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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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