IMPROVED DEPTH PREDICTION FOR DEPTH IMAGE COMPRESSION

A method in a depth encoder (300) to encode a depth image includes receiving (901) a depth image of a depth bitstream. A pose of a camera associated with the depth image in a coordinate system of a point cloud map (604) is calculated (903). For each pixel in the depth image, whether there is a match...

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Bibliographische Detailangaben
Hauptverfasser:	GERÖ, Balázs Peter, KERN, András, FORMANEK, Bence, JOCHA, Dávid, ENYEDI, Gabor Sandor
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	A method in a depth encoder (300) to encode a depth image includes receiving (901) a depth image of a depth bitstream. A pose of a camera associated with the depth image in a coordinate system of a point cloud map (604) is calculated (903). For each pixel in the depth image, whether there is a matching point in the point cloud map (604) is determined (905). Responsive to there being a matching point, a distance is calculated (907) between the pixel and the matching point and used as a prediction error. Responsive to there not being a matching point, an original depth value is used (909). Depth quantization on the pixel is performed (911) based on whether or not there is the matching point. The quantized depth image is entropy coded (913). The entropy coded depth image is added (915) to a compressed depth image bitstream.