contained in aerial video sequences such as captured from unmanned aerial vehicles (UAV), an affine motion model can be applied.

In order to also cover non-translational motion types like rotation or scaling (zoom), e.g. A multiple global affine motion model is proposed for low bit rate video compression. Block-wise motion segmentation is first performed with the number of motion objects L predefined. The fundamental motion model of the conventional block-based motion compensation in High Efficiency Video Coding (HEVC) is a translational motion model. The affine motion models for multiple MOs are estimated and coded in the frame header. motion model is employed. abstract A multiple global affine motion model is proposed for low bit rate video compression. IJCV, 9(2):137-154, November 1992. Most algorithms perform 2-D motion segmentation by assuming the motions in the scene can be modeled by 2-D affine motion models.

First, we propose to reduce the number of affine motion parameters from 6 to 4. First, we propose to reduce the number of affine motion parameters from 6 to 4. Compute Mk, estimate of motion at level k – Can be local motion estimate (uk,vk) • Vector field with motion of patch at each pixel – Can be global motion estimate • Parametric model (e.g., affine) of dominant motion for entire image – Choose max k such that motion … In order to also cover non-translational motion types like rotation or scaling (zoom), e.g. Rather, these points are used to set up an affine motion model. First, we propose to reduce the number of affine motion parameters from 6 to 4. The 2-D displacement vectors are estimated as parameters of a 2-D affine model that generalizes standard block matching by allowing affine shape deformations of image blocks and affine intensity transformations. !!! In this paper, we study a simplified affine motion model based coding framework to overcome the limitation of translational motion model and maintain low computational complexity. An affine model has six parameters and represents rotation and translation, projected onto the image plane, as. The proposed four-parameter affine motion model can not only handle most of the complex motions in natural videos but also save the bits for two parameters.
In this paper, we study a simplified affine motion model based coding framework to overcome the limitation of translational motion model and maintain low computational complexity. ( ) i j n k 1 i j k n k 1 i j …
An affine (or first-order) optic flow model has 6 parameters, describing image translation, dilation, rotation and shear. Courtesy of Silvio Savarese.! between the current block of video data and a corresponding predictor block of video data. The proposed framework mainly has three key contributions. Abstract: In this paper, we study a simplified affine motion model-based coding framework to overcome the limitation of a translational motion model and maintain low-computational complexity. The affine motion models for multiple MOs are estimated and coded in the frame header. A multiple global affine motion model is proposed for low bit rate video compression.

This paper presents an affine model for 3-D motion and shape recovery using two perspective views and their relative 2-D displacement field. However, in the real world, the motion of an object exists in the form of combining many kinds of motions.

• Centering: subtract the centroid of the image points !

• Factorization ! Block-wise motion segmentation is first performed with the number of motion objects L predefined.


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