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Apparatus and method for generating wide colour gamut signal in image capturing device

An image capture device, image signal technology, applied in the field of image capture

Inactive Publication Date: 2008-10-15
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also a problem with the prior art that more interpolation processing operations are required due to signals with negative values

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  • Apparatus and method for generating wide colour gamut signal in image capturing device
  • Apparatus and method for generating wide colour gamut signal in image capturing device

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Embodiment Construction

[0022] The accompanying drawings illustrate typical embodiments of the invention and are referred to in order to obtain a full understanding of the invention, its advantages and objects.

[0023] FIG. 2 is a block diagram of an apparatus for generating a wide color gamut signal in an image capture device according to an embodiment of the present invention.

[0024] The device includes an image pickup unit 210 , a gamma correction unit 220 , an interpolation unit 230 , a color gamut conversion unit 240 , a color gamut extension unit 250 and a signal correction unit 260 . In addition, as an optional component, the image capture device further includes a correction gain generation unit 270 .

[0025] The image pickup unit 210 converts an input image into RGB signals having linear characteristics by using a pickup device, such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) sensor.

[0026] The gamma correction unit 220 receives RGB signals ha...

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Abstract

Provided are a method and apparatus for generating a wide color gamut signal in an image capturing device, which can simplify a calculation process and minimize color distortion therein. The apparatus includes a gamma-correction unit (220) gamma-correcting a picked-up image signal by using gamma curve information predetermined according to an output format; an interpolation unit (230) interpolating the gamma-corrected image signal as a linear image signal which is to be expressed on a display; a color gamut conversion unit (240) converting the interpolated image signal into a standard RGB signal by using a color conversion matrix; a color expansion unit (250) expanding the standard RGB signal to a wide color gamut signal by using a gamut conversion matrix; and a signal correction unit (260) correcting the wide color gamut signal by a predetermined correction gain value.

Description

[0001] Cross references to related patent applications [0002] This application claims priority from Korean Patent Application No. 10-2007-0036176 filed in the Korean Intellectual Property Office on Apr. 12, 2007, the contents of which are incorporated herein by reference in their entirety. technical field [0003] Apparatuses and methods according to the present invention relate to image capturing, and more particularly to generating wide color gamut signals that simplify calculations and minimize color distortion therein. Background technique [0004] Generally, image capture devices are devices such as camcorders and still cameras (or video cameras). A color signal having a BT.601 component or a YCbCr component has a color reproduction rate of about 1 / 3 of a human-recognizable color gamut. As image capture devices improve, multimedia output devices become capable of picking up signals in a wider color gamut than the conventional YCbCr color gamut. [0005] When an imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/04H04N9/69H04N23/12
CPCH04N9/64H04N9/045H04N9/69H04N23/841H04N23/843H04N25/134H04N23/84H04N23/83H04N23/12
Inventor 李昌优金文喆申允澈
Owner SAMSUNG ELECTRONICS CO LTD
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