US 6,480,631 B2Granted

Geometrical image processing apparatus and method of transforming parts of a divided image

AssigneeFuji Xerox Co., Ltd.

InventorsIkken So, Taro Yokose, Koumei Tomida, Fujio Ihara

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Abstract

The present invention presents an image processing apparatus that performs rotation, enlargement, reduction, clipping or overlapping processing of images at high speed using low capacity memories instead of page memories and without the need to read image data in repetition. A first band data storing element receives input image data line by line and stores it as local data. The local data stored in the first band data storing element is transformed by local data transforming element and then stored in a transformed data storing element. The local data is then read in the order it is to be output and stored in a second band data storing element. An image output element then outputs the local data as an output image.

Claims14

Dependent claims

An image processing apparatus comprising:

an image data input unit that inputs image data;
a first data storing unit that stores a portion of the image data;
a local data transform unit that performs a predetermined image processing upon each local data that constitutes each of the portions of the image data to generate transformed local data, wherein the predetermined image processing processes the image data of a single image;
a transformed data storing unit that stores the transformed local data in the local data transform unit:
a global data transform unit that performs a predetermined image processing upon the transformed local data after completing the local data transform processing;
a second data storing unit that stores the transformed local data in output order;
an address control unit that controls a reading order of the first data storing unit and the transformed data storing unit;
and
an image output unit that outputs the transformed local data stored in the second data storing unit as output image data.

6 more elements

An image processing apparatus that performs image processing by dividing the process into local processing and global processing, comprising:

an image input unit that inputs image data;
a first data storing unit that stores parts of the input image in the order of input;
a local data transform unit that extracts local data from parts of the image data stored in the first data storing unit and transforms the local data by performing local processing upon the local data to generate transformed local data, wherein the local processing processes the local data of a single image;
a transformed data storing unit that stores the transformed local data;
a global data transform unit that performs a predetermined image processing upon the transformed local data after the local data transform processing;
a second data storing unit that stores portions of the transformed local data, the portions of the transformed local data being extracted from the transformed data storing unit in correspondence with the global processing;
and
an image output unit that outputs output image data based on the portions of the transformed local data stored in the second data storing unit.

5 more elements

Dependencies are inferred from the claim text.