Pixel patterns

• US 20070171290A1
• Filed: 04/30/2004
• Published: 07/26/2007
• Est. Priority Date: 05/08/2003
• Status: Abandoned Application

• Current Assignee: Transpacific Intelligence, LLC
• Original Assignee: Transpacific Intelligence, LLC
• Inventors: Kroger, Ronald
• Application Number:
  US10/555,909
• Publication Number:
  US 20070171290A1
• Time in Patent Office: Days
• US Class Current: 348/272
• CPC Class Codes: G06T 3/4015 Image demosaicing, e.g. colour filter arrays [CFA] or Bayer patterns
• 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 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

The invention discloses an array of pixels to be arranged in electronic color imaging devices, where the risk of aliasing is reduced by arranging the pixels in the array according to irregular patterns. The array is provided with a first, a second and a third set of pixels representing a first, a second and a third color respectively. The pixels in the first set of pixels and/or the pixels in the second set of pixels are arranged in at least a first spatial frequency, and the pixels in the third set of pixels are arranged in at least a second spatial frequency. In addition, one of said first or second set of pixels may be arranged in at least a third spatial frequency. None of said first, second and third spatial frequencies are harmonics of each other. The array may be implemented in one or several different matrixes of pixels.

Claims

1. An array of pixels, wherein at least a first set of pixels represents a first colour, a second set of pixels represents a second colour and a third set of pixels represents a third colour,

wherein:

the pixels in at least one of said first set of pixels representing a first colour or said second set of pixels representing a second colour are arranged in at least a first spatial frequency;

the pixels in said third set of pixels representing a third colour are arranged in at least a second spatial frequency;

none of said first and said at second frequencies are harmonics of each other.

2. An array of pixels according to claim 1,

wherein:

the pixels in one of said first set of pixels or said second set of pixels are arranged in at least a third spatial frequency, where none of said first, second or third frequencies are harmonics of each other.

3. An array of pixels according to claim 1, where said pixels are arranged in at least one matrix of pixels, wherein at least a subset of said first set of pixels has a first size, and at least a subset of said second set of pixels or at least a subset of said third set of pixels has a second size,

wherein:

at least some pixels constitute double pixels comprising at least two pixels, where each pixel 4 is selected from one, but not the same, of said first, second or third sets of pixels;

at least a first subset of double pixels is arranged in an angle with respect to at least a second subset of double pixels.

4. An array of pixels according to claim 3

wherein;

at least a subset of said second set of pixels or least a subset of said third set of pixel has a third size.

5. An array of pixels according to claim 3

wherein:

pixels in said first, second or third sets of pixels occur in a substantially equal quantity.

6. An array of pixels according to claim 3

wherein:

pixels in two of said first, second or third sets of pixels occur in a substantially equal first quantity, whereas pixels in the remaining of said first, second or third sets of pixels occur in a second higher or lower quantity.

7. An array of pixels according to claim 3

wherein:

pixels in said first set, second and third sets of pixels occur in a first, a second and a third quantity respectively, where each single quantity differs from the two other.

8. An array of pixels according to claim 3

wherein:

the array is skewed.

9. An array of pixels according to claim 3

wherein:

activation of the first pixel in a double pixel leads to some activation of the second pixel in the double pixel.

10. An array of pixels according to claim 1

wherein:

at least a subset of one of said first, second or third sets of pixels has a first shape and at least a subset of another of said first, second or third set of pixels has a second shape.

11. An array of pixels according to claim 10

wherein:

at least a subset of any of said first, second or third sets of pixels has a third shape.

12. An array of pixels according to claim 10

wherein:

at least one of said first, second and third shape is similar to at least one of a circle, sector of a circle, segment of a circle, half-circle, ellipse, segment of a parabola, triangle, quadrate, rhomb, trapezoid, pentagon, hexagon, octagon.

13. An array of pixels according to claim 1, where said pixels are arranged in three separate matrixes of pixels, where

the pixels representing a first colour are arranged in a first matrix,

the pixels representing a second colour are arranged in second matrix,

the pixels representing a third colour are arranged in third matrix,

wherein:

said first matrix is shifted compared to said second matrix and said third matrix.

14. An array of pixels according to claim 13

wherein:

said second matrix and said third matrix is shifted compared to each other.

15. An array of pixels according to claim 13

wherein:

said shifting is accomplished in that said first matrix is arranged at a first angle, and one of said second matrix or said third matrix is arranged at a second angle.

16. An array of pixels according to claim 15

wherein:

one of said second matrix or said third matrix is arranged at a third angle.

17. An array of pixels according to claim 13

wherein:

said shifting is accomplished by said first matrix having pixels arranged in a first pattern and one of said second matrix or said third matrix having pixels arranged in a second pattern.

18. An array of pixels according to claim 17

wherein:

one of said second matrix or said third matrix having pixels arranged in a third pattern.

19. An array of pixels according to claim 1,

wherein:

said first colour is a red colour, said second colour is a green colour and said third colour is a blue colour.

20. An electronic imaging device comprising an array of pixels according to claim 1.

21. An electronic imaging device according to claim 20

wherein:

the device is an electronic camera, an image scanner, a data monitor, a television monitor, a video projector, a data projector or a photocopying machine.