Apparatus and method for image-processing, and display apparatus

• US 20050083355A1
• Filed: 10/14/2004
• Published: 04/21/2005
• Est. Priority Date: 10/17/2003
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nagata, Mitsutoshi, Tezuka, Tadanori, Toji, Bunpei, Nakahigashi, Hideto
• Application Number:
  US10/963,807
• Publication Number:
  US 20050083355A1
• Time in Patent Office: Days
• US Class Current: 345/694
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 3/403 Edge-driven scaling; Edge-based scaling
• CPC Class Codes: G06T 5/003 Deblurring; Sharpening vibration or motion blur correction for cameras comprising an electronic image sensor H04N23/682
• CPC Class Codes: G06T 5/20 using local operators
• CPC Class Codes: G06T 5/73 Deblurring; Sharpening
• 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

Abstract

An interpolation unit converts an inputted image with pixel precision into an interpolated image with sub-pixel precision. A brightness/chroma-decomposing unit decomposes the interpolated image into brightness components with sub-pixel precision and the other. An image-processing unit emphasizes components belonging to a specific frequency band of the decomposed brightness components. Edges neither enlarge nor look jaggy. A display result with rich clearness and high quality is obtained.

Claims

1. An image-processing apparatus operable to process a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device, the image-processing apparatus comprising:

an image-processing unit operable to emphasize components belonging to a specific frequency band of an inputted sub-pixel precision image to generate an emphasized sub-pixel precision image.

5. The image-processing apparatus as claimed in claim 1, wherein the one pixel of the display device is composed of a sub-pixel corresponding to a red light-emitting element, a sub-pixel corresponding to a green light-emitting element, and a sub-pixel corresponding to a blue light-emitting element.

2. An image-processing apparatus operable to process a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device, the image-processing apparatus comprising:

an interpolation unit operable to convert a pixel precision inputted image to a sub-pixel precision interpolated image;

a brightness/chroma-decomposing unit operable to decompose the sub-pixel precision interpolated image into sub-pixel precision brightness components and the other; and

an image-processing unit operable to emphasize components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image.

6. The image-processing apparatus as claimed in claim 2, wherein said interpolation unit is operable to convert a pixel precision inputted image to a sub-pixel precision interpolated image, based on pattern matching using a pattern defined according to an illuminant state of a target pixel and pixels adjacent to the target pixel.

7. The image-processing apparatus as claimed in claim 2, wherein said interpolation unit copies data of the pixel precision inputted image a number of times to generate the sub-pixel precision interpolated image, the number being equal to a number of the plurality of light-emitting elements comprising the one pixel of the display device.

8. The image-processing apparatus as claimed in claim 7, wherein said interpolation unit comprises a low-pass filter operable to remove high frequency components from the sub-pixel precision interpolated image.

12. The image-processing apparatus as claimed in claim 2, wherein said image-processing unit performs in parallel processes thereof, amount of processes of said image-processing unit being first amount in a unit time,

wherein said interpolation unit performs processes thereof, amount of processes of said interpolation unit being second amount in the unit time, and

wherein the first amount is not less than the second amount multiplied by a number of the plurality of light-emitting elements comprising the one pixel of the display device.

3. An image-processing apparatus operable to process a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device, the image-processing apparatus comprising:

an interpolation unit operable to convert a pixel precision inputted image to a sub-pixel precision interpolated image, the pixel precision inputted image being one of a black-and-white binary image and a gray scale image; and

an image-processing unit operable to emphasize components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image.

4. An image-processing apparatus operable to process a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device, the image-processing apparatus comprising:

an interpolation unit operable to convert a pixel precision inputted image to a sub-pixel precision interpolated image;

an image-processing unit operable to emphasize components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image; and

a sub-pixel-rendering-processing unit operable to perform sub-pixel-rendering-processes for the emphasized sub-pixel precision image to generate a display image.

9. The image-processing apparatus as claimed in claim 4, wherein said sub-pixel-rendering-processing unit comprises:

a brightness/chroma-decomposing unit operable to decompose the emphasized sub-pixel precision image into sub-pixel precision brightness components and sub-pixel precision chroma components;

a color fringe-reducing unit operable to perform filtering processes for the sub-pixel brightness components to output filtered sub-pixel brightness components as a first result, the filtering processes reducing color fringes when the filtered sub-pixel brightness components is displayed;

a chroma-processing unit operable to process the sub-pixel precision chroma components to output processed sub-pixel precision chroma components as a second result; and

a display image-generating unit operable to generate a display image based on the first result and the second result.

10. The image-processing apparatus as claimed in claim 4, wherein said image-processing unit comprises:

a high-pass filter operable to extract sub-pixel precision high frequency components from the sub-pixel precision interpolated image;

a multiplier operable to multiply the sub-pixel precision high frequency components by a multiple of a gain to generate sub-pixel precision emphasized components; and

an adder operable to add the sub-pixel precision emphasized components to the sub-pixel precision interpolated image to generate the emphasized sub-pixel precision image.

11. The image-processing apparatus as claimed in claim 10, wherein said image-processing unit further comprises a waveform-shaping unit operable to shape waveform of the sub-pixel precision high frequency components into a predetermined range to generate shaped sub-pixel precision high frequency components, and

wherein the gain is adjusted according to the shaped sub-pixel precision high frequency components.

13. A display apparatus comprising:

an image-processing apparatus;

a display device; and

a driver,

wherein said image-processing apparatus is operable to process a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of said display device,

wherein said image-processing apparatus comprises an image-processing unit operable to emphasize components belonging to a specific frequency band of an inputted sub-pixel precision image to generate an emphasized sub-pixel precision image, and

wherein said driver controls said display device according to the emphasized sub-pixel precision image generated by said image-processing apparatus.

14. An image-processing method comprising:

processing a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device; and

emphasizing components belonging to a specific frequency band of an inputted sub-pixel precision image to generate an emphasized sub-pixel precision image.

15. An image-processing method comprising:

processing a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device;

converting a pixel precision inputted image to a sub-pixel precision interpolated image;

decomposing the sub-pixel precision interpolated image into sub-pixel precision brightness components and the other; and

emphasizing components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image.

16. An image-processing method comprising:

processing a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device;

converting a pixel precision inputted image to a sub-pixel precision interpolated image, the pixel precision inputted image being one of a black-and-white binary image and a gray scale image; and

emphasizing components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image.

17. An image-processing method comprising:

processing a sub-pixel precision image that possesses precision corresponding to one of a plurality of light-emitting elements, the plurality of light-emitting elements comprising one pixel of a display device;

converting a pixel precision inputted image to a sub-pixel precision interpolated image;

emphasizing components belonging to a specific frequency band of the sub-pixel precision interpolated image to generate an emphasized sub-pixel precision image; and

performing sub-pixel-rendering-processes for the emphasized sub-pixel precision image to generate a display image.