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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 // Original code is licensed as follows: | 6 // Original code is licensed as follows: |
7 /* | 7 /* |
8 * Copyright 2009 ZXing authors | 8 * Copyright 2009 ZXing authors |
9 * | 9 * |
10 * Licensed under the Apache License, Version 2.0 (the "License"); | 10 * Licensed under the Apache License, Version 2.0 (the "License"); |
11 * you may not use this file except in compliance with the License. | 11 * you may not use this file except in compliance with the License. |
12 * You may obtain a copy of the License at | 12 * You may obtain a copy of the License at |
13 * | 13 * |
14 * http://www.apache.org/licenses/LICENSE-2.0 | 14 * http://www.apache.org/licenses/LICENSE-2.0 |
15 * | 15 * |
16 * Unless required by applicable law or agreed to in writing, software | 16 * Unless required by applicable law or agreed to in writing, software |
17 * distributed under the License is distributed on an "AS IS" BASIS, | 17 * distributed under the License is distributed on an "AS IS" BASIS, |
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
19 * See the License for the specific language governing permissions and | 19 * See the License for the specific language governing permissions and |
20 * limitations under the License. | 20 * limitations under the License. |
21 */ | 21 */ |
22 | 22 |
23 #include "xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.h" | 23 #include "xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h" |
24 | 24 |
25 #include <memory> | 25 #include <memory> |
26 | 26 |
27 #include "xfa/src/fxbarcode/BC_Binarizer.h" | 27 #include "xfa/fxbarcode/BC_Binarizer.h" |
28 #include "xfa/src/fxbarcode/BC_LuminanceSource.h" | 28 #include "xfa/fxbarcode/BC_LuminanceSource.h" |
29 #include "xfa/src/fxbarcode/common/BC_CommonBitArray.h" | 29 #include "xfa/fxbarcode/common/BC_CommonBitArray.h" |
30 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h" | 30 #include "xfa/fxbarcode/common/BC_CommonBitMatrix.h" |
31 #include "xfa/src/fxbarcode/utils.h" | 31 #include "xfa/fxbarcode/utils.h" |
32 | 32 |
33 const int32_t LUMINANCE_BITS = 5; | 33 const int32_t LUMINANCE_BITS = 5; |
34 const int32_t LUMINANCE_SHIFT = 8 - LUMINANCE_BITS; | 34 const int32_t LUMINANCE_SHIFT = 8 - LUMINANCE_BITS; |
35 const int32_t LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS; | 35 const int32_t LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS; |
36 | 36 |
37 CBC_GlobalHistogramBinarizer::CBC_GlobalHistogramBinarizer( | 37 CBC_GlobalHistogramBinarizer::CBC_GlobalHistogramBinarizer( |
38 CBC_LuminanceSource* source) | 38 CBC_LuminanceSource* source) |
39 : CBC_Binarizer(source) {} | 39 : CBC_Binarizer(source) {} |
40 CBC_GlobalHistogramBinarizer::~CBC_GlobalHistogramBinarizer() {} | 40 CBC_GlobalHistogramBinarizer::~CBC_GlobalHistogramBinarizer() {} |
41 CBC_CommonBitArray* CBC_GlobalHistogramBinarizer::GetBlackRow( | 41 CBC_CommonBitArray* CBC_GlobalHistogramBinarizer::GetBlackRow( |
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164 int32_t fromFirst = x - firstPeak; | 164 int32_t fromFirst = x - firstPeak; |
165 int32_t score = fromFirst * fromFirst * (secondPeak - x) * | 165 int32_t score = fromFirst * fromFirst * (secondPeak - x) * |
166 (maxBucketCount - buckets[x]); | 166 (maxBucketCount - buckets[x]); |
167 if (score > bestValleyScore) { | 167 if (score > bestValleyScore) { |
168 bestValley = x; | 168 bestValley = x; |
169 bestValleyScore = score; | 169 bestValleyScore = score; |
170 } | 170 } |
171 } | 171 } |
172 return bestValley << LUMINANCE_SHIFT; | 172 return bestValley << LUMINANCE_SHIFT; |
173 } | 173 } |
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