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219 lines
8.1 KiB
C
219 lines
8.1 KiB
C
/*====================================================================*
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- Copyright (C) 2001 Leptonica. All rights reserved.
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- This software is distributed in the hope that it will be
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- useful, but with NO WARRANTY OF ANY KIND.
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- No author or distributor accepts responsibility to anyone for the
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- consequences of using this software, or for whether it serves any
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- particular purpose or works at all, unless he or she says so in
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- writing. Everyone is granted permission to copy, modify and
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- redistribute this source code, for commercial or non-commercial
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- purposes, with the following restrictions: (1) the origin of this
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- source code must not be misrepresented; (2) modified versions must
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- be plainly marked as such; and (3) this notice may not be removed
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- or altered from any source or modified source distribution.
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*====================================================================*/
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#ifndef LEPTONICA_MORPH_H
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#define LEPTONICA_MORPH_H
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/*
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* morph.h
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*
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* Contains the following structs:
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* struct Sel
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* struct Sela
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* struct Kernel
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*
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* Contains definitions for:
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* morphological b.c. flags
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* structuring element types
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* runlength flags for granulometry
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* direction flags for grayscale morphology
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* morphological operation flags
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* standard border size
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* grayscale intensity scaling flags
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* morphological tophat flags
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* arithmetic and logical operator flags
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* grayscale morphology selection flags
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* distance function b.c. flags
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* image comparison flags
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* color content flags
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*/
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/*-------------------------------------------------------------------------*
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* Sel and Sel array *
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*-------------------------------------------------------------------------*/
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#define SEL_VERSION_NUMBER 1
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struct Sel
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{
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l_int32 sy; /* sel height */
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l_int32 sx; /* sel width */
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l_int32 cy; /* y location of sel origin */
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l_int32 cx; /* x location of sel origin */
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l_int32 **data; /* {0,1,2}; data[i][j] in [row][col] order */
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char *name; /* used to find sel by name */
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};
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typedef struct Sel SEL;
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struct Sela
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{
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l_int32 n; /* number of sel actually stored */
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l_int32 nalloc; /* size of allocated ptr array */
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struct Sel **sel; /* sel ptr array */
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};
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typedef struct Sela SELA;
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/*-------------------------------------------------------------------------*
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* Kernel *
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*-------------------------------------------------------------------------*/
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#define KERNEL_VERSION_NUMBER 2
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struct L_Kernel
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{
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l_int32 sy; /* kernel height */
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l_int32 sx; /* kernel width */
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l_int32 cy; /* y location of kernel origin */
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l_int32 cx; /* x location of kernel origin */
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l_float32 **data; /* data[i][j] in [row][col] order */
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};
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typedef struct L_Kernel L_KERNEL;
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/*-------------------------------------------------------------------------*
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* Morphological boundary condition flags *
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*
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* Two types of boundary condition for erosion.
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* The global variable MORPH_BC takes on one of these two values.
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* See notes in morph.c for usage.
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*-------------------------------------------------------------------------*/
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enum {
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SYMMETRIC_MORPH_BC = 0,
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ASYMMETRIC_MORPH_BC = 1
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};
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/*-------------------------------------------------------------------------*
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* Structuring element types *
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*-------------------------------------------------------------------------*/
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enum {
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SEL_DONT_CARE = 0,
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SEL_HIT = 1,
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SEL_MISS = 2
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};
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/*-------------------------------------------------------------------------*
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* Runlength flags for granulometry *
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*-------------------------------------------------------------------------*/
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enum {
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L_RUN_OFF = 0,
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L_RUN_ON = 1
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};
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/*-------------------------------------------------------------------------*
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* Direction flags for grayscale morphology, granulometry, *
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* composable Sels, and convolution *
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*-------------------------------------------------------------------------*/
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enum {
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L_HORIZ = 1,
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L_VERT = 2,
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L_BOTH_DIRECTIONS = 3
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};
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/*-------------------------------------------------------------------------*
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* Morphological operation flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_MORPH_DILATE = 1,
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L_MORPH_ERODE = 2,
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L_MORPH_OPEN = 3,
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L_MORPH_CLOSE = 4,
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L_MORPH_HMT = 5
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};
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/*-------------------------------------------------------------------------*
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* Grayscale intensity scaling flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_LINEAR_SCALE = 1,
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L_LOG_SCALE = 2
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};
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/*-------------------------------------------------------------------------*
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* Morphological tophat flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_TOPHAT_WHITE = 0,
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L_TOPHAT_BLACK = 1
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};
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/*-------------------------------------------------------------------------*
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* Arithmetic and logical operator flags *
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* (use on grayscale images and Numas) *
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*-------------------------------------------------------------------------*/
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enum {
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L_ARITH_ADD = 1,
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L_ARITH_SUBTRACT = 2,
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L_ARITH_MULTIPLY = 3, /* on numas only */
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L_ARITH_DIVIDE = 4, /* on numas only */
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L_UNION = 5, /* on numas only */
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L_INTERSECTION = 6, /* on numas only */
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L_SUBTRACTION = 7, /* on numas only */
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L_EXCLUSIVE_OR = 8 /* on numas only */
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};
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/*-------------------------------------------------------------------------*
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* Min/max selection flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_CHOOSE_MIN = 1, /* useful in a downscaling "erosion" */
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L_CHOOSE_MAX = 2, /* useful in a downscaling "dilation" */
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L_CHOOSE_MAX_MIN_DIFF = 3 /* useful in a downscaling contrast */
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};
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/*-------------------------------------------------------------------------*
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* Distance function b.c. flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_BOUNDARY_BG = 1, /* assume bg outside image */
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L_BOUNDARY_FG = 2 /* assume fg outside image */
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};
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/*-------------------------------------------------------------------------*
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* Image comparison flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_COMPARE_XOR = 1,
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L_COMPARE_SUBTRACT = 2,
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L_COMPARE_ABS_DIFF = 3
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};
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/*-------------------------------------------------------------------------*
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* Color content flags *
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*-------------------------------------------------------------------------*/
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enum {
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L_MAX_DIFF_FROM_AVERAGE_2 = 1,
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L_MAX_MIN_DIFF_FROM_2 = 2,
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L_MAX_DIFF = 3
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};
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/*-------------------------------------------------------------------------*
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* Standard size of border added around images for special processing *
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*-------------------------------------------------------------------------*/
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static const l_int32 ADDED_BORDER = 32; /* pixels, not bits */
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#endif /* LEPTONICA_MORPH_H */
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