Borehole television, as one of investigation techniques with visual image, is used to investigate borehole walls as a continuous man-made outcrop, and to recognize in-situ rock mass conditions. It has been utilized as an useful method to analysis slope stability and to predict behavior of large rock cavern. Borehole image processing system(BIP System), as of the borehole television method, has been developed owing to the rapid advancement of microprocessors and other electronic devices,which can present images of borehole walls directly as digitized color signals at sites. This paper describes an unique technique of image processing in BIP System, and presents some case histories of detecting discontinuities in rock masses automatically using common method for image recognition.Future view of image processing technique for geological informations are also discussed.

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and Quaternary research, and proposes ways in which research should contribute to reducing disaster. It is concluded that a new approach is necessary in the search for a harmonious relationship between humankind and nature because the benefits pursued through current forms of development, if they are continued, will lead to increase incidence of slope disaster, resulting in gigantic construction costs.K iso-Jiban Consultants Co. Ltd., Kansai Geotechnical Center. 3-12-21, Tatsuno-minami, Sangou-cho, Ikoma, Nara, 636.

Framework of the present geological structure around Osaka was formed by the Quaternary tectonic move