# Fractals/Computer graphic techniques/2D/grid

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The domain has been discretized into a mesh and then rasterized to the image

## Contents

## Image[edit]

Digital image

- binary image ( 1-bit color)
^{[1]} - grayscale image
- color image

# grid[edit]

- grid
^{[2]}^{[3]} - mesh
- tiling
- tesselation of the plane
- Set partitions

## Dimension[edit]

- 2D
- 3D

## Types[edit]

- regular mesh = Structured grid = global grid ( finite differences)
- a quadrilateral grid is most common in structured grids
- quadratic

- a triangular mesh
- "the Coxeter-Freudenthal triangulation. It is constructed by dividing space using a uniform cubic grid and the triangulation is obtained by subdividing each cube."
^{[4]}^{[5]}

- "the Coxeter-Freudenthal triangulation. It is constructed by dividing space using a uniform cubic grid and the triangulation is obtained by subdividing each cube."
- hexagonal

- a quadrilateral grid is most common in structured grids
- An unstructured = irregular grid, adaptive grid, local grid ( fast marching methods)
- Quadtree Grid
- BSP tree
- A triangular surface mesh is always quick and easy to create. It is most common in unstructured grids.

tilings by regular polygons: regular (=structured ) grid

## Pixel connectivity[edit]

Pixel connectivity in wikipedia

## creating[edit]

- gnuplot
^{[6]}

# coordinate system[edit]

In geometry, a coordinate system is a system which uses one or more numbers (= coordinates) to uniquely determine the position of a point in the space^{[7]}

# See also[edit]

# references[edit]

- ↑ stackoverflow question: how-can-i-display-a-2d-binary-matrix-as-a-black-white-plot
- ↑ wikipedia: Regular_grid
- ↑ Stuttgart Visualization Course
- ↑ Image Segmentation Using Topologically Adaptable Surfaces by Tim McInerney and Demetri Terzopoulos. Published in the Proc. CVRMed'97, Grenoble, France, March, 1997.
- ↑ T-snakes: Topology adaptive snakes by Tim McInerney , Demetri Terzopoulos. Medical Image Analysis 4 (2000) 73–91
- ↑ gnuplot docs: grid
- ↑ wikipedia : coordinate system