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Diffstat (limited to 'xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp')
-rw-r--r--xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp338
1 files changed, 169 insertions, 169 deletions
diff --git a/xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp b/xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
index 24c17712cc..42438978df 100644
--- a/xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
+++ b/xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
@@ -1,169 +1,169 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-// Original code is licensed as follows:
-/*
- * Copyright 2009 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "xfa/src/fxbarcode/barcode.h"
-#include "xfa/src/fxbarcode/BC_Binarizer.h"
-#include "xfa/src/fxbarcode/BC_LuminanceSource.h"
-#include "BC_CommonBitMatrix.h"
-#include "BC_CommonBitArray.h"
-#include "BC_GlobalHistogramBinarizer.h"
-const int32_t LUMINANCE_BITS = 5;
-const int32_t LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
-const int32_t LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
-CBC_GlobalHistogramBinarizer::CBC_GlobalHistogramBinarizer(
- CBC_LuminanceSource* source)
- : CBC_Binarizer(source) {}
-CBC_GlobalHistogramBinarizer::~CBC_GlobalHistogramBinarizer() {}
-CBC_CommonBitArray* CBC_GlobalHistogramBinarizer::GetBlackRow(
- int32_t y,
- CBC_CommonBitArray* row,
- int32_t& e) {
- CBC_LuminanceSource* source = GetLuminanceSource();
- int32_t width = source->GetWidth();
- CBC_AutoPtr<CBC_CommonBitArray> result(new CBC_CommonBitArray(width));
- InitArrays(width);
- CFX_ByteArray* localLuminances = source->GetRow(y, m_luminance, e);
- if (e != BCExceptionNO) {
- return result.release();
- }
- CFX_Int32Array localBuckets;
- localBuckets.Copy(m_buckets);
- int32_t x;
- for (x = 0; x < width; x++) {
- int32_t pixel = (*localLuminances)[x] & 0xff;
- localBuckets[pixel >> LUMINANCE_SHIFT]++;
- }
- int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
- if (e != BCExceptionNO) {
- return result.release();
- }
- int32_t left = (*localLuminances)[0] & 0xff;
- int32_t center = (*localLuminances)[1] & 0xff;
- for (x = 1; x < width - 1; x++) {
- int32_t right = (*localLuminances)[x + 1] & 0xff;
- int32_t luminance = ((center << 2) - left - right) >> 1;
- if (luminance < blackPoint) {
- result->Set(x);
- }
- left = center;
- center = right;
- }
- return result.release();
-}
-CBC_CommonBitMatrix* CBC_GlobalHistogramBinarizer::GetBlackMatrix(int32_t& e) {
- CBC_LuminanceSource* source = GetLuminanceSource();
- int32_t width = source->GetWidth();
- int32_t height = source->GetHeight();
- CBC_CommonBitMatrix* BitMatrixTemp = new CBC_CommonBitMatrix();
- BitMatrixTemp->Init(width, height);
- CBC_AutoPtr<CBC_CommonBitMatrix> matrix(BitMatrixTemp);
- InitArrays(width);
- CFX_Int32Array localBuckets;
- localBuckets.Copy(m_buckets);
- int32_t y;
- for (y = 1; y < 5; y++) {
- int32_t row = height * y / 5;
- CFX_ByteArray* localLuminances = source->GetRow(row, m_luminance, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- int32_t right = (width << 2) / 5;
- int32_t x;
- for (x = width / 5; x < right; x++) {
- int32_t pixel = (*localLuminances)[x] & 0xff;
- localBuckets[pixel >> LUMINANCE_SHIFT]++;
- }
- }
- int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
- BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
