/ocr/ocrservice/jni/hydrogen/src/thresholder.h

 1/*
 2 * Copyright 2010, Google Inc.
 3 *
 4 * Licensed under the Apache License, Version 2.0 (the "License");
 5 * you may not use this file except in compliance with the License.
 6 * You may obtain a copy of the License at
 7 *
 8 *     http://www.apache.org/licenses/LICENSE-2.0
 9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef HYDROGEN_THRESHOLDER_H_
18#define HYDROGEN_THRESHOLDER_H_
19
20#include "leptonica.h"
21
22l_int32 pixGetFisherThresh(PIX *pixs, l_float32 scorefract, l_float32 *pfdr, l_int32 *pthresh);
23
24l_int32 pixFisherAdaptiveThreshold(PIX *pixs, PIX **ppixd, l_int32 tile_x, l_int32 tile_y,
25                                l_float32 score_fract, l_float32 thresh);
26
27PIX *pixThreshedSobelEdgeFilter(PIX *pixs, l_int32 threshold);
28
29l_uint8 pixGradientEnergy(PIX *pixs, PIX *mask, l_float32 *pdensity);
30
31l_uint8 pixEdgeMax(PIX *pixs, l_int32 *pmax, l_int32 *pavg);
32
33l_uint8 pixEdgeAdaptiveThreshold(PIX *pixs, PIX **ppixd, l_int32 tile_x, l_int32 tile_y,
34                                 l_int32 thresh, l_int32 avg_thresh);
35
36#endif /* HYDROGEN_THRESHOLDER_H_ */