U.S. Philips Corporation

Koninklijke Philips Corporation N.V.

Geert Nijholt

Eric H Persoon

Rob Anne Beuker

Johannes A Bernsen

Hendrikus Hermanus Antonius Andreas Van Den Berg

Matrix display device ( ) wherein multiple line addressing is performed by a unit (LD). As a consequence of the multiple line addressing, there is a difference between the luminance values actually displayed (C) and the original luminance values (D). The visible effects of said difference or error (E) are minimized by subtracting said difference or part thereof from the original luminance values, either from neighbouring pixels to be displayed and/or from the same pixels of the subsequent frame. Said neighbouring pixels are preferably the pixels directly below or to the right of the ones considered. The latter is obtained by applying a sample delay to the error (E).

Matrix display device with reduced loss of resolution

An image processing pipeline system and method utilizes a cascade of data processing modules for processing a stream of pixel data units organized in successive groups, which are presented to the system input, the groups being separated from one another by time slots consisting of dead time intervals produced, for example, by line or frame fly-back. The modules are controlled by control signals produced by sampling circuit type characteristic circuits in response to control pulses from a control signal source. The control signals applied to the modules are in synchronism with the presence of data units at the system input, and are absent during the dead time intervals. In order to avoid loss of information due to processing delays if data transport between the modules takes place during an occurrence of a dead time interval, a monitoring circuit stops or pauses processing by the modules during that time interval of data units to reach the system input prior to the interval.

Pipeline system which pauses processing of already input data during

Method and apparatus for determining the presence of a predetermined pattern in a spatial field. The invention involves selecting a collection of amplitude values on the basis of location within a multivalued-amplitude field and arranging sequences of amplitude values in order of their magnitude. Amplitude values occurring at predetermined ranks are chosen as characteristic quantities representative of the portion of the field under consideration. By inter-relating a plurality of these characteristic quantities, pattern recognition is accomplished. Preferably rank value filters are employed for producing the characteristic quantities.

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Eindhoven, Netherlands

Geert Nijholt