tesseract
3.03
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00001 /********************************************************************** 00002 * File: degradeimage.h 00003 * Description: Function to degrade an image (usually of text) as if it 00004 * has been printed and then scanned. 00005 * Authors: Ray Smith 00006 * Created: Tue Nov 19 2013 00007 * 00008 * (C) Copyright 2013, Google Inc. 00009 * Licensed under the Apache License, Version 2.0 (the "License"); 00010 * you may not use this file except in compliance with the License. 00011 * You may obtain a copy of the License at 00012 * http://www.apache.org/licenses/LICENSE-2.0 00013 * Unless required by applicable law or agreed to in writing, software 00014 * distributed under the License is distributed on an "AS IS" BASIS, 00015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00016 * See the License for the specific language governing permissions and 00017 * limitations under the License. 00018 * 00019 **********************************************************************/ 00020 #ifndef TESSERACT_TRAINING_DEGRADEIMAGE_H_ 00021 #define TESSERACT_TRAINING_DEGRADEIMAGE_H_ 00022 00023 struct Pix; 00024 00025 namespace tesseract { 00026 00027 // Degrade the pix as if by a print/copy/scan cycle with exposure > 0 00028 // corresponding to darkening on the copier and <0 lighter and 0 not copied. 00029 // If rotation is not NULL, the clockwise rotation in radians is saved there. 00030 // The input pix must be 8 bit grey. (Binary with values 0 and 255 is OK.) 00031 // The input image is destroyed and a different image returned. 00032 struct Pix* DegradeImage(struct Pix* input, int exposure, float* rotation); 00033 00034 } // namespace tesseract 00035 00036 #endif // TESSERACT_TRAINING_DEGRADEIMAGE_H_