Dainippon Screen Mfg. Co., Ltd.

Ryuichi Miyazaki

Hidetoshi Nakanishi

Yasushi Doi

Hirokazu Takizawa

Kunio Yokoyama

Yosuke Kakihara

An upper search on data to be searched is performed with a different condition from partial matching of a character string, and data items narrowed down thereby are counted. Then, it is determined whether the number of items obtained by counting is not more than the predetermined number of searchable items by partial matching Ls, and in relation to search results, a lower search is performed by partial matching of the character string.

Method of searching data for a given character string

By comparing the density values of the pixels of a specific color separation image of an original comprising an objective image stored as data in an image memory with a threshold, determining a border line between the area of which density value is higher than the threshold and the area of which density value is lower than the threshold as the conclusive outline of the objective image, and by applying to both the areas distinct data respectively, an image extraction mask data is obtained to be stored into a mask memory.

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Kyoto, Japan

Ryuichi Miyazaki