Color management module, color management apparatus, integrated circuit, display unit, and method of color management

• US 8,212,836 B2
• Filed: 12/14/2009
• Issued: 07/03/2012
• Est. Priority Date: 02/15/2008
• Status: Expired due to Fees

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Inoe, Masanobu, Hitomi, Hisakazu, Matsumoto, Keizo
• Primary Examiner(s): Sajous, Wesner
• Application Number:
  US12/637,210
• Publication Number:
  US 20100091034A1
• Time in Patent Office: 932 Days
• Field of Search: 345/419, 345/581, 345589-591, 345600-602, 345604-606, 345519-520, 345/549, 345/204, 348253-254, 348/557, 348/582, 348/599, 348/674, 382/162, 382/167, 382/254, 382/274, 358518-519, 358523-525
• US Class Current: 345/601
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 1/6019 using look-up tables H04N1/6025 takes precedence
• CPC Class Codes: H04N 1/603 controlled by characteristics of the picture signal generator or the picture reproducer
• CPC Class Codes: H04N 9/646 for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
• CPC Class Codes: H04N 9/67 for matrixing camera processing pipelines for matrixing of colour signals H04N23/85

Abstract

The color management module includes a first color converter color-converting color information contained in an image signal having been input according to a three-dimensional LUT; an interpolator generating a synthetic image signal by synthesizing an image signal converted by the first color converter and an image signal having been input in an arbitrary ratio; and a second color converter color-converting color information on the synthetic image signal in the HSV space and outputting the color information.

Claims

1. A color management module comprising:

a first color converter converting color information contained in an input image signal;

an interpolator outputting a synthetic image signal utilizing an output from at least one of the first color converter and the input image signal;

a second color converter converting color information contained in the synthetic image signal and outputting an image signal;

an image feature detector detecting a feature of the input image signal; and

an image adaptive interlocking controller controlling at least one of the interpolator and the second color converter according to the feature.

2. The color management module of claim 1, wherein the first color converter includes a multidimensional look-up table.

3. The color management module of claim 2, wherein the second color converter converts color in a color space comprising hue, chroma, and lightness.

4. The color management module of claim 2, further comprising:

a look-up table controller for changing data in the multidimensional look-up table.

5. The color management module of claim 1, wherein the image adaptive interlocking controller receives extraneous control information, and controls at least one of the interpolator and the second color converter according to the extraneous control information and the feature.

6. The color management module of claim 5, wherein the image adaptive interlocking controller determines a ratio of synthesizing an image signal in the interpolator according to the extraneous control information.

7. The color management module of claim 5,

wherein the extraneous control information includes information on external light;

and

wherein the information on the external light is an illuminance level.

8. The color management module of claim 1,

wherein the image feature detector detects a magnitude of a change of the input image signal between successive screens, and

wherein the image adaptive interlocking controller controls the interpolator to weaken a ratio of synthesizing an image signal converted by the first color converter when the magnitude of a change is within a given range.

9. The color management module of claim 1,

wherein the image feature detector detects at least one of a signal level and occurrence frequency, in color information of the input image signal, and

wherein the image adaptive interlocking controller controls the interpolator to weaken a ratio of synthesizing an image signal converted by the first color converter when at least one of the signal level and the occurrence frequency is within a given range.

10. The color management module of claim 4, wherein the look-up table controller changes part of data in the multidimensional look-up table.

11. A color management module comprising:

a first color converter converting color information contained in an input image signal by using a first multidimensional look-up table;

a second color converter converting color information contained in the input image signal by using a second multidimensional look-up table;

an interpolator generating a synthetic image signal utilizing at least one of image signals output from the first color converter and image signals output from the second color converter; and

a third color converter converting the color information contained in the synthetic image signal and outputting the color information.

12. A color management apparatus comprising a color management module,

the color management module comprising:

a first color converter converting color information contained in an input image signal;

an interpolator generating a synthetic image signal utilizing at least one of an output from the first color converter and the input image signal;

a second color converter converting color information contained in the synthetic image signal and outputting the color information;

an image feature detector detecting a feature of the input image signal; and

an image adaptive interlocking controller controlling at least one of the interpolator and the second color converter according to the feature.

13. An integrated circuit comprising a color management module,

the color management module comprising:

a first color converter converting color information contained in an input image signal;

an interpolator generating a synthetic image signal utilizing at least one of an output from the first color converter and the input image signal;

a second color converter converting color information contained in the synthetic image signal and outputting the color information;

an image feature detector detecting a feature of the input image signal; and

an image adaptive interlocking controller controlling at least one of the interpolator and the second color converter according to the feature.

14. A display unit comprising:

a color management module; and

a display device displaying an image signal from a second color converter,

wherein the color management module comprises;

a first color converter converting color information contained in an input image signal;

an interpolator generating a synthetic image signal utilizing at least one of an output from the first color converter and the input image signal;

the second color converter converting color information contained in the synthetic image signal and outputting the color information;

an image feature detector detecting a feature of the input image signal; and

an image adaptive interlocking controller controlling at least one of the interpolator and the second color converter according to the feature.

15. A method of color management comprising:

a first color conversion step converting color information contained in an input image signal;

an interpolation step generating a synthetic image signal utilizing at least one of an image signal converted in the first color conversion step and the image signal having been input;

a second color conversion step converting the color information contained in the synthetic image signal and outputting the color information;

an image feature detecting step detecting a feature of the input image signal by an image feature detector; and

an image adaptive interlocking controlling step controlling at least one process of the interpolation step and the second color conversion step according to the feature.

16. The method of color management of claim 15, wherein the first color conversion step is converting color according to a multidimensional look-up table.

17. The method of color management of claim 16, wherein the second color conversion step is converting color in a color space comprising hue, chroma, and lightness.

18. The method of color management of claim 16, further comprising:

a look-up table controlling step changing data in the multidimensional look-up table.

19. The method of color management of claim 15, wherein the image adaptive interlocking controlling step receives extraneous control information, and controls at least one process of the interpolation step and the second color conversion step according to the extraneous control information and the feature.

20. The method of color management of claim 19, wherein the image adaptive interlocking controlling step determines the ratio according to the extraneous control information.

21. The method of color management of claim 19,

wherein the extraneous control information is a signal representing information on external light:

and

wherein the information on the external light is an illuminance level.

22. The method of color management of claim 15,

wherein the image feature detecting step detects the magnitude of a change of an input image signal between successive screens;

and

wherein the image adaptive interlocking controlling step controls the interpolator to weaken a ratio of synthesizing an image signal converted in the first color conversion step when the magnitude of a change is within a given range.

23. The method of color management of claim 15,

wherein the image feature detecting step detects a signal level and occurrence frequency, in the color information of an input image signal, and

wherein the image adaptive interlocking controlling step controls the interpolation step to weaken a ratio of synthesizing an image signal converted in the first color conversion step when at least one of a signal level and occurrence frequency is within a given range.

24. The method of color management of claim 18, wherein the look-up table controlling step changes part of data in the multidimensional look-up table.