New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of digital fingerprinting. Assigned to Amazon, the first patent addresses techniques useful for 3D printing data for viewpoint invariant object recognition. Assigned to Google, the second patent addresses techniques for associating audio tracks of an album with video content.
9,349,180, "Viewpoint invariant object recognition," assigned to Amazon.
Utilizing viewpoint and scale invariant feature descriptors for object recognition and/or tracking. For example, a user can capture three-dimensional ("3D") image data including a representation of an object. The 3D image data can be analyzed to detect one or more feature points of the object represented in the image data, where the detected feature points can include position and distance information. The feature points in each image can be correlated and a feature descriptor, or unique fingerprint, can be determined for each detected feature point. The feature descriptors can provide for a multi-dimension vector that includes a unique fingerprint for that feature point that incorporates position information as well as depth information. The feature descriptors corresponding to the correlated feature points can be combined (e.g., added, averaged, etc.) and the combined feature descriptors can be used for performing view point invariant object recognition, image matching, or other such purposes.
9,344,759, "Associating audio tracks of an album with video content," assigned to Google.
An example method comprises determining, by a computing device, an indication of video content, determining, by the computing device and based at least in part on the indication, one or more candidate albums, selecting, by the computing device, a particular candidate album of the one or more candidate albums based at least in part on a match between an audio fingerprint of an audio track included in the video content and an audio fingerprint of an audio track included in the particular candidate album, and sending, by the computing device, a message that associates the video content with the particular candidate album.