Vehicle detecting method and apparatus performing binary-convers

Details Vehicle detecting method and apparatus performing binary-convers Vehicle detecting method and apparatus performing binary-convers

1991-10-03

1993-09-07

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 48, 358108, 3409322, 340937, G06K 900

Patent

active

052436632

ABSTRACT:
A vehicle detecting apparatus for detecting a vehicle in each vehicle existence judging region based on binary pixel data, wherein a luminance level at which a variance of luminance of pixels in each vehicle existence judging region takes a maximum value is calculated to thereby perform a vehicle detection by utilizing a change appearing in the variance of luminance in the vehicle existence judging region, where the change is caused by a quite small number of pixels in the vehicle existence judging region having luminance levels lower than a lower threshold value or higher than an upper threshold value, even if the majority of the pixels in the vehicle existence judging region have a luminance close to that of a road surface.

REFERENCES:
patent: 4160998 (1979-07-01), Kamin
patent: 4845761 (1989-07-01), Cate et al.
patent: 4947353 (1990-08-01), Quinlan, Jr.

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