Image processing method, image processing apparatus, and storage medium

• US 6,674,922 B1
• Filed: 02/07/2000
• Issued: 01/06/2004
• Est. Priority Date: 03/26/1999
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Katayama, Akihiro, Sakagawa, Yukio, Kotake, Daisuke
• Primary Examiner(s): Mehta, Bhavesh M.
• Assistant Examiner(s): PATEL, KANJIBHAI B
• Application Number:
  US09/499,300
• Time in Patent Office: 1,429 Days
• Field of Search: 382/108, 382/154, 382/162, 382/253, 382/254, 382/274, 382/284, 382/299, 382/300, 382/312, 358/1-2, 358/525, 345/426, 345/427, 345/582, 345/584, 345/606, 345/653, 345/660
• US Class Current: 382/300
• CPC Class Codes: G06T 15/04 Texture mapping
• CPC Class Codes: G06T 15/205 Image-based rendering
• CPC Class Codes: G06T 3/4007 based on interpolation, e.g. bilinear interpolation image demosaicing G06T3/4015; edge-driven or edge-based scaling G06T3/403

Abstract

An image processing apparatus includes recording unit which has recorded image information appended with quantized space information in units of pixels, setting unit for setting a resolution higher than that of the recorded image information, reconstruction unit for reconstructing an image by reading out image information from the recording unit at the recorded resolution irrespective of the resolution set by the setting unit, and interpolation unit for making pixel interpolation of the reconstructed image with the resolution of the reconstructed image matching the resolution set by the setting unit.

Claims

1. An image processing apparatus comprising:

recording means which has recorded in units of pixels image information appended with space information that has been quantized at a predetermined first resolution;

determination means for determining viewpoint information;

setting means for setting a second resolution higher than the first resolution; and

sample/interpolation means for sampling image information of the first resolution from the recorded image information based on the view point information, interpolating the sampled image information using texture mapping based on the first and second resolutions, and outputting image information having the second resolution.

2. The apparatus according to claim 1, wherein the image information is expressed by a ray space theory.

3. The apparatus according to claim 2, wherein when ray space data has different resolutions in different coordinate axis directions, recorded ray space data are sampled at the lower resolution.

4. The apparatus according to claim 1, wherein the sample/interpolation means pastes texture data by enlarging texture data to a magnification of the second resolution/first resolution.

5. The apparatus according to claim 1, wherein the sample/interpolation means samples ray space data along a line segment which passes through a desired view point position in a ray space.

6. The apparatus according to claim 5, wherein the line segment is equally divided to a designated resolution, and the equally divided points are used as sampling points.

7. An image processing method for reconstructing an image based on image information read out from recording method which has recorded in units of pixels image information appended with space information that has been quantized at a predetermined first resolution, comprising:

determination step of determining viewpoint information;

setting step of setting a second resolution higher than the first resolution; and

sample/interpolation step of sampling image information at the first resolution from the recorded image information based on the view point information, interpolating the sampled image information using texture mapping based on the first and second resolutions, and outputting image information having the second resolution.

8. The method according to claim 7, wherein the image information is expressed by a ray space theory.

9. The method according to claim 8, wherein when ray space data has different resolutions in different coordinate axis directions, recorded ray space data are sampled at the lower resolution.

10. The method according to claim 7, wherein the sample/interpolating step includes the step of pasting texture data by enlarging a texture data to a magnification of a second resolution/first resolution.

11. The method according to claim 7, wherein the sample/interpolation step includes a step of sampling ray space data along a line segment which passes through a desired view point position in a ray space.

12. The method according to claim 11, wherein the line segment is equally divided at a designated resolution, and equally divided points are used as sampling points.

13. A storage medium which stores a computer program for implementing a method of claim 7.