- CBC_AutoPtr<CFX_ByteArray> localLuminances(source->GetMatrix());
- for (y = 0; y < height; y++) {
- int32_t offset = y * width;
- for (int32_t x = 0; x < width; x++) {
- int32_t pixel = (*localLuminances)[offset + x] & 0xff;
- if (pixel < blackPoint) {
- matrix->Set(x, y);
- }
- }
- }
- return matrix.release();
-}
-void CBC_GlobalHistogramBinarizer::InitArrays(int32_t luminanceSize) {
- if (m_luminance.GetSize() < luminanceSize) {
- m_luminance.SetSize(luminanceSize);
- }
- if (m_buckets.GetSize() <= 0) {
- m_buckets.SetSize(LUMINANCE_BUCKETS);
- } else {
- int32_t x;
- for (x = 0; x < LUMINANCE_BUCKETS; x++) {
- m_buckets[x] = 0;
- }
- }
-}
-int32_t CBC_GlobalHistogramBinarizer::EstimateBlackPoint(
- CFX_Int32Array& buckets,
- int32_t& e) {
- int32_t numBuckets = buckets.GetSize();
- int32_t maxBucketCount = 0;
- int32_t firstPeak = 0;
- int32_t firstPeakSize = 0;
- int32_t x;
- for (x = 0; x < numBuckets; x++) {
- if (buckets[x] > firstPeakSize) {
- firstPeak = x;
- firstPeakSize = buckets[x];
- }
- if (buckets[x] > maxBucketCount) {
- maxBucketCount = buckets[x];
- }
- }
- int32_t secondPeak = 0;
- int32_t secondPeakScore = 0;
- for (x = 0; x < numBuckets; x++) {
- int32_t distanceToBiggest = x - firstPeak;
- int32_t score = buckets[x] * distanceToBiggest * distanceToBiggest;
- if (score > secondPeakScore) {
- secondPeak = x;
- secondPeakScore = score;
- }
- }
- if (firstPeak > secondPeak) {
- int32_t temp = firstPeak;
- firstPeak = secondPeak;
- secondPeak = temp;
- }
- if (secondPeak - firstPeak <= numBuckets >> 4) {
- e = BCExceptionRead;
- return 0;
- }
- int32_t bestValley = secondPeak - 1;
- int32_t bestValleyScore = -1;
- for (x = secondPeak - 1; x > firstPeak; x--) {
- int32_t fromFirst = x - firstPeak;
- int32_t score = fromFirst * fromFirst * (secondPeak - x) *
- (maxBucketCount - buckets[x]);
- if (score > bestValleyScore) {
- bestValley = x;
- bestValleyScore = score;
- }
- }
- return bestValley << LUMINANCE_SHIFT;
-}
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+// Original code is licensed as follows:
+/*
+ * Copyright 2009 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "xfa/src/fxbarcode/barcode.h"
+#include "xfa/src/fxbarcode/BC_Binarizer.h"
+#include "xfa/src/fxbarcode/BC_LuminanceSource.h"
+#include "BC_CommonBitMatrix.h"
+#include "BC_CommonBitArray.h"
+#include "BC_GlobalHistogramBinarizer.h"
+const int32_t LUMINANCE_BITS = 5;
+const int32_t LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
+const int32_t LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
+CBC_GlobalHistogramBinarizer::CBC_GlobalHistogramBinarizer(
+ CBC_LuminanceSource* source)
+ : CBC_Binarizer(source) {}
+CBC_GlobalHistogramBinarizer::~CBC_GlobalHistogramBinarizer() {}
+CBC_CommonBitArray* CBC_GlobalHistogramBinarizer::GetBlackRow(
+ int32_t y,
+ CBC_CommonBitArray* row,
+ int32_t& e) {
+ CBC_LuminanceSource* source = GetLuminanceSource();
+ int32_t width = source->GetWidth();
+ CBC_AutoPtr<CBC_CommonBitArray> result(new CBC_CommonBitArray(width));
+ InitArrays(width);
+ CFX_ByteArray* localLuminances = source->GetRow(y, m_luminance, e);
+ if (e != BCExceptionNO) {
+ return result.release();
+ }
+ CFX_Int32Array localBuckets;
+ localBuckets.Copy(m_buckets);
+ int32_t x;
+ for (x = 0; x < width; x++) {
+ int32_t pixel = (*localLuminances)[x] & 0xff;
+ localBuckets[pixel >> LUMINANCE_SHIFT]++;
