An imaging mirror (608) focuses this distribution to a ring-field arc (610) at the mask plane.

Each stripe (310) is decomposed (450) into foreground (120), background (130), and mask (140) layers.

The masking area of the mask pattern has a first masking portion and a second masking portion, wherein the first masking portion and the second masking portion may contain different materials.

The mask value is utilized to generate a write mask command.

A digital image compositing system (20) has background, foreground, key and mask busses (22, 24, 26 and 28).

The mask value is generated and stored in a mask array.

Objects of interest may be identified by filtering out large objects and optionally by masking out background regions.

A mask generator is provided to partially decode a mask amount from the currently executed control instruction and masking logic is provided with additional decoding logic to complete the mask amount decode.

This masking complements and enhances the natural masking inherent in the use of Montgomery arithmetic.

A pad of such tape masking articles and a method of masking a door hinge using the tape masking articles are also described.

The destination B removes the blinding, preferably on the basis of blinding information of the user.

Use keying effects to remove a background, or use rotoscoping and masking tools to isolate any object.

The autocovariance data of the shadowing signal may comprises an autocorrelation function governing self-correlation of the shadowing signal or de-correlation time of the shadowing signal.

The masking circuitry (18) further comprises decompression circuitry for receiving compressed mask data and providing decompressed mask data.

A representative masking stack having a length and width includes a plurality of masking apparatuses.