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| Utilities to manage pixel neighborhoods |
--- | --- | ---

## Namespaces

namespace | vigra::EightNeighborhood
namespace | vigra::FourNeighborhood

## Classes

class | NeighborOffsetCirculator
| Circulator that walks around a given location. More...

## Typedefs

typedef FourNeighborhood::NeighborCode | FourNeighborCode
typedef EightNeighborhood::NeighborCode | EightNeighborCode
typedef NeighborOffsetCirculator< EightNeighborCode > | EightNeighborOffsetCirculator
typedef NeighborOffsetCirculator< FourNeighborCode > | FourNeighborOffsetCirculator

## Enumerations

enum | AtImageBorder { NotAtBorder = 0, RightBorder = 1, LeftBorder = 2, TopBorder = 4, BottomBorder = 8, TopRightBorder = TopBorder | RightBorder, TopLeftBorder = TopBorder | LeftBorder, BottomLeftBorder = BottomBorder | LeftBorder, BottomRightBorder = BottomBorder | RightBorder }
| Encode whether a point is near the image border. More...

## Functions

AtImageBorder | isAtImageBorder (int x, int y, int width, int height)
| Find out whether a point is at the image border.

## Detailed Description

4- and 8-neighborhood definitions and circulators.

#include "vigra/pixelneighborhood.hxx"

See also: vigra::NeighborhoodCirculator

## Typedef Documentation

typedef EightNeighborhood::NeighborCode EightNeighborCode

| Export vigra::EightNeighborhood::NeighborCode into the scope of namespace vigra.

typedef NeighborOffsetCirculator<EightNeighborCode> EightNeighborOffsetCirculator

| Specialization of NeighborOffsetCirculator for 8-neighborhood.

typedef FourNeighborhood::NeighborCode FourNeighborCode

| Export vigra::FourNeighborhood::NeighborCode into the scope of namespace vigra.

typedef NeighborOffsetCirculator<FourNeighborCode> FourNeighborOffsetCirculator

| Specialization of NeighborOffsetCirculator for 4-neighborhood.

## Enumeration Type Documentation

enum AtImageBorder

Encode whether a point is near the image border.

This enum is used with isAtImageBorder() and vigra::RestrictedNeighborhoodCirculator.

#include "vigra/pixelneighborhood.hxx"
Namespace: vigra

Enumeration values:

  NotAtBorder |
  RightBorder |
  LeftBorder |
  TopBorder |
  BottomBorder |
  TopRightBorder |
  TopLeftBorder |
  BottomLeftBorder |
  BottomRightBorder |

## Function Documentation

AtImageBorder isAtImageBorder | ( | int | x,
|  | int | y,
|  | int | width,
|  | int | height
| ) | `[inline]`

| Find out whether a point is at the image border. This function checks if x == 0 or x == width - 1 and y == 0 or y == height - 1 and returns the appropriate value of Utilities to manage pixel neighborhoods, or zero when the point is not at te image border. The behavior of the function is undefined if (x,y) is not inside the image. #include "vigra/pixelneighborhood.hxx" Namespace: vigra

© Ullrich Köthe (koethe@informatik.uni-hamburg.de) Cognitive Systems Group, University of Hamburg, Germany | html generated using doxygen and Python VIGRA 1.5.0 (7 Dec 2006)