IMAGE PROCESSING DEVICE, IMAGE DISPLAY APPARATUS, AND IMAGE PROCESSING METHOD

• US 20090244088A1
• Filed: 03/19/2009
• Published: 10/01/2009
• Est. Priority Date: 03/27/2008
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: HASEGAWA, Hiroshi, ARAGAKI, Takumi
• Granted Patent: US 8,248,434 B2
• Time in Patent Office: Days
• US Class Current: 345/613
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/3185 Geometric adjustment, e.g. keystone or convergence optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

An image processing device adapted to correct a pixel value corresponding to a sub-pixel constituting a pixel includes a displacement amount storage section adapted to store a displacement amount of a display position of a display sub-pixel corresponding to the sub-pixel constituting a display pixel in a reference position in a display image plane, and a pixel value correction section adapted to correct the pixel value of the sub-pixel corresponding to the display sub-pixel at an end of the display image plane in accordance with the displacement amount stored in the displacement amount storage section.

Claims

1. An image processing device adapted to correct a pixel value corresponding to a sub-pixel constituting a pixel, comprising:

a displacement amount storage section adapted to store a displacement amount of a display position of a display sub-pixel corresponding to a sub-pixel constituting a display pixel in a reference position in a display image plane; and

a pixel value correction section adapted to correct the pixel value of the sub-pixel corresponding to the display sub-pixel at an end of the display image plane in accordance with the displacement amount stored in the displacement amount storage section.

2. The image processing device according to claim 1, wherein

the displacement amount storage section stores the displacement amounts of the display positions of the display sub-pixels at a plurality of reference positions in the display image plane, and

the pixel value correction section calculates the displacement amount of the display position of the display sub-pixel at the end by interpolating the displacement amounts of the display positions of the display sub-pixels in a plurality of reference positions stored in the displacement amount storage section, and then corrects the pixel value of the sub-pixel corresponding to the display sub-pixel at the end in accordance with the displacement amount.

3. The image processing device according to claim 1, wherein

the pixel value correction section includes

a reference display sub-pixel selection section adapted to /select. as a reference display sub-pixel, the display sub-pixel nearest to a center of the display image plane in a given direction among a plurality of display sub-pixels constituting the display pixels at the end,

a display sub-pixel displacement amount calculation section adapted to calculate the displacement amounts of the remaining display sub-pixels except the reference display sub-pixel among the plurality of display sub-pixel, based on the displacement amount stored in the displacement amount storage section, and taking the display position of the reference display sub-pixel selected by the reference display sub-pixel selection section as the reference, and

a pixel value correction operation section adapted to correct the pixel values of the sub-pixels corresponding to the remaining display sub-pixels except the reference display sub-pixel among the plurality of display sub-pixels, based on the displacement amount calculated by the display sub-pixel displacement amount calculation section.

4. The image processing device according to claim 1, wherein

each of the pixels is constituted by at least an R component sub-pixel, a G component sub-pixel, and a B component sub-pixel, and

the displacement amount storage section stores, based on the display position of the display sub-pixel corresponding to the G component sub-pixel constituting a display pixel at the reference position, the displacement amount of the display position of the display sub-pixel corresponding to the R component sub-pixel constituting the display pixel, and the displacement amount of the display position of the display sub-pixel corresponding to the B component sub-pixel constituting the display pixel.

5. The image processing device according to claim 1, wherein

the pixel value correction section corrects the pixel values of the sub-pixels corresponding to the display sub-pixels at at least one of a left end, a right end, an upper end, and a lower end of the display image plane.

6. The image processing device according to claim 1, wherein

the pixel value correction section corrects a luminance value of the sub-pixel corresponding to the display sub-pixel at the end.

7. An image display apparatus comprising:

the image processing device according to claim 1; and

an image display section adapted to display an image based on the pixel value of the sub-pixel corrected by the image processing device.

8. An image processing method adapted to correct a pixel value corresponding to a sub-pixel constituting a pixel, comprising:

obtaining the pixel value of the sub-pixel corresponding to a display sub-pixel at an end of a display image plane; and

correcting, in accordance with a displacement amount of a display position of the display sub-pixel constituting a display pixel at a reference position in the display image plane and corresponding to the sub-pixel, the pixel value of the sub-pixel corresponding to the display sub-pixel at the end of the display image plane.