Inter frame

About: Inter frame is a research topic. Over the lifetime, 4154 publications have been published within this topic receiving 63549 citations.

Vision-based space autonomous rendezvous: A case study

Abstract: For a space rendezvous mission, autonomy imposes stringent performance requirements regarding navigation. For the final phase, a vision-based navigation can be a solution. A 3D model-based tracking algorithm has been studied and tested on a mock-up of a telecommunication satellite, using a 6-DOF robotic arm, with satisfactory results, in terms of precision of the pose estimation and computational costs. Quantitative tests in open loop have been carried out to show the robustness of the algorithm to relative inter frame motions chaser/target, orientation variations and illumination conditions. The tracking algorithm has also been successfully implemented in a closed loop chain for visual servoing.

Gridlocked method and system for video motion compensation

Abstract: A method and system for video motion compensation (21) in which an overall interframe motion vector is divided into a relative block motion vector and a subblock motion vector. Image reconstruction is achieved by adjusting the delay between the synchronization pulse and the start of the pixel data according to the subblock motion vector, and accessing stored data from memory (42) according to the relative block motion vector. Accessing memory in a block-quantized format ensures that page mode accesses are confined to the same memory row.

Method and apparatus for frame rate up conversion with multiple reference frames and variable block sizes

Abstract: A method for creating an interpolated video frame using a current video frame, and a plurality of previous video frames. The method includes creating a set of extrapolated motion vectors from at least one reference video frame in the plurality of previous video frames ; performing an adaptive motion estimation using the extrapolated motion vectors and a content type of each extrapolated motion vector ; deciding on a motion compensated interpolation mode ; and, creating a set of motion compensated motion vectors based on the motion compensated interpolation mode decision. An apparatus for performing the method is also disclosed.

Systems and methods for tracking objects in video sequences

Abstract: A method for tracking one or multiple objects from an input video sequence allows a user to select one or more regions that contain the object(s) of interest in the first and the last frame of their choice. An initialization component selects the current and the search frame and divides the selected region into equal sized macroblocks. An edge detection component computes the gradient of the current frame for each macroblock and a threshold component decides then which of the macroblocks contain sufficient information for tracking the desired object. A motion estimation component computes for each macroblock in the current frame its position in the search frame. The motion estimation component utilizes a search component that executes a novel search algorithm to find the best match. The mean absolute difference between two macroblocks is used as the matching criterion. The motion estimation component returns the estimated displacement vector for each block. An output component collects the motion vectors of all the predicted blocks and calculates the new position of the object in the next frame.

Systems and methods for reducing frame rates in a video data stream

Abstract: The present invention is related to video encoding. In an embodiment, a sequence of frames is received. For each frame in at least a portion of the sequence of frames, a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame is calculated. At least partly based on the corresponding mean of absolute differences value weighted by a temporal parameter, a first frame in the sequence of frames is skipped.