evgeny
38c9f229bc
- u_async.c: process immediate_queue BEFORE epoll_wait in uasync_poll - stcp_link.c: defensive NULL etcp_conn/etcp_link in stcp_link_close - utun_instance.c: move stcp_server_list_destroy_all to Phase J (before ETCP), add deferred drain in both Phase J and L - stcp.h/c: STCP_HS_ENC_CLIENT 6→38, STCP_HS_ENC_SERVER 7→39, exchange ed25519_pubkey in both handshake directions - etcp_connections.c: copy peer_ed25519 from STCP to ETCP_CONN in etcp_link_enter_ready_tcp; guard link->etcp in tcp_link_close_cb - chat_sync.c: fix lk->conn NULL dereference for TCP links - test_stcp.c: update stcp_server_create/stcp_client_connect callsites - tools/chat_tcp_test: change transport udp→tcp
41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
/*
|
|
* Copyright 2016 Nu-book Inc.
|
|
* Copyright 2016 ZXing authors
|
|
*/
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#pragma once
|
|
|
|
#include "GlobalHistogramBinarizer.h"
|
|
|
|
namespace ZXing {
|
|
|
|
/**
|
|
* This class implements a local thresholding algorithm, which while slower than the
|
|
* GlobalHistogramBinarizer, is fairly efficient for what it does. It is designed for
|
|
* high frequency images of barcodes with black data on white backgrounds. For this application,
|
|
* it does a much better job than a global blackpoint with severe shadows and gradients.
|
|
* However it tends to produce artifacts on lower frequency images and is therefore not
|
|
* a good general purpose binarizer for uses outside ZXing.
|
|
*
|
|
* This class extends GlobalHistogramBinarizer, using the older histogram approach for 1D readers,
|
|
* and the newer local approach for 2D readers. 1D decoding using a per-row histogram is already
|
|
* inherently local, and only fails for horizontal gradients. We can revisit that problem later,
|
|
* but for now it was not a win to use local blocks for 1D.
|
|
*
|
|
* This Binarizer is the default for the unit tests and the recommended class for library users.
|
|
*
|
|
* @author dswitkin@google.com (Daniel Switkin)
|
|
*/
|
|
class HybridBinarizer : public GlobalHistogramBinarizer
|
|
{
|
|
public:
|
|
explicit HybridBinarizer(const ImageView& iv);
|
|
~HybridBinarizer() override;
|
|
|
|
bool getPatternRow(int row, int rotation, PatternRow &res) const override;
|
|
std::shared_ptr<const BitMatrix> getBlackMatrix() const override;
|
|
};
|
|
|
|
} // ZXing
|