Locating digital image planar surfaces

• US 20070126876A1
• Filed: 11/30/2005
• Published: 06/07/2007
• Est. Priority Date: 11/30/2005
• Status: Abandoned Application

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Fielding, Gabriel, Gallagher, Andrew, Cahill, Nathan, Ray, Lawrence
• Application Number:
  US11/290,213
• Publication Number:
  US 20070126876A1
• Time in Patent Office: Days
• US Class Current: 348/207.990
• CPC Class Codes: G06T 3/00 Geometric image transformations in the plane of the image
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G06V 20/36 Indoor scenes
• CPC Class Codes: G06V 20/64 Three-dimensional objects
• CPC Class Codes: H04N 13/128 Adjusting depth or disparity
• CPC Class Codes: H04N 23/611 where the recognised objects include parts of the human body
• CPC Class Codes: H04N 23/70 Circuitry for compensating brightness variation in the scene
• CPC Class Codes: H04N 23/71 Circuitry for evaluating the brightness variation
• CPC Class Codes: H04N 23/741 by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
• CPC Class Codes: H04N 23/76 by influencing the image signals
• CPC Class Codes: H04N 23/80 Camera processing pipelines; Components thereof
• CPC Class Codes: H04N 5/2226 Determination of depth image, e.g. for foreground/background separation determining depth by image analysis in general G06T7/50; segmentation by image analysis in general G06T7/10
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation

Abstract

A method of processing a digital image of a scene to locate a planar surface in the digital image, includes providing a range information including two or more range values indicating the distance of objects in the scene from a known reference frame; and using a planar model and the range information to locate one or more planar surfaces in the digital image.

Claims

1. A method of processing a digital image of a scene to locate a planar surface in the digital image, comprising:

(a) providing a range information including two or more range values indicating the distance of objects in the scene from a known reference frame; and

(b) using a planar model and the range information to locate one or more planar surfaces in the digital image.

2. The method of claim 1 further including:

(c) determining a geometric transform based on the detected planar surface(s); and

(d) applying the geometric transform to the digital image to produce a modified digital image.

3. The method of claim 2, wherein the geometric transform rectifies at least one detected planar surface.

4. The method of claim 2, wherein step c) further includes computing an angle related to the amount of camera rotation and determining the geometric transform based on the computed angle.

5. The method claimed in claim 1, wherein at least one planar surface is classified as a wall, ceiling, or floor.

6. The method of claim 1, further including:

(c) determining a geometric transform based on the detected planar surface(s);

(d) generating an image mask indicating positions of the digital image associated with the one or more planar surfaces; and

(e) using the image mask, the geometric transform, and the digital image to produce a modified digital image.

7. The method of claim 6, wherein the geometric transform rectifies at least one detected planar surface.

8. The method of claim 6, wherein step c) further includes computing an angle related to the amount of camera rotation and determining the geometric transform based on the computed angle.

9. A method of processing a digital image of a scene to modify the perspective of a digital image, comprising:

(a) providing a range information including two or more range values indicating the distance of objects in the scene from a known reference frame;

(b) providing a geometric transform that maps the range values to new range values; and

(c) using the new range values to modify the perspective of the digital image.

10. A method of processing a digital image of a scene to locate a planar surface in the digital image, comprising:

(a) using a digital camera to capture a digital image of a scene having objects;

(b) providing a range information including two or more range values indicating the distance of objects in the scene from a known reference frame; and

(c) using a planar model and the range information to locate one or more planar surfaces in the digital image.