+ }
+ int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
+ if (e != BCExceptionNO) {
+ return result.release();
+ }
+ int32_t left = (*localLuminances)[0] & 0xff;
+ int32_t center = (*localLuminances)[1] & 0xff;
+ for (x = 1; x < width - 1; x++) {
+ int32_t right = (*localLuminances)[x + 1] & 0xff;
+ int32_t luminance = ((center << 2) - left - right) >> 1;
+ if (luminance < blackPoint) {
+ result->Set(x);
+ }
+ left = center;
+ center = right;
+ }
+ return result.release();
+}
+CBC_CommonBitMatrix* CBC_GlobalHistogramBinarizer::GetBlackMatrix(int32_t& e) {
+ CBC_LuminanceSource* source = GetLuminanceSource();
+ int32_t width = source->GetWidth();
+ int32_t height = source->GetHeight();
+ CBC_CommonBitMatrix* BitMatrixTemp = new CBC_CommonBitMatrix();
+ BitMatrixTemp->Init(width, height);
+ CBC_AutoPtr<CBC_CommonBitMatrix> matrix(BitMatrixTemp);
+ InitArrays(width);
+ CFX_Int32Array localBuckets;
+ localBuckets.Copy(m_buckets);
+ int32_t y;
+ for (y = 1; y < 5; y++) {
+ int32_t row = height * y / 5;
+ CFX_ByteArray* localLuminances = source->GetRow(row, m_luminance, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ int32_t right = (width << 2) / 5;
+ int32_t x;
+ for (x = width / 5; x < right; x++) {
+ int32_t pixel = (*localLuminances)[x] & 0xff;
+ localBuckets[pixel >> LUMINANCE_SHIFT]++;
+ }
+ }
+ int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ CBC_AutoPtr<CFX_ByteArray> localLuminances(source->GetMatrix());
+ for (y = 0; y < height; y++) {
+ int32_t offset = y * width;
+ for (int32_t x = 0; x < width; x++) {
+ int32_t pixel = (*localLuminances)[offset + x] & 0xff;
+ if (pixel < blackPoint) {
+ matrix->Set(x, y);
+ }
+ }
+ }
+ return matrix.release();
+}
+void CBC_GlobalHistogramBinarizer::InitArrays(int32_t luminanceSize) {
+ if (m_luminance.GetSize() < luminanceSize) {
+ m_luminance.SetSize(luminanceSize);
+ }
+ if (m_buckets.GetSize() <= 0) {
+ m_buckets.SetSize(LUMINANCE_BUCKETS);
+ } else {
+ int32_t x;
+ for (x = 0; x < LUMINANCE_BUCKETS; x++) {
+ m_buckets[x] = 0;
+ }
+ }
+}
+int32_t CBC_GlobalHistogramBinarizer::EstimateBlackPoint(
+ CFX_Int32Array& buckets,
+ int32_t& e) {
+ int32_t numBuckets = buckets.GetSize();
+ int32_t maxBucketCount = 0;
+ int32_t firstPeak = 0;
+ int32_t firstPeakSize = 0;
+ int32_t x;
+ for (x = 0; x < numBuckets; x++) {
+ if (buckets[x] > firstPeakSize) {
+ firstPeak = x;
+ firstPeakSize = buckets[x];
+ }
+ if (buckets[x] > maxBucketCount) {
+ maxBucketCount = buckets[x];
+ }
+ }
+ int32_t secondPeak = 0;
+ int32_t secondPeakScore = 0;
+ for (x = 0; x < numBuckets; x++) {
+ int32_t distanceToBiggest = x - firstPeak;
+ int32_t score = buckets[x] * distanceToBiggest * distanceToBiggest;
+ if (score > secondPeakScore) {
+ secondPeak = x;
+ secondPeakScore = score;
+ }
+ }
+ if (firstPeak > secondPeak) {
+ int32_t temp = firstPeak;
+ firstPeak = secondPeak;
+ secondPeak = temp;
+ }
+ if (secondPeak - firstPeak <= numBuckets >> 4) {
+ e = BCExceptionRead;
+ return 0;
+ }
+ int32_t bestValley = secondPeak - 1;
+ int32_t bestValleyScore = -1;
+ for (x = secondPeak - 1; x > firstPeak; x--) {
+ int32_t fromFirst = x - firstPeak;
+ int32_t score = fromFirst * fromFirst * (secondPeak - x) *
+ (maxBucketCount - buckets[x]);
+ if (score > bestValleyScore) {
+ bestValley = x;
+ bestValleyScore = score;
+ }
+ }
+ return bestValley << LUMINANCE_SHIFT;
+}