In this paper, we propose an extended successive elimination algorithm (SEA) for fast optimal block matching motion estimation (ME). By reinterpreting the typical sum of absolute differences measure, we can obtain additional decision criteria whether to discard the impossible candidate motion vectors. Experimental results show that the proposed algorithm reduces the computational complexity up ...

Local image matching (block-matching) is a frequent operation in many image processing tasks, such as MPEG compression and the estimation of optical flow and stereo disparities. Normalized cross-correlation (NCC) is particularly useful since it is insensitive to both signal strength and level. However, NCC is computationally expensive. In this article we attempt to speed up NCC first by transfo...

| This paper describes a VLSI architecture which can be recon gured to support both Full Search Block{Matching algorithm and 3{step Hierarchical Search Block{Matching algorithm. By using a recon gurable register{ mux array and a parameterizable adder tree, the 2{D array architecture provides e cient real time motion estimation for many video applications. We also propose a memory architecture a...

Motion estimation is a key technique in most algorithms for video compression and particularly in the MPEG and H.261 standards. The most frequently used technique is based on a Full Search Block Matching Algorithm which is highly computing intensive and requires the use of special purpose architectures to obtain real-time performance. In this paper we propose an approach to the parallel impleme...

The only trouble with Richard Smith, for 13 years Editor of the British Medical Journal, is that he writes well but tends to repeat himself. Editors, and ex-editors, are a small group in the medical world, but we like to think we have been influential. This book is a series of stories of Richard Smith’s interaction with prospective authors, medical researchers of all sorts, the authorities of t...

In block-matching motion estimation (BMME), the search patterns have a significant impact on the algorithm’s performance, both the search speed and the search quality. The search pattern should be designed to fit the motion vector probability (MVP) distribution characteristics of the real-world sequences. In this paper, we build a directional model of MVP distribution to describe the directiona...

Because general algorithms seldom detect copy-move forgery with angle rotation and block matching algorithms are very time-consuming, this paper proposes a detection algorithm which is able to detect copymove forgery with rotation of certain angles by using the direction invariance of the circular projection vector. At the same time, considering the influence of random noise and brightness chan...

This paper is based upon Adaptive Rood Pattern Search algorithm for Block Matching Algorithm. There are various types of algorithm is available but this method is most reliable. Experimental results shows that it gives better results than other algorithms. This algorithm uses motion activity of the video. In this paper, adaptive rood pattern search method using motion activity is applied on vid...

Apart from robustness and accuracy of copy–paste image forgery detection, time complexity also plays an important role to evaluate the performance of the system. In this paper, the focus point is to improve time complexity of the block-matching algorithm. Hence, a coarse-to-fine approach is applied to propose an enhanced duplicated region detection model by using sequential block clustering. Cl...