eprintid: 3731
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/37/31
datestamp: 2023-11-09 15:51:59
lastmod: 2023-11-09 15:51:59
status_changed: 2023-11-09 15:47:30
type: article
metadata_visibility: show
creators_name: Rahmat, R.
creators_name: Malik, A.S.
creators_name: Kamel, N.
creators_name: Nisar, H.
title: 3D shape from focus using LULU operators and discrete pulse transform in the presence of noise
ispublished: pub
keywords: 2D images; 3-D shape; 3DShape recovery; A-transform; Depth information; Detection methods; Discrete pulse transform; Focus values; Noisy environment; Object based; Shape from focus; Shape preservation; Total variation; Traditional techniques, Shape optimization; Three dimensional computer graphics, Three dimensional
note: cited By 7
abstract: 3D shape recovery is an interesting and challenging area of research. Recovering the depth information of an object from a sequence of 2D images with varying focus is known as shape from focus. Focus value of an image carries information about the object and shape from focus is a method which depends on different focused value images. It reconstructs the shape/surface/depth of an object based on the different focused values of the object. These different focused valued images should be captured from the same angle. Calculating the shape of the object from different images with different focused values can be done by applying sharpness detection methods to maximize and detect the focused values. In this paper, we propose new 3D shape recovery techniques based on LULU operators and discrete pulse transform. LULU operators are nonlinear rank selector operators that are efficient with low complexity. They hold consistent separation, total variation and shape preservation properties. Discrete pulse transform is a transform that decomposes image into pulses. Therefore selection of right pulses, give sharpest focus values. The proposed techniques provide better result than traditional techniques in a noisy environment. © 2013 Elsevier Inc. All rights reserved.
date: 2013
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873295240&doi=10.1016%2fj.jvcir.2013.01.005&partnerID=40&md5=0b5279ca20a1b5f8a204fe2d2feb0776
id_number: 10.1016/j.jvcir.2013.01.005
full_text_status: none
publication: Journal of Visual Communication and Image Representation
volume: 24
number: 3
pagerange: 303-317
refereed: TRUE
issn: 10473203
citation:   Rahmat, R. and Malik, A.S. and Kamel, N. and Nisar, H.  (2013) 3D shape from focus using LULU operators and discrete pulse transform in the presence of noise.  Journal of Visual Communication and Image Representation, 24 (3).  pp. 303-317.  ISSN 10473203