Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1991-11-27

1992-07-21

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

G01C 300

Patent

active

051317400

ABSTRACT:
A distance measuring apparatus includes a pair of first and second image sensors, and a pair of first and second memories for successively storing a pair of first and second image signals output from the first and second image sensors. A CPU sets a window for the first image signal and compares a reference image signal within the window with the second image signal while shifting these signals relative to each other to thereby arithmetically measure a distance to the object. A window memory stores the reference image signal within the window. The CPU further compares the reference image signal within the window memory with first image signals stored in the first memory after a predetermined time, so as to find the most similar first image signal and set a provisional window enclosing it. Displacing the provisional window around it initially set position, the position of the window is updated only when the image signal within the provisional window as displaced exhibits a horizontal symmetry. Thus, the process and hence time for distance measurement can significantly be simplified and reduced while ensuring high accuracy and reliability.

REFERENCES:
patent: 4178098 (1979-12-01), Asano et al.
patent: 4589770 (1986-05-01), Jones et al.
patent: 4814810 (1989-03-01), Ishiguro

Affiliated with

Also associated with

Rating

Distance measuring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Distance measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance measuring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-839556