Canon Kabushiki Kaisha

Simon John Liddington

Ka-Ming Leung

A method of selecting a first image from a plurality of images for constructing a coordinate system of an augmented reality system. A first image feature in the first image corresponding to the feature of the marker is determined. A second image feature in a second image is determined based on a second pose of a camera, said second image feature having a visual match to the first image feature. A reconstructed position of the feature of the marker in a three-dimensional (3D) space is determined based on positions of the first and second image features, the first and the second camera pose. A reconstruction error is determined based on the reconstructed position of the feature of the marker and a pre-determined position of the marker.

Key-frame selection for parallel tracking and mapping

A method of browsing a plurality of media items is disclosed. At least one of the media items being associated with a plurality of tag values, each tag value having a level. The method constructs a hierarchical tree structure of tag values according to the levels of the tag values, such that any tag value on any branch of the tree structure from a first tag value is associated with a media item with which said first tag value is associated. At least a first portion of the constructed tree structure is displayed in a graphical user interface. User input is detected to change the level of a second tag value in the displayed portion. The tree structure is reconstructed according to the changed levels of the tag values, such that any tag value on any branch from a third tag value remains associated with a media item with which said third tag value is associated. At least a second portion of the reconstructed tree structure is then displayed in the graphical user interface.

Growing community of inventors

Drummoyne, Australia

Simon John Liddington