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git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@1082 d0cd1f9f-072b-0410-8dd7-cf729c803f20
40 lines
1.6 KiB
C++
40 lines
1.6 KiB
C++
/**********************************************************************
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* File: degradeimage.h
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* Description: Function to degrade an image (usually of text) as if it
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* has been printed and then scanned.
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* Authors: Ray Smith
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* Created: Tue Nov 19 2013
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*
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* (C) Copyright 2013, 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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#ifndef TESSERACT_TRAINING_DEGRADEIMAGE_H_
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#define TESSERACT_TRAINING_DEGRADEIMAGE_H_
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struct Pix;
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namespace tesseract {
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class TRand;
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// Degrade the pix as if by a print/copy/scan cycle with exposure > 0
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// corresponding to darkening on the copier and <0 lighter and 0 not copied.
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// If rotation is not NULL, the clockwise rotation in radians is saved there.
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// The input pix must be 8 bit grey. (Binary with values 0 and 255 is OK.)
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// The input image is destroyed and a different image returned.
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struct Pix* DegradeImage(struct Pix* input, int exposure, TRand* randomizer,
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float* rotation);
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} // namespace tesseract
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#endif // TESSERACT_TRAINING_DEGRADEIMAGE_H_
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