Quantel Limited

Adam R Rae-Smith

Paul R Kellar

Brian Robert Nonweiler

Colin John Wrey

Matthew Sumner

John Kenneth Cordery

An image processing system,is arranged to produce data representing a combined image from foreground data F representing a foreground subject in front of a chroma backing and background data B representing a background image. The foreground data is processed and color corrected to produce first and second processed foreground data which is combined in a combiner,under the control of a first key K,. The background data is processed using a second key K,to &ldquo;cut&rdquo; a &ldquo;hole&rdquo; in the background image. The processed background data and the combined foreground data are added together in an adder,A third key K,is used to remove unwanted data from the added foreground and background data and to combine the resulting data with the processed background data in a combiner

Image processing system

An electronic graphic system comprises an image store for storing data defining an image, a brush store for storing data defining a drawing implement and a stylus and touch tablet for inputting position data and other data. A spatial filter is arranged to respond to the data from the stylus and touch tablet device to filter the brush data to produce brush data defining a drawing implement of a size depending on the data from the stylus and touch tablet device. The filtered brush data is used by a drawing processor to process data in the image store.

Electronic graphic system

Features in an image being modified can be expanded or contracted under the control of the user. The expansion and contraction are both executed by offsetting image data and then writing the offset data to a store where it is combined by a weighted summation with data previously stored therein. This operation is repeated for different offsets. The effect of the weighted summation is also to add soft edges to features in the picture and the system may therefore be used to soften control images.

Improvements in or relating to electronic graphic systems

A processing system and method which produces and manipulates images of a three dimensional object. Patches of video signals (called cameos) representing different parallel planes of an object are stored in a frame store from which each cameo can be accessed individually and manipulated as desired. When the effect of a change in orientation or position of the object is required in the output image each cameo is accessed and manipulated in the same manner and combined using key and priority signals. The manipulation is achieved by writing incoming video signals into addresses in a store determined by the manipulation required and provided as address maps. The medical embodiment replaces the cameos with frames of signals representing tomographic sections of a patient and uses a LUT to provide a window for certain ranges of signals.

Image processing systems and methods

Video signals from radiography equipment (14) are converted to digital form and transferred via a buffer store, (2) to a parallel transfer disc store (3) in real time. These signals can then be read, out again in real time, to a video processor (6) and frame store (8) to provide image enhancement. The enhanced image can then be converted to analog form and displayed on display means (13). The parallel transfer mode of operation of the disc store (3) enables the video signals to be stored in real time. A computer (7) provides control signals to the system.

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Newbury, United Kingdom

Adam R Rae-Smith