Image analysis – Color image processing
Reexamination Certificate
1998-07-15
2001-07-17
Lee, Cheukfan (Department: 2722)
Image analysis
Color image processing
C382S260000
Reexamination Certificate
active
06263102
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a method of and a device for generating color and contour signals and to a camera comprising such a device.
SUMMARY OF THE INVENTION
It is, inter alia, an object of the invention to provide an economical color and contour signal generation. To this end, first and second aspects of the invention provide a method of and a device for generating output color signals and determining a contour signal from a sensor signal obtained by a sensor having a color filter with alternately colored filter elements. A third aspect of the invention provides a camera comprising a sensor having a color filter with alternately colored filter elements for generating a sensor signal, and the device as indicted above.
In accordance with a primary aspect of the present invention, a method of generating output color signals and determining a contour signal from a sensor signal obtained by a sensor having a color filter with alternately colored filter elements comprises the following steps: the sensor signal is delayed over at least one row (line) period; for each color, zero values are inserted at locations corresponding to the locations of differently colored filter elements; a plurality of mutually at least one row (line)-delayed color signals with inserted zeros is furnished; the plurality of mutually at least one row (line)-delayed color signals with inserted zeros is filtered to obtain the output color signals, and the plurality of mutually at least one row (line)-delayed color signals with inserted zeros is filtered to obtain the contour signal.
The invention yields the advantage that the row (line) memories which are used for color signal generation are also used for generating the contour signal, thus providing a very economical solution.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
REFERENCES:
patent: 4945406 (1990-07-01), Cok
patent: 5019895 (1991-05-01), Yamamoto
patent: 5333055 (1994-07-01), Murata
patent: 5612794 (1997-03-01), Brandestini
patent: 5614947 (1997-03-01), Tanizoe
Goodman Edward W.
Lee Cheukfan
U.S. Philips Corporation
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