Image analysis – Color image processing – Compression of color images
Reexamination Certificate
1997-12-05
2001-07-10
Grant, II, Jerome (Department: 2624)
Image analysis
Color image processing
Compression of color images
C358S530000, C358S518000, C382S167000, C382S232000
Reexamination Certificate
active
06259811
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an image processing apparatus and method for performing a color space compression.
2. Related Background Art
In recent years, there has been considered a color space compressing technique for converting an input color signal to an optimum color signal within a color reconstructing range in which an original expressed by the input color signal including a signal out of a color reconstructing range of an output device can be reconstructed by the output device.
According to the conventional color space compressing technique, however, a color space compression based on an input image cannot be performed.
There is, consequently, a problem such that, for example, in spite of the fact that a color space compressing process has been performed by a host apparatus, the color space compressing process is again executed by an image processing apparatus and it takes a long processing time than it is needed or a reproduction image deteriorates.
SUMMARY OF THE INVENTION
It is an object of the invention to provide image processing apparatus and method which can select whether a color space compression is executed or not on the basis of input image data.
Another object of the invention is that a color space compression is performed to an image signal obtained by scanning an original and a color space compression is not executed to an image signal from an external apparatus, thereby preventing that a color space compressing process is executed to the same image a plurality of number of times.
To accomplish the above objects, according to a preferred embodiment of the invention, there is provided an image processing apparatus comprising: input means for inputting image data; setting means for setting a color space compression processing mode on the basis of a kind of signal format of the inputted image data; and color space compression processing means for performing a color space compressing process to the inputted image data on the basis of the set color space compression processing mode, wherein the color space compression processing mode has a first mode in which a color space compression is performed and a second mode in which the color space compression is not performed.
The above and other objects and features of the present invention will become apparent from the following detailed description and the appended claims with reference to the accompanying drawings.
REFERENCES:
patent: 4931860 (1990-06-01), Narumiya
patent: 5268753 (1993-12-01), Yamaguchi
patent: 5606428 (1997-02-01), Hanselman
patent: WO 92/06557 (1992-04-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Grant II Jerome
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