Imaging apparatus having a detector for determining the presence

Details Imaging apparatus having a detector for determining the presence Imaging apparatus having a detector for determining the presence

1989-04-07

1992-11-10

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 10, G06K 900

Patent

active

051630990

ABSTRACT:
An imaging apparatus includes an imaging device, a transformer and a detecting device. The imaging device generates image signals corresponding to the appearance of a physical object which includes contrasting portions. The transformer transforms the image signals into a power spectrum signal having a signal level which varies in relation to the contrasting portions in the appearance of the object at a specified time. The transformation to a power spectrum signal may be performed by adding the image signals and then perform Fourier transformation on the resultant sum, or by performing Fourier transformation on each image signal and summing the respective transforms of the image signals.

REFERENCES:
patent: 4912770 (1990-03-01), Sato et al.
Rosenfeld and Avinash C. Kak, Digital Picture Processing 1982 p. 251 Second Edition vol. 1 Academic Press.

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