Title:
BORED WALL SURFACE OBSERVATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/1997/044958
Kind Code:
A1
Abstract:
An apparatus for displaying an all-around development image of a bored wall surface not only by a still image but also by a dynamic image by carrying out coordinate transformation at a high speed when the wall surface of a hole made by boring or a hole through which underground water flows is photographed and then developed into an all-around image. The digitalized image data are stored in each frame of an image memory by a memory data controller, and the data in odd-number fields and even-number fields of the image memory are read out alternately many times at a rate of 60 fields per second by a read memory address controller in accordance with vertical and horizontal synchronizing signals. During this time, the image data are read spirally by controlling a coordinate transformation table with reference to the directional data on the photographed image outputted from a direction indicator. The image data developed into a square diagram are converted into analog signals by a D/A converter, and picture signals are outputted through a RGB matrix circuit.
Inventors:
MATSUMOTO YOSHITAKA (JP)
MURAKAMI OSAMU (JP)
MURAKAMI OSAMU (JP)
Application Number:
PCT/JP1997/001719
Publication Date:
November 27, 1997
Filing Date:
May 22, 1997
Export Citation:
Assignee:
CORE CORP (JP)
MATSUMOTO YOSHITAKA (JP)
MURAKAMI OSAMU (JP)
MATSUMOTO YOSHITAKA (JP)
MURAKAMI OSAMU (JP)
International Classes:
E21B49/00; G02B23/24; G03B15/00; H04N7/18; (IPC1-7): H04N7/18
Foreign References:
| JPH06292204A | 1994-10-18 | |||
| JPS62198272A | 1987-09-01 | |||
| JPH04368594A | 1992-12-21 |
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