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* File: feature_bmp.h
* Description: Declaration of the Bitmap Feature Class
* Author: PingPing xiu (xiupingping) & Ahmad Abdulkader
* Created: 2007
*
* (C) Copyright 2008, Google Inc.
** 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.
*
**********************************************************************/
// The FeatureBmp class implements a Bitmap feature extractor class. It
// inherits from the FeatureBase class
// The Bitmap feature vectors is the the bitmap of the specified CharSamp
// scaled to a fixed grid size and then augmented by a 5 aux features that
// describe the size, aspect ration and placement within a word
#ifndef FEATURE_BMP_H
#define FEATURE_BMP_H
#include "char_samp.h"
#include "feature_base.h"
namespace tesseract {
class FeatureBmp : public FeatureBase {
public:
explicit FeatureBmp(TuningParams *params);
virtual ~FeatureBmp();
// Render a visualization of the features to a CharSamp.
// This is mainly used by visual-debuggers
virtual CharSamp *ComputeFeatureBitmap(CharSamp *samp);
// Compute the features for a given CharSamp
virtual bool ComputeFeatures(CharSamp *samp, float *features);
// Returns the count of features
virtual int FeatureCnt() {
return 5 + (conv_grid_size_ * conv_grid_size_);
}
protected:
// grid size, cached from the TuningParams object
int conv_grid_size_;
};
}
#endif // FEATURE_BMP_H
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