Verfahren und Vorrichtung zur Verfolgung der Bewegung von Bildinhalt in einer Videorahmensequenz mit Subpixelauflösungsbewegungsschätzung

Details

Veröffentlichungs-Nr.

EP3023939

Aktenzeichen

EP15193666

Anmeldetag

9. November 2015

Veröffentlichung

10. Januar 2018

Erteilung

10. Januar 2018

Rechtsraum

EP

IPC

H04N19/00G06T7/207

Abstract

The motion of image content such as a point of interest in a video frames sequence is tracked using sub-pixel resolution motion estimation in forward and/or backward direction. The motion of image content or a point of interest between a reference frame and a following frame is estimated, starting from an integer pixel position in the reference frame. If the motion vector (v2 t ) has a position between integer pixel positions, the coordinates of that motion vector are replaced by an adjacent integer pixel position (v2 r ) in the following or previous frame, and the error value (off2) between these coordinates and the replacement coordinates is stored. Thereafter the following or previous frame is defined as the current frame, the motion (v3 c ) of the object is estimated between the replacement coordinates in the current frame and a following frame, and the stored error value is added in opposite direction (off3) to the corresponding motion vector, so as to get a corresponding precise motion vector (v3 t ). If the precise motion vector (v3 t ) has a position between integer pixel positions in the following or previous frame, its coordinates are replaced by an adjacent integer pixel position in the following or previous frame, and the corresponding error value (off3) is stored, and so on.

Anmelder

Firma

Thomson Licensing

Land

🇫🇷 Frankreich

Fachgebiete