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diff --git a/tesseract/src/wordrec/plotedges.h b/tesseract/src/wordrec/plotedges.h
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+/******************************************************************************
+ *
+ * File:         plotedges.h
+ * Description:  Convert the various data type into line lists
+ * Author:       Mark Seaman, OCR Technology
+ *
+ * (c) Copyright 1989, 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 PLOTEDGES_H
+#define PLOTEDGES_H
+
+#include "oldlist.h"  // for LIST
+
+namespace tesseract {
+
+class ScrollView;
+
+struct EDGEPT;
+struct TBLOB;
+
+/*----------------------------------------------------------------------
+              V a r i a b l e s
+----------------------------------------------------------------------*/
+extern ScrollView *edge_window;        /* Window for edges */
+
+/*----------------------------------------------------------------------
+              F u n c t i o n s
+---------------------------------------------------------------------*/
+void display_edgepts(LIST outlines);
+
+void draw_blob_edges(TBLOB *blob);
+
+void mark_outline(EDGEPT *edgept);
+
+} // namespace tesseract
+
+#endif