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twain3.0/3rdparty/hgOCR/leptonica/morph.h

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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
#ifndef LEPTONICA_MORPH_H
#define LEPTONICA_MORPH_H
/*!
* \file morph.h
*
* <pre>
* Contains the following structs:
* struct Sel
* struct Sela
* struct Kernel
*
* Contains definitions for:
* morphological b.c. flags
* structuring element types
* runlength flags for granulometry
* direction flags for grayscale morphology
* morphological operation flags
* standard border size
* grayscale intensity scaling flags
* morphological tophat flags
* arithmetic and logical operator flags
* grayscale morphology selection flags
* distance function b.c. flags
* image comparison flags
* color content flags
* </pre>
*/
/*-------------------------------------------------------------------------*
* Sel and Sel array *
*-------------------------------------------------------------------------*/
#define SEL_VERSION_NUMBER 1
/*! Selection */
struct Sel
{
l_int32 sy; /*!< sel height */
l_int32 sx; /*!< sel width */
l_int32 cy; /*!< y location of sel origin */
l_int32 cx; /*!< x location of sel origin */
l_int32 **data; /*!< {0,1,2}; data[i][j] in [row][col] order */
char *name; /*!< used to find sel by name */
};
typedef struct Sel SEL;
/*! Array of Sel */
struct Sela
{
l_int32 n; /*!< number of sel actually stored */
l_int32 nalloc; /*!< size of allocated ptr array */
struct Sel **sel; /*!< sel ptr array */
};
typedef struct Sela SELA;
/*-------------------------------------------------------------------------*
* Kernel *
*-------------------------------------------------------------------------*/
#define KERNEL_VERSION_NUMBER 2
/*! Kernel */
struct L_Kernel
{
l_int32 sy; /*!< kernel height */
l_int32 sx; /*!< kernel width */
l_int32 cy; /*!< y location of kernel origin */
l_int32 cx; /*!< x location of kernel origin */
l_float32 **data; /*!< data[i][j] in [row][col] order */
};
typedef struct L_Kernel L_KERNEL;
/*-------------------------------------------------------------------------*
* Morphological boundary condition flags *
* *
* Two types of boundary condition for erosion. *
* The global variable MORPH_BC takes on one of these two values. *
* See notes in morph.c for usage. *
*-------------------------------------------------------------------------*/
/*! Morph Boundary */
enum {
SYMMETRIC_MORPH_BC = 0,
ASYMMETRIC_MORPH_BC = 1
};
/*-------------------------------------------------------------------------*
* Structuring element vals *
*-------------------------------------------------------------------------*/
/*! SEL Vals */
enum {
SEL_DONT_CARE = 0,
SEL_HIT = 1,
SEL_MISS = 2
};
/*-------------------------------------------------------------------------*
* Runlength flags for granulometry *
*-------------------------------------------------------------------------*/
/*! Runlength Polarity */
enum {
L_RUN_OFF = 0,
L_RUN_ON = 1
};
/*-------------------------------------------------------------------------*
* Direction flags for grayscale morphology, granulometry, *
* composable Sels, convolution, etc. *
*-------------------------------------------------------------------------*/
/*! Direction Flags */
enum {
L_HORIZ = 1,
L_VERT = 2,
L_BOTH_DIRECTIONS = 3
};
/*-------------------------------------------------------------------------*
* Morphological operation flags *
*-------------------------------------------------------------------------*/
/*! Morph Operator */
enum {
L_MORPH_DILATE = 1,
L_MORPH_ERODE = 2,
L_MORPH_OPEN = 3,
L_MORPH_CLOSE = 4,
L_MORPH_HMT = 5
};
/*-------------------------------------------------------------------------*
* Grayscale intensity scaling flags *
*-------------------------------------------------------------------------*/
/*! Pixel Value Scaling */
enum {
L_LINEAR_SCALE = 1,
L_LOG_SCALE = 2
};
/*-------------------------------------------------------------------------*
* Morphological tophat flags *
*-------------------------------------------------------------------------*/
/*! Morph Tophat */
enum {
L_TOPHAT_WHITE = 0,
L_TOPHAT_BLACK = 1
};
/*-------------------------------------------------------------------------*
* Arithmetic and logical operator flags *
* (use on grayscale images and Numas) *
*-------------------------------------------------------------------------*/
/*! ArithLogical Ops */
enum {
L_ARITH_ADD = 1,
L_ARITH_SUBTRACT = 2,
L_ARITH_MULTIPLY = 3, /* on numas only */
L_ARITH_DIVIDE = 4, /* on numas only */
L_UNION = 5, /* on numas only */
L_INTERSECTION = 6, /* on numas only */
L_SUBTRACTION = 7, /* on numas only */
L_EXCLUSIVE_OR = 8 /* on numas only */
};
/*-------------------------------------------------------------------------*
* Min/max selection flags *
*-------------------------------------------------------------------------*/
/*! MinMax Selection */
enum {
L_CHOOSE_MIN = 1, /* useful in a downscaling "erosion" */
L_CHOOSE_MAX = 2, /* useful in a downscaling "dilation" */
L_CHOOSE_MAXDIFF = 3, /* useful in a downscaling contrast */
L_CHOOSE_MIN_BOOST = 4, /* use a modification of the min value */
L_CHOOSE_MAX_BOOST = 5 /* use a modification of the max value */
};
/*-------------------------------------------------------------------------*
* Exterior value b.c. for distance function flags *
*-------------------------------------------------------------------------*/
/*! Exterior Value */
enum {
L_BOUNDARY_BG = 1, /* assume bg outside image */
L_BOUNDARY_FG = 2 /* assume fg outside image */
};
/*-------------------------------------------------------------------------*
* Image comparison flags *
*-------------------------------------------------------------------------*/
/*! Image Comparison */
enum {
L_COMPARE_XOR = 1,
L_COMPARE_SUBTRACT = 2,
L_COMPARE_ABS_DIFF = 3
};
/*-------------------------------------------------------------------------*
* Color content flags *
*-------------------------------------------------------------------------*/
/*! Color Content */
enum {
L_MAX_DIFF_FROM_AVERAGE_2 = 1,
L_MAX_MIN_DIFF_FROM_2 = 2,
L_MAX_DIFF = 3
};
/*-------------------------------------------------------------------------*
* Standard size of border added around images for special processing *
*-------------------------------------------------------------------------*/
static const l_int32 ADDED_BORDER = 32; /*!< pixels, not bits */
#endif /* LEPTONICA_MORPH_H */
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