Canon Kabushiki Kaisha

Andrew R Coker

Jun Liu

Hervé Soulard

Peter Vincent Wyatt

Matthew Scott Dalton

Abhijit Mandal

A method of tessellating a parametric patch () of an object is disclosed. A boundary curve associated with the parametric patch () is vectorized according to a pre-determined flatness tolerance. A tessellation point associated with a first parametric value inside the parametric patch () is determined based on geometry of the parametric patch () and a tessellation step. A curve associated with the first parametric value is determined based on the geometry of the parametric patch () and the tessellation step. A color split point on the vectorized boundary curve is determined. The color split point is determined based on the vectorized boundary curve and the determined curve associated with the first parametric value. The parametric patch () is tessellated by joining the color split point and the tessellation point.

Method, apparatus and system for tessellating a parametric patch

A method of rendering a parametric patch. The patch is defined by a geometry and a color varying according to a surface mapping points of the patch to intermediate values. Each of the intermediate values is mapped to a color value according to a shading color function. A set of intermediate values is determined for the patch. The determined set of intermediate values represent an approximation of the shading color function by linear segments. The patch is tessellated into a plurality of cells. Tessellation points are determined for each of the plurality of cells according to the determined set of intermediate values. A further cell is formed for the patch by joining, within each of said plurality of cells, a plurality of the tessellation points being of equal intermediate value and approximating isolines of the surface. The patch is rendered using the intermediate values.

Method, system and apparatus for rendering

A method is disclosed where an initial placement of a watermark annotation on an output medium associated with a page and placement of an area of the page, is determined. The determined initial placement is relative to the output medium and independent of the placement of the area of the page. The initial placement of the watermark annotation is adjusted so that the watermark annotation at least partially overlaps the area of the page.

Method, system and apparatus for determining position of a watermark annotation

A printing system comprising storage means () in a client computer () for storing a client service item file () which comprises a set of user selectable service items (e.g.,). Each service item () comprises a set of printing attributes (). The client service item file () is updated in accordance with communication with an external apparatus (). The system also has a client computer user interface () by means of which a user can select a particular one of the service items (e.g.,) having a particular set of printing attributes (). The system also has a client computer print process driver () adapted to process a print job () according to the particular set of printing attributes.

Growing community of inventors

Macquarie Park, Australia

Andrew R Coker