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      1 /*
      2   Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization
      3   dedicated to making software imaging solutions freely available.
      4 
      5   You may not use this file except in compliance with the License.
      6   obtain a copy of the License at
      7 
      8     http://www.imagemagick.org/script/license.php
      9 
     10   Unless required by applicable law or agreed to in writing, software
     11   distributed under the License is distributed on an "AS IS" BASIS,
     12   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13   See the License for the specific language governing permissions and
     14   limitations under the License.
     15 
     16   MagickCore image compare methods.
     17 */
     18 #ifndef MAGICKCORE_COMPARE_H
     19 #define MAGICKCORE_COMPARE_H
     20 
     21 #include "MagickCore/image.h"
     22 
     23 #if defined(__cplusplus) || defined(c_plusplus)
     24 extern "C" {
     25 #endif
     26 
     27 typedef enum
     28 {
     29   UndefinedErrorMetric,
     30   AbsoluteErrorMetric,
     31   FuzzErrorMetric,
     32   MeanAbsoluteErrorMetric,
     33   MeanErrorPerPixelErrorMetric,
     34   MeanSquaredErrorMetric,
     35   NormalizedCrossCorrelationErrorMetric,
     36   PeakAbsoluteErrorMetric,
     37   PeakSignalToNoiseRatioErrorMetric,
     38   PerceptualHashErrorMetric,
     39   RootMeanSquaredErrorMetric
     40 } MetricType;
     41 
     42 extern MagickExport double
     43   *GetImageDistortions(Image *,const Image *,const MetricType,ExceptionInfo *);
     44 
     45 extern MagickExport Image
     46   *CompareImages(Image *,const Image *,const MetricType,double *,
     47     ExceptionInfo *),
     48   *SimilarityImage(const Image *,const Image *,const MetricType,const double,
     49     RectangleInfo *,double *,ExceptionInfo *);
     50 
     51 extern MagickExport MagickBooleanType
     52   GetImageDistortion(Image *,const Image *,const MetricType,double *,
     53     ExceptionInfo *),
     54   IsImagesEqual(const Image *,const Image *,ExceptionInfo *),
     55   SetImageColorMetric(Image *,const Image *,ExceptionInfo *);
     56 
     57 #if defined(__cplusplus) || defined(c_plusplus)
     58 }
     59 #endif
     60 
     61 #endif
     62