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diff --git a/tesseract/src/wordrec/chop.h b/tesseract/src/wordrec/chop.h
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+/******************************************************************************
+ *
+ * File:        chop.h
+ * Author:      Mark Seaman, SW Productivity
+ *
+ * (c) Copyright 1987, Hewlett-Packard Company.
+ ** 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.
+ *
+ *****************************************************************************/
+
+#ifndef CHOP_H
+#define CHOP_H
+
+#include "genericheap.h"
+#include "kdpair.h"
+#include "seam.h"
+
+namespace tesseract {
+
+#define MAX_NUM_POINTS 50
+
+// The PointPair elements do NOT own the EDGEPTs.
+using PointPair = KDPairInc<float, EDGEPT*>;
+using PointHeap = GenericHeap<PointPair>;
+
+} // namespace tesseract
+
+#endif