Method of describing image information

Details Method of describing image information Method of describing image information

1988-05-18

1990-07-24

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 21, 382 56, 358108, G06K 900

Patent

active

049440233

ABSTRACT:
A method of describing an image made up of a plurality of kinds of regions in an n-dimensional space by a tree structure, comprises the steps of recursively and equally dividing the image into 2.sup.n regions until each region includes two or less kinds of regions, thereby making a first level of the tree structure, and recursively and equally subdividing each of the 2.sup.n regions into 2.sup.n subregions until each subregion includes only one kind of region and for describing only one of two kinds of regions by a tree structure in which each parent node which degree is one and only having one branch is integrated into a filial node thereof, thereby making a second level of the tree structure. Each filial node in the second level of the tree structure is added with first division information described by sequential data of 2.sup.n kinds of codes corresponding to position information of each filial node with respect to a parent node thereof, and each leaf in the second level of the tree structure is added with second division information describing at least a least significant code of the first division information by 2.sup.n or more kinds of codes which are pattern information of each leaf with respect to a parent node thereof.

REFERENCES:
patent: 4597101 (1986-06-01), Kishimoto et al.
patent: 4692806 (1987-09-01), Anderson et al.
patent: 4783841 (1988-11-01), Crayson
patent: 4831659 (1989-05-01), Miyaoka et al.
Hanan Samet, "The Quadtree and Related Hierarchical Data Structures", Computing Surveys, vol. 16, No. 2, Jun. 1984.

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