Canon Inc.

Canon Kabushiki Kaisha

Mark Pulver

David R Brown

Natalie L Kershaw

William C Naylor, Jr

Kia Silverbrook

Ian Richard Gibson

Dominic Yip

William Clark Naylor, Jr

Michael Webb

Trevor Robert Elbourne

Rodney James Whitby

The present invention relates to an image processor (,) comprising a control register block (,), a decoding block (,), a data object processor (,), and flow control logic. The control register block (,) stores all the relevant information about the image processing operation. The decoding block (,) decodes the information into configuration signals, which configure an input data object interface (,). The input data object interface (,) accepts and stores data objects from outside, and distributes these data objects to the data object processor (,). For some image processing operations, the input data object interface (,) may also generate addresses for data objects, so that the source of these data objects can provide the correct data objects. The data object processor (,) performs arithmetic operations on the data objects received. The flow control logic controls the flow of data objects within the data object processing logic (,). More particularly, the data object processor (,) can comprise a number of identical data object sub-processors, each of which processes part of an incoming data object.

General image processor

An apparatus and a method for performing discrete cosine transformation (DCT) are presented. The apparatus includes an arithmetic circuit interconnected with a transpose memory. The arithmetic circuit includes a combinatorial circuit for calculating a DCT without using an intermediate clocked storage unit. The combinatorial circuit includes a predetermined number of sequentially arranged stages for implementing the DCT. The apparatus may optionally include a controller for controlling operation of the apparatus and a multiplexer for multiplexing data input to the apparatus and data from the transpose memory. An apparatus and a method for performing inverse discrete cosine transformation (IDCT) are also presented.

Fast DCT apparatus

A color display system that is capable of taking input intended to be displayed on a full color display (e.g. VDU) having a high refresh rate and displaying the image on a display having a much reduced number of displayable colors and a lower refresh rate. 24-bit RGB data is input and converted into bi-level RGBW data and halftoned in a render unit for storage before display. Motion detection is used to ensure that only those pixels that have change in value are updated on the display.

Color display system

Display standards in common use for the display of computer or television images on high resolution displays, commonly assume that the output image will be displayed on an output device having a high refresh rate. A high refresh rate is normally required so the viewer does not observe flicker, stilted motion or other visual artifacts if a lower refresh rate were used. It is difficult to drive some displays at a high refresh rate. An apparatus is disclosed for detecting areas of an input image that are changing over time, even where the input image may be subject to some degree of noise. A priority value is determined for providing a measure of this change for use with a system to determine which areas of the image may need changing as a matter of high priority.

Motion detection method and apparatus

Display standards in common use for the display of computer or television images on high resolution displays commonly assume that the output image will be displayed on an output device having a high refresh rate. A high refresh rate is normally required so the viewer does not observe flicker, stilted motion or other visual artifacts that one might observe if a lower refresh rate were used. It is difficult to drive some displays at a high refresh rate. An apparatus is disclosed for detecting areas of an input image that are changing over time, even where the input image may be subject to some degree of noise. A priority value is determined for providing a measure of this change for use with a system to determine which areas of the image may need changing as a matter of high priority.

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Enmore, Australia

Mark Pulver