Gopro, Inc.

Lsi Logic Corporation

Charles Weckel

Vishwanatha Bhat

Hervé Brelay

Feng-Ming Wang

Synchronization of a frame rate to a detected cadence includes receiving a sequence of image frames. Motion data recorded contemporaneously with a capture of the sequence of image frames are also received. At least some of the motion data are converted from time domain data to frequency domain data. A dominant frequency in the frequency domain data is determined. Frames from the sequence of image frames are sampled at a sampling frequency related to the dominant frequency. A new image sequence is created using the sampled frames.

Dynamic synchronization of frame rate to a detected cadence in a time lapse image sequence

A frame rate is synchronized to a detected cadence in order to generate an output image sequence that is substantially stabilized. In an in-camera process, a camera receives motion data of the camera while the camera captures the sequence of image frames. A dominant frequency of motion is determined and the capture frame rate is dynamically adjusted to match the frequency of detected motion so that each image frame is captured when the camera is at approximately the same position along the axis of motion. Alternatively, in a post-processing process, frames of a captured image sequence are selectively sampled at a sampling rate corresponding to the dominant frequency of motion so that each sampled frame corresponds to an image capture that occurred when the camera is at approximately the same position along the axis of motion.

Synchronization of frame rate to a detected cadence in a time lapse image sequence using sampling

A method is provided for encoding K&#x3e;1 sequentially presented video pictures. Each of the K pictures is divided into an m&#x3e;1 row&#xd7;n&#x3e;1 column array of non-overlapping coding units of equal sizes. Each coding unit occupies a respective coding unit position in the picture from which it was divided. An arbitrary, pseudo random pattern of coding units is selected for refreshing during each of the K pictures. Each pattern selected during any given one of the K pictures includes a sequence of one or more coding units of the array. In addition, the pixels of each coding unit selected for refreshing during a kpicture occupy different pixel positions than each coding unit selected for refreshing during a preceding one of the 1to (k&#x2212;1)pictures of the K pictures. Furthermore, each pixel position of a moving picture image formed from the K pictures is selected for refreshing once over the sequence of K pictures. A system for encoding includes a source of the K pictures and an intra/inter decision circuit for selecting the coding units for refreshing over the sequence of K frames. The method or system produces an encoded signal which can be stored on a storage medium. A method and system for decoding the encoded signal is also provided.

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Cupertino, CA, United States of America

Charles Weckel