CONVERSION OF A SUB-PIXEL FORMAT DATA TO ANOTHER SUB-PIXEL DATA FORMAT

• US 20070109330A1
• Filed: 10/11/2006
• Published: 05/17/2007
• Est. Priority Date: 05/09/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Clairvoyante, Inc. (Samsung Electronics Co. Ltd.)
• Inventors: Higgins, Michael, Brown Elliott, Candice
• Granted Patent: US 7,688,335 B2
• Time in Patent Office: Days
• US Class Current: 345/694
• CPC Class Codes: G06T 3/4015 Image demosaicing, e.g. colour filter arrays [CFA] or Bayer patterns
• CPC Class Codes: G06T 3/4069 by subpixel displacements
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 2340/0492 Change of orientation of the displayed image, e.g. upside-down, mirrored
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• 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

A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format is used for sub-pixel rendering an image on a display specified in a second sub-pixel format. Each of the first and second sub-pixel formats comprises a plurality of colored sub-pixels. The method comprises determining a geometric center of each colored sub-pixel of the first format to define a sampling point; and defining each implied sample area by forming lines that are substantially equidistant between the sampling point of one colored sub-pixel and the sampling point of another neighboring same color colored sub-pixel. A similar technique may be used for determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format.

Claims

1. A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format, for use in sub-pixel rendering an image on a display specified in a second sub-pixel format, each of said first and second sub-pixel formats comprising a plurality of colored sub-pixels, the method comprising:

determining a geometric center of each colored sub-pixel of said first format to define a sampling point; and

defining each said implied sample area by forming lines that are substantially equidistant between said sampling point of one said colored sub-pixel and said sampling point of another neighboring same color colored sub-pixel.

2. The method of claim 1, wherein said implied sample areas are disposed in a tiling pattern.

3. The method of claim 2, wherein said tiling pattern is one of the group comprising squares, rectangles, triangles, hexagons, octagons, diamonds, staggered squares, staggered rectangles, staggered triangles, Penrose tiles, rhombuses, distorted rhombuses, and staggered diamonds.

4. A method of determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format, the method comprising:

determining a geometric center of each colored sub-pixel of said second sub-pixel format to define a reconstruction point; and

defining each said resample area by forming lines that are equidistant between said reconstruction point of one colored sub-pixel and said reconstruction point of another neighboring same color colored sub-pixel.

5. The method of claim 4, wherein said resample areas are disposed in a tiling pattern.

6. The method of claim 5, wherein said tiling pattern is one of the group comprising squares, rectangles, triangles, hexagons, octagons, diamonds, staggered squares, staggered rectangles, staggered triangles, Penrose tiles, rhombuses, distorted rhombuses, and staggered diamonds.