2 * LocalBlockBinarizer.h
5 * Created by Ralf Kistner on 17/10/2009.
6 * Copyright 2008 ZXing authors All rights reserved.
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
21 #ifndef LOCALBLOCKBINARIZER_H_
22 #define LOCALBLOCKBINARIZER_H_
24 #include <zxing/Binarizer.h>
25 #include <zxing/common/BitMatrix.h>
28 class LocalBlockBinarizer : public Binarizer {
30 LocalBlockBinarizer(Ref<LuminanceSource> source);
31 virtual ~LocalBlockBinarizer();
33 virtual Ref<BitMatrix> estimateBlackMatrix();
36 void calculateThresholdForBlock(const unsigned char* luminances, int subWidth, int subHeight,
37 int stride, const unsigned char* averages, const unsigned char* types, BitMatrix& matrix);
38 void sharpenRow(unsigned char* luminances, int width, int height);
39 void calculateBlackPoints(const unsigned char* luminances, unsigned char* averages, unsigned char* types, int subWidth, int subHeight, int stride);
40 void threshold8x8Block(const unsigned char* luminances, int xoffset, int yoffset, int threshold,
41 int stride, BitMatrix& matrix);
45 #endif /* LOCALBLOCKBINARIZER_H_ */