Abstract: Provided in the present invention is a repetitive fusion search method for a search system, in which: a search interface 20 displays parameter numerical value setting fields 25 for setting a numerical value for each of multiple instinct based feature parameters in order to input instinct based rating information, and a text input field 24 and a keyword selection field 26 for inputting keywords; and a search engine 13 searches, in response to search inputs input by a searcher using the search interface, a search target database 11 based on the keywords and extracts relevant targets, determines priority for the relevant targets based on the instinct based rating information, and transmits the relevant targets to the search interface 20.

Abstract: For a tracking of a target object in a time series of frames of image data, a tracking object designation acceptor accepts a designation of a tracking object, a target color setter sets a color of the designated tracking object as a target color, and a particle filter processor employs particles for measurements to determine color likelihoods by comparison between the target color and colors in vicinities of particles, works, as the color likelihoods meet a criterion, to estimate a region of the tracking object in a frame of image data in accordance with results of the measurements, and as the color likelihoods fails to meet the criterion, to use particles, for measurements to determine luminance likelihoods based on luminance differences between frames of image data in a time series of frames of image data, and estimate a region of the tracking object in a frame of image data in accordance with results of the measurements, and updates the target color by a color in either estimated region.

Abstract: For a tracking of a target object in a time series of frames of image data, a tracking object designation acceptor accepts a designation of a tracking object, a target color setter sets a color of the designated tracking object as a target color, and a particle filter processor employs particles for measurements to determine color likelihoods by comparison between the target color and colors in vicinities of particles, works, as the color likelihoods meet a criterion, to estimate a region of the tracking object in a frame of image data in accordance with results of the measurements, and as the color likelihoods fails to meet the criterion, to use particles, for measurements to determine luminance likelihoods based on luminance differences between frames of image data in a time series of frames of image data, and estimate a region of the tracking object in a frame of image data in accordance with results of the measurements, and updates the target color by a color in either estimated region.

Abstract: Provided in the present invention is a repetitive fusion search method for a search system, in which: a search interface 20 displays parameter numerical value setting fields 25 for setting a numerical value for each of multiple instinct based feature parameters in order to input instinct based rating information, and a text input field 24 and a keyword selection field 26 for inputting keywords; and a search engine 13 searches, in response to search inputs input by a searcher using the search interface, a search target database 11 based on the keywords and extracts relevant targets, determines priority for the relevant targets based on the instinct based rating information, and transmits the relevant targets to the search interface 20.

Abstract: Interference between adjacent sections is prevented in an optical wireless communication system, in which a center device is capable of concurrently communicating through lines with a plurality of parent devices each disposed in one of the sections into which a communication area of the system is divided and each of the parent devices communicates with a plurality of child devices disposed in the same section where said parent device is disposed. The sections is grouped into some groups of sections which do not adjoin each other. Optical wireless communications are done only within one group of sections in each communication period. Some techniques for improving the effect of communication are disclosed.