shared_ptr<const BitMatrix> getBlackMatrix() const override;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // ZXing
|