gradechop.cpp

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/* -*-C-*-
 ********************************************************************************
 *
 * File:         gradechop.cpp  (Formerly gradechop.c)
 * Description:
 * Author:       Mark Seaman, OCR Technology
 * Created:      Fri Oct 16 14:37:00 1987
 * Modified:     Tue Jul 30 16:06:27 1991 (Mark Seaman) marks@hpgrlt
 * Language:     C
 * Package:      N/A
 * Status:       Reusable Software Component
 *
 * (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.
 *
 *********************************************************************************/
/*----------------------------------------------------------------------
              I n c l u d e s
----------------------------------------------------------------------*/

#include "wordrec.h"
#include "chop.h"
#include <algorithm>
#include <cmath>

/*----------------------------------------------------------------------
              M a c r o s
----------------------------------------------------------------------*/

namespace tesseract {

/*----------------------------------------------------------------------
              F u n c t i o n s
----------------------------------------------------------------------*/

/**********************************************************************
 * grade_split_length
 *
 * Return a grade for the length of this split.
 *   0    =  "perfect"
 *   100  =  "no way jay"
 **********************************************************************/
PRIORITY Wordrec::grade_split_length(SPLIT *split) {
  PRIORITY grade;
  float split_length;

  split_length =
      split->point1->WeightedDistance(*split->point2, chop_x_y_weight);

  if (split_length <= 0)
    grade = 0;
  else
    grade = sqrt (split_length) * chop_split_dist_knob;

  return (std::max(0.0f, grade));
}


/**********************************************************************
 * grade_sharpness
 *
 * Return a grade for the sharpness of this split.
 *   0    =  "perfect"
 *   100  =  "no way jay"
 **********************************************************************/
PRIORITY Wordrec::grade_sharpness(SPLIT *split) {
  PRIORITY grade;

  grade = point_priority (split->point1) + point_priority (split->point2);

  if (grade < -360.0)
    grade = 0;
  else
    grade += 360.0;

  grade *= chop_sharpness_knob;       /* Values 0 to -360 */

  return (grade);
}


}  // namespace tesseract