Questions tagged [motion-compensation]

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2 votes
1 answer
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How to calculate and compensate group delay caused by channel and how to define group delay to wideband signal?

Suppose a wideband signal is sent and received by a RX. If different frequency components travel in different speed then there exists group delay in the signal, right? Not consider the multipath ...
Xiang Li's user avatar
  • 121
0 votes
1 answer
43 views

Why do we need motion vectors in MPEG?

I'm trying to understand how the encoding of a I and P Frame works. The I frame is just encoded like a JPEG image. I'v read that for the P-Frame we need to calculate some motion vectors, apply it to ...
Marcel Herbst's user avatar
0 votes
0 answers
73 views

Motion compensation for stripmap SAR

I am trying to perform motion compensation for an airborne stripmap SAR data following the book Synthetic Aperture Radar Processing by Franceschetti and Lanari. The algorithm flowchart is on page 145. ...
Rifat Afroz's user avatar
3 votes
2 answers
152 views

motion compensation for range migration algorithm

Is there a simple to follow explanation of how to do second order motion compensation for range migration algorithm? The one described in Carrara et al is for the ideal case. For the Extended Omega K ...
matthew's user avatar
  • 95
3 votes
4 answers
2k views

Create images with sub-pixel shift

I want to test some motion estimation algorithms which compute motion with sub-pixel accuracy. I can create images shifted by the order of pixel (e.g. [2,2]) using ...
Saikat Das's user avatar
17 votes
3 answers
11k views

How do the motion vectors work in predictive coding for MPEG?

In MPEG, there is a process where an image is broken up into macroblocks and a motion vector is computed for each of those macro blocks. You then transmit these vectors, along with the prediction ...
Wallet's user avatar
  • 171