Abstract: A method and apparatus are provided that determine the suitability of an image for use by an object tracking system. According to one embodiment of the present invention an image is preprocessed to separate one or more objects to be tracked from the rest of the image and compute statistics for the one or more objects to be tracked and the rest of the image. A quality measure is generated based on the statistics for the one or more objects to be tracked and the rest of the image that indicates the suitability of the image for use by an object tracking system.

Abstract: A switch mode electrical power controller arranged to provide a width modulated output pulse signal in response to a control input signal representing a parameter controlled by the power controller, in which a signal processing network for generating the width modulated waveform is arranged to execute all its operations in parallel. The performance, in parallel, of the operations required for the generation of the output signal minimizes the delay along a critical signal path and facilitates high frequency operation.

Abstract: An energy transfer arrangement in which a primary network transfers controlled quantities of energy to a secondary network. The primary network signals to the secondary network when it is about to initiate energy transfer and then initiates energy transfer until the secondary network responds to indicate to the primary network that energy transfer is to be terminated. The secondary network delays sending the primary network a termination signal for a period of time until the primary network is ready to receive the termination signal. The sequence of the primary network signalling the start of energy transfer, the primary network transferring energy, and the secondary network signalling the termination of energy transfer, is repeated indefinitely.