Title:
APPARATUS FOR MEASURING CIRCUMFERENCE OF FIGURE
Document Type and Number:
WIPO Patent Application WO/1985/002252
Kind Code:
A1
Abstract:
This circumference measuring apparatus is capable of obtaining, with a simple calculation mechanism, the circumference of an approximation polygon of which each side is constituted by a variable-length line segment which conforms to the shape of an original figure. The profile of the original figure displayed on the screen of a display device is traced by a manually-operated profile tracing means. Variations in each of the components of two-dimensional coordinates on the display screen generated by the profile tracing means are calculated by counters. The contents of each of the counters are read and reset to zero by a circumference calculation circuit, every set period of time which is determined by the clock period. The length of each segment is calculated from the read-out counts, and the circumference of the original figure is obtained by totalling the lengths of the segments thus obtained.
Inventors:
HIROTA YUICHI (JP)
Application Number:
PCT/JP1984/000549
Publication Date:
May 23, 1985
Filing Date:
November 15, 1984
Export Citation:
Assignee:
YOKOGAWA MEDICAL SYST (JP)
International Classes:
G01B7/00; G01B7/02; G01B11/02; G01B11/24; G06F3/037; G06F3/041; G06F3/048; G06F3/0488; G06T7/60; G06T11/80; (IPC1-7): G01B11/03; G01B21/04
Foreign References:
| JPS5774609A | 1982-05-10 | |||
| JPS53128356A | 1978-11-09 | |||
| JPS58149581A | 1983-09-05 | |||
| US3541541A | 1970-11-17 | |||
| JPS5883869U | 1983-06-07 |
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