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56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
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/**********************************************************************
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* File: feature_base.h
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* Description: Declaration of the Feature Base Class
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* Author: Ping Ping (xiupingping), Ahmad Abdulkader
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* Created: 2007
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*
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* (C) Copyright 2008, Google Inc.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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// The FeatureBase class is the base class for any Feature Extraction class
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// It provided 3 pure virtual functions (to inherit):
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// 1- FeatureCnt: A method to returns the count of features
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// 2- ComputeFeatures: A method to compute the features for a given CharSamp
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// 3- ComputeFeatureBitmap: A method to render a visualization of the features
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// to a CharSamp. This is mainly used by visual-debuggers
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#ifndef FEATURE_BASE_H
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#define FEATURE_BASE_H
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#include "char_samp.h"
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#include "tuning_params.h"
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namespace tesseract {
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class FeatureBase {
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public:
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explicit FeatureBase(TuningParams *params)
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: params_(params) {
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}
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virtual ~FeatureBase() {}
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// Compute the features for a given CharSamp
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virtual bool ComputeFeatures(CharSamp *char_samp, float *features) = 0;
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// Render a visualization of the features to a CharSamp.
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// This is mainly used by visual-debuggers
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virtual CharSamp *ComputeFeatureBitmap(CharSamp *char_samp) = 0;
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// Returns the count of features
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virtual int FeatureCnt() = 0;
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protected:
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TuningParams *params_;
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};
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}
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#endif // FEATURE_BASE_H
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