General approach to block-matching motion estimation

Seferidis, V.; Ghanbari, Mohammad

doi:10.1117/12.138613

Cited by 97 publications

(26 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And in Ref. 15 a projective transformation and a bilinear transformation, of which the affine transformation is a special case, are applied. These schemes use two kinds of pixel values to calculate the parameters for the above transformations, and hence the information of the whole image is utilized effectively.…”

Section: Discussionmentioning

confidence: 99%

Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions

Hisanaga

Kuribayashi

Tanaka

2006

Electron. Comm. Jpn. Pt. III

View full text Add to dashboard Cite

SUMMARYOne of the important problems of watermarking techniques is the weakness against geometrical distortions because of synchronization loss. In this paper, we propose an image compensation scheme against geometrical distortions in order to extract watermarks correctly. Our scheme collects the feature points in an image so as to recover the distortions caused by geometrical distortion attacks. Such feature points are selected by the local maximal value of partitioned regions which can be obtained by several filtering operations. Based on the computer simulated results, we have searched the optimal filtering operation and interpolation, and then studied the validity of our scheme.

show abstract

Section: Discussionmentioning

confidence: 99%

Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions

Hisanaga

Kuribayashi

Tanaka

2006

Electron. Comm. Jpn. Pt. III

View full text Add to dashboard Cite

show abstract

“…Similar mesh-based and block-A variety of methods have been proposed in the literature for based hybrid MC algorithms are also independently proposed improved MC, including deformable block MC [2], overlapped in [13][14][15][16][17]. Experimental results in Section IVA demonstrate block MC (OBMC) [3], and two-dimensional (2D) mesh-based improved visual and PSNR performance of this hybrid codec MC [4][5][6][7][8][9][10].…”

mentioning

confidence: 99%

A hybrid video codec with block-based and mesh-based motion compensation modes

Altunbasak

Tekalp

1998

Int. J. Imaging Syst. Technol.

View full text Add to dashboard Cite

This article presents a complete video codec which supports both block‐based and mesh‐based motion compensation modes. While the mesh‐based modes are suitable for spatially continuous representation of in‐plane rotations, zooms, and other motions that can be represented by parametric mappings, the block‐based modes (especially overlapped block matching) perform better around motion boundaries. Therefore, a hybrid codec with block‐based and mesh‐based modes, which nicely complement each other, yields the best results over a wide range of video at low bit rates. Experimental results with MPEG‐4 test sequences are shown to demonstrate the performance of the proposed hybrid codec. © 1998 John Wiley & Sons, Inc. Int J Imaging Syst Technol, 9, 248–256, 1998

show abstract

“…In [62] an affine model for image match ing is proposed, where each block undergoes an affine transform instead of a translation in the standard tech nique. Similarly, a generalized block matching algorithm is proposed in [63] which includes complex motions such as rotation or nonlinear deformation. Of course, a more complex motion model leads to a more accurate motion estimation.…”

Section: Block Ma Tching Techniquesmentioning

confidence: 99%

Motion estimation techniques for digital TV: a review and a new contribution

1995

View full text Add to dashboard Cite

The key to high performance in image sequence coding lies in an efficient reduction of the temporal redundancies. For this purpose, motion estimation and compensation techniques have been suc cessfully applied. This paper studies motion estimation algorithms in the context of fi rst generation coding techniques commonly used in digital TV. In this framework, estimating the motion in the scene is not an intrinsic goal. Motion estimation should indeed provide good temporal prediction and simultaneously require low overhead information. More specifically, the aim is to minimize globally the bandwidth corresponding to both the prediction error information and the motion parameters. This paper first clarifies the notion of motion, reviews classical motion estimation tech niques, and outlines new perspectives. Block matching techniques are shown to be the most appropriate in the framework of first generation coding. To overcome the drawbacks characteristic of most block matching techniques, this paper proposes a new locally adaptive multigrid block matching motion estimation technique.This algorithm has been designed taking into account the above aims. It leads to a robust motion field estimation, precise prediction along moving edges and a decreased amount of side information in uniform areas. Furthermore, the algorithm controls the accuracy of the motion estimation procedure in order to optimally balance the amount of information corresponding to the prediction error and to the motion parameters. Experimental results show that the technique results in greatly enhanced visual quality and significant saving in terms of bit rate when compared to classical block matching techniques.

show abstract

General approach to block-matching motion estimation

Cited by 97 publications

References 5 publications

Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions

Improvement of watermark detection ability based on blockwise image compensation for geometrical distortions

A hybrid video codec with block-based and mesh-based motion compensation modes

Motion estimation techniques for digital TV: a review and a new contribution

Contact Info

Product

Resources

About