Abstract — An iterative algorithm to enhance the quality of optoacoustic images is proposed based on Banach fixed point theorem. Numerical simulation propagation ultrasound waves and image reconstruction for media with characteristics close soft biological tissues has been performed. The problem eliminating distortions artifacts in modeled four schemes. efficiency approach demonstrated even a f...

The problem of timing recovery operating at low signal-to-noise ratio has been recently solved by a modified per-survivor iterative timing recovery (MPS-ITR) proposed in [1], which jointly performs timing recovery, equalization, and error-correction decoding. In practice, this scheme exploits a splitpreamble strategy in conjunction with a per-survivor soft-output Viterbi algorithm equalizer to ...

Resolution enhancement is a basic and important technology in image/video processing. The goal of resolution enhancement is to reconstruct high-resolution image frames from the corresponding lowresolution versions. In this paper, an adaptive resolution enhancement scheme based on iterative backprojection was proposed. According to sub-pixel interpolation, additional information composed of seve...

Climent and Perea [Journal of Computational Applied Mathematics 58:43–48, 2003; MR2013603] proposed first the convergence theory two-stage iterative scheme for solving real rectangular linear systems. In this article, we revisit same theory. The main result provides some sufficient conditions which guarantee that induced splitting from a is proper weak regular splitting. We then establish few c...

The aim of this article is to introduce a new iterative scheme namely CR iterative scheme with errors and prove a general convergence theorem to approximate the unique common fixed point of three operators satisfying a certain contractive condition in an arbitrary Banach space using this newly introduced iterative scheme. An example showing the validity of our results is provided. Comparative a...