نتایج جستجو برای: blur image

تعداد نتایج: 379128  

2001
Kim-Hui Yap Ling Guan

In this paper, we present a new approach to adaptive blind image deconvolution based on computational reinforced learning in attractor-embedded solution space. A new subspace optimization technique is developed to restore the image and identify the blur. Conjugate gradient optimization is employed to provide an adaptive image restoration while a new evolutionary scheme is devised to generate th...

Journal: :CoRR 2018
Yuanchao Bai Gene Cheung Xianming Liu Wen Gao

Blind image deblurring, i.e., deblurring without knowledge of the blur kernel, is a highly ill-posed problem. The problem can be solved in two parts: i) estimate a blur kernel from the blurry image, and ii) given estimated blur kernel, deconvolve blurry input to restore the target image. In this paper, we propose a graph-based blind image deblurring algorithm by interpreting an image patch as a...

2009
Hyuk Park

A new method, based on the normal shrink and modified version of Katssagelous and Lay, is proposed for multiscale blind image restoration. The method deals with the noise and blur in the images. It is shown that the normal shrink gives the highest S/N (signal to noise ratio) for image denoising process. The multiscale blind image restoration is divided in two sections. The first part of this pa...

Journal: :SIAM J. Imaging Sciences 2015
Sohail Bahmani Justin K. Romberg

In this paper we analyze the blind deconvolution of an image and an unknown blur in a coded imaging system. The measurements consist of subsampled convolution of an unknown blurring kernel with multiple random binary modulations (coded masks) of the image. To perform the deconvolution, we consider a standard lifting of the image and the blurring kernel that transforms the measurements into a se...

2011
Yan Chen

In this paper, we aim at the restoration of local motion-blur. On the base of construction of basic model of local motion-blur, the formation mechanism of local motion-blur is analyzed, and a new restoration algorithm aimed at local motion-blur in a complex background is proposed. In the algorithm, the problem of restoration of blurred image with complex background is simplified. First, the blu...

2016
Ravi Saini Sarita Bajaj

the image blurring is caused by motion and out of focus parameters and type of blur can be classified as global blur and local blur. In this paper the most challenging spatially varying blured detection schemes are proposed.In this the blur detection techniques for digital images are used in order to determine the blur detection several classifiers are used. In this paper we reviewed SVM & DCT ...

2015
Hao Cai Leida Li Jiansheng Qian Jeng-Shyang Pan

Blur is a key factor in the perception of image quality, leading to spread of edges in images. The quantity of feature points extracted from images can represent image shape changes. Compared with sharp images, blurred images tend to contain less feature points, and the reduction of feature points is related to blur. In this paper, we propose a new blind blur assessment metric based on feature ...

Journal: :Vision Research 2002
Katrina L Schmid D Robert Iskander Roger W.H Li Marion H Edwards John K.F Lew

There is some suggestion that the ability to detect blur may be altered in adults with myopia. Here, we address the question of whether children with myopia have worse blur detection than other children, and whether blur detection in myopic children is related to the rate of myopia progression. We recruited 20 myopes and 20 non-myopes aged between 8 and 12 years. Refractive errors, visual acuit...

2013
Fatma Kerouh Amina Serir

The aim of this article is to propose a blur kernel estimation method based on the new concept of the Multiplicative Multiresolution Decomposition (MMD). This method quantifies the blur effect in the MMD’s domain by analyzing edges spreading through a multiresolution analysis. The histogram of edges spreading over the entire image is used as information about the blur amount in the image. Tests...

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