Distance measurement device

Details Distance measurement device Distance measurement device

1998-05-11

1999-11-16

Kim, Robert H.

Optics: measuring and testing

By configuration comparison

With two images of single article compared

356390, 356388, 356338, G02B 2106

Patent

active

059867647

ABSTRACT:
A distance measurement device of the present invention detects a subject image with separation from the background and determines the distance to the subject regardless of backlit or forelit situations. In the distance measurement device, the subject is imaged onto two sensor arrays through different optical paths having parallax. The displacement of one of image signals output from the sensor arrays relative to the other is detected to determine the distance to the subject. On the basis of output signals of the sensor arrays, an object detector unit in a CPU determines a main area in the entire area of each sensor array which is occupied by the main subject image. On the basis of output signals from the main area in each sensor array detected by the object detector unit, a correlation operation unit calculates the displacement of the subject image on one sensor array relative to the subject image on the other sensor array.

REFERENCES:
patent: 5068682 (1991-11-01), Utagawa
patent: 5138357 (1992-08-01), Utagawa
patent: 5293428 (1994-03-01), Kondou et al.
patent: 5602944 (1997-02-01), Yokoyama et al.

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