Apparatus and method for rendering synthetic objects into real scenes using measurements of scene illumination

• US 6,628,298 B1
• Filed: 07/16/1999
• Issued: 09/30/2003
• Est. Priority Date: 07/17/1998
• Status: Expired due to Term

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Debevec, Paul E.
• Primary Examiner(s): Brier, Jeffery
• Application Number:
  US09/356,247
• Time in Patent Office: 1,537 Days
• Field of Search: 345/433, 345/435, 345/426, 345/632, 345/633
• US Class Current: 345/632
• CPC Class Codes: G06T 15/506 Illumination models
• CPC Class Codes: G06T 15/55 Radiosity

Abstract

A method of placing an image of a synthetic object into a scene includes the step of establishing a recorded field of illumination that characterizes variable incident illumination in a scene. A desired position and orientation of a synthetic object is specified within the scene with respect to the recorded field of illumination. A varying field of illumination caused by the synthetic object is identified within the scene. Synthetic object reflectance caused by the synthetic object is simulated in the scene. The synthetic object is then constructed within the scene using the varying field of illumination and the synthetic object reflectance.

Claims

1. A method of placing an image of a synthetic object into a scene, said method comprising the steps of:

securing an omnidirectional image of a said scene to produce a high dynamic range illuminated scene;

specifying a desired position and orientation of a synthetic object within said high dynamic range illuminated scene;

partitioning said high dynamic range illuminated scene into a distant scene, a local scene, and said synthetic object;

computing a global illumination solution of said distant scene while assuming that it is photometrically unaffected by said local scene and said synthetic object; and

computing a global illumination solution of said local scene that includes shadows and reflected light from said synthetic object.

2. A method of placing an image of a synthetic object into a scene, said method comprising the steps of:

securing an omnidirectional image of a said scene to produce a high dynamic range illuminated scene;

specifying a desired position and orientation of a synthetic object within said high dynamic range illuminated scene; and

altering said high dynamic range illuminated scene based upon the presence of said synthetic object;

wherein said altering step includes;

partitioning said scene into a distant scene, a local scene, and said synthetic object;

rendering said distant scene while assuming that it is photometrically unaffected by said local scene and said synthetic object; and

computing a high dynamic range global illumination solution of said local scene that includes shadows and reflected light from said synthetic object.

3. The method of claim 2, wherein the step of computing a global illumination solution includes computing a global illumination solution for said synthetic object.

4. The method of claim 2, wherein the step of securing an omnidirectional image includes securing a high dynamic omnidirectional radiance map within said scene.

5. The method of claim 4, wherein the step of rending said distant scene includes mapping radiance values from the high dynamic range omnidirectional radiance map onto said distant scene, and computing a global illumination solution for the distant scene, where the global illumination solution for the distance scene is unaffected by said local scene and said synthetic object.

6. The method of claim 2, wherein the step of rending said distant scene includes computing a global illumination solution for the distant scene, where the global illumination solution for the distance scene is unaffected by said local scene and said synthetic object.

7. Apparatus for placing an image of a synthetic object into a scene, comprising:

means for securing an omnidirectional image of a scene to produce a high dynamic range illuminated said scene;

means for specifying a desired position and orientation of a synthetic object within said high dynamic range illuminated scene;

means for partitioning said high dynamic range illuminated scene into a distant scene, a local scene, and said synthetic object;

means for computing a global illumination solution of said distant scene while assuming that it is photometrically unaffected by said local scene and said synthetic object; and

means for computing a global illumination solution of said local scene that includes shadows and reflected light from said synthetic object.