mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-27 20:59:36 +08:00
42bfdc21d8
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++
/**********************************************************************
|
|
* File: degradeimage.h
|
|
* Description: Function to degrade an image (usually of text) as if it
|
|
* has been printed and then scanned.
|
|
* Authors: Ray Smith
|
|
* Created: Tue Nov 19 2013
|
|
*
|
|
* (C) Copyright 2013, 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.
|
|
*
|
|
**********************************************************************/
|
|
#ifndef TESSERACT_TRAINING_DEGRADEIMAGE_H_
|
|
#define TESSERACT_TRAINING_DEGRADEIMAGE_H_
|
|
|
|
struct Pix;
|
|
|
|
namespace tesseract {
|
|
|
|
class TRand;
|
|
|
|
// Degrade the pix as if by a print/copy/scan cycle with exposure > 0
|
|
// corresponding to darkening on the copier and <0 lighter and 0 not copied.
|
|
// If rotation is not NULL, the clockwise rotation in radians is saved there.
|
|
// The input pix must be 8 bit grey. (Binary with values 0 and 255 is OK.)
|
|
// The input image is destroyed and a different image returned.
|
|
struct Pix* DegradeImage(struct Pix* input, int exposure, TRand* randomizer,
|
|
float* rotation);
|
|
|
|
} // namespace tesseract
|
|
|
|
#endif // TESSERACT_TRAINING_DEGRADEIMAGE_H_
|