| US 7,577,902 B2 | ||
| Systems and methods for annotating pages of a 3D electronic document | ||
| Lichan Hong, Mountain View, Calif. (US); Stuart K Card, Los Altos, Calif. (US); and Ed H Chi, Palo Alto, Calif. (US) | ||
| Assigned to Palo Alto Research Center Incorporated, Palo Alto, Calif. (US) | ||
| Filed on Dec. 16, 2004, as Appl. No. 11/12,902. | ||
| Prior Publication US 2006/0136813 A1, Jun. 22, 2006 | ||
| Int. Cl. G06F 17/00 (2006.01) | ||
| U.S. Cl. 715—232 [715/230; 715/231; 715/233; 345/629; 345/633; 345/619] | 20 Claims |
| 1. A method for annotating a three-dimensional page of a three-dimensional electronic document, comprising:
displaying the three-dimensional page, the three-dimensional page having a first layer intrinsic therewith;
receiving, via an annotation tool, an indication of an area of the object to be annotated;
annotating a second layer, the second layer intrinsic with the three-dimensional page by marking the area of the three-dimensional
page specified by the annotation tool, the second layer being represented by a three-dimensional geometry; and
displaying an annotation corresponding to the specified area, wherein the annotation of the second layer is transformed to
and displayed in a third layer other than the second layer and the first layer, the third layer being represented in a two-dimensional
coordinate system of the three-dimensional page.
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