Image and Vision Computing

Items from 1 to 20 out of 23 results

article

Object-based video coding with dynamic quality control

Xiaodong Cai, F.H. Ali, E. Stipidis

Image and Vision Computing > 2010 > 28 > 3 > 285-297

This paper presents a novel MPEG-4 priority-based multiple video objects coding system integrating User Visual Attention Model (UVAM) and Dynamic Bit Allocation (DBA) rate control mechanism. In the proposed system, the importance of individual objects is defined automatically and the coding parameters are adaptively adjusted so that the perceptual quality of important objects is maximized. The first...

article

Coarse-to-fine stereo vision with accurate 3D boundaries

Mikhail Sizintsev, Richard P. Wildes

Image and Vision Computing > 2010 > 28 > 3 > 352-366

This paper presents methods for efficient recovery of accurate binocular disparity estimates in the vicinity of 3D surface discontinuities. Of particular concern are methods that impact coarse-to-fine, local block-based matching as it forms the basis of the fastest and the most resource efficient stereo computation procedures. A novel coarse-to-fine refinement procedure that adapts match window support...

article

Recognizing faces using Adaptively Weighted Sub-Gabor Array from a single sample image per enrolled subject

Hamidreza Rashidy Kanan, Karim Faez

Image and Vision Computing > 2010 > 28 > 3 > 438-448

In this paper, we propose a new approach for face representation and recognition based on Adaptively Weighted Sub-Gabor Array (AWSGA) when only one sample image per enrolled subject is available. Instead of using holistic representation of face images which is not effective under different facial expressions and partial occlusions, the proposed algorithm utilizes a local Gabor array to represent faces...

article

Adaptive total variation denoising based on difference curvature

Qiang Chen, Philippe Montesinos, Quan Sen Sun, Peng Ann Heng, more

Image and Vision Computing > 2010 > 28 > 3 > 298-306

Image denoising methods based on gradient dependent regularizers such as Rudin et al.’s total variation (TV) model often suffer the staircase effect and the loss of fine details. In order to overcome such drawbacks, this paper presents an adaptive total variation method based on a new edge indicator, named difference curvature, which can effectively distinguish between edges and ramps. With adaptive...

article

Accurate and speedy computation of image Legendre moments for computer vision applications

G.A. Papakostas, E.G. Karakasis, D.E. Koulouriotis

Image and Vision Computing > 2010 > 28 > 3 > 414-423

A novel algorithm that permits the fast and accurate computation of the Legendre image moments is introduced in this paper. The proposed algorithm is based on the block representation of an image and on a new image representation scheme, the Image Slice Representation (ISR) method. The ISR method decomposes a gray-scale image as an expansion of several two-level images of different intensities (slices)...

article

Palmprint authentication using a symbolic representation of images

Jiansheng Chen, Yiu-Sang Moon, Ming-Fai Wong, Guangda Su

Image and Vision Computing > 2010 > 28 > 3 > 343-351

A new branch of biometrics, palmprint authentication, has attracted increasing amount of attention because palmprints are abundant of line features so that low resolution images can be used. In this paper, we propose a new texture based approach for palmprint feature extraction, template representation and matching. An extension of the SAX (Symbolic Aggregate approXimation), a time series technology,...

article

An efficient approach for the removal of impulse noise from the corrupted image using neural network based impulse detector

G. Kaliraj, S. Baskar

Image and Vision Computing > 2010 > 28 > 3 > 458-466

A new efficient approach to detect the impulse noise from the corrupted image using feed forward neural network (FFNN) is presented. A modified version of the arithmetic mean filter is proposed to remove the detected impulse noise. The performance of proposed noise detection approach is analyzed using the performance measures such as False Alarm Ratio (FAR), Missed Noise (MN) pixels and Falsely Detected...

article

Automatic textile image annotation by predicting emotional concepts from visual features

Yunhee Shin, Youngrae Kim, Eun Yi Kim

Image and Vision Computing > 2010 > 28 > 3 > 526-537

This paper presents an emotion prediction system that can automatically predict certain human emotional concepts from a given textile. The main application motivating this study is textile image annotation, which has recently rapidly expanded in relation to the Web. In the proposed method, color and pattern are used as cues to predict the emotional semantics associated with an image, where these features...

article

Human detection using a mobile platform and novel features derived from a visual saliency mechanism

Sebastian Montabone, Alvaro Soto

Image and Vision Computing > 2010 > 28 > 3 > 391-402

Human detection is a key ability to an increasing number of applications that operates in human inhabited environments or needs to interact with a human user. Currently, most successful approaches to human detection are based on background substraction techniques that apply only to the case of static cameras or cameras with highly constrained motions. Furthermore, many applications rely on features...

article

Novel fractal image encoding algorithm using normalized one-norm and kick-out condition

Hsiu-Niang Chen, Kuo-Liang Chung, Jian-Er Hung

Image and Vision Computing > 2010 > 28 > 3 > 518-525

For fractal image encoding, based on a special measure called the one-norm of normalized block, this paper presents a novel kick-out method to discard impossible domain blocks in early stage for the current range block. It leads to speed up the encoding time. Since our proposed kick-out method is based on Jacquin’s full search method, both methods need to search the whole image and the decoded image...

article

Colour, texture, and motion in level set based segmentation and tracking

Thomas Brox, Mikaël Rousson, Rachid Deriche, Joachim Weickert

Image and Vision Computing > 2010 > 28 > 3 > 376-390

This paper introduces an approach for the extraction and combination of different cues in a level set based image segmentation framework. Apart from the image grey value or colour, we suggest to add its spatial and temporal variations, which may provide important further characteristics. It often turns out that the combination of colour, texture, and motion permits to distinguish object regions that...

article

Camera motion estimation by tracking contour deformation: Precision analysis

G. Alenyà, C. Torras

Image and Vision Computing > 2010 > 28 > 3 > 474-490

An algorithm to estimate camera motion from the progressive deformation of a tracked contour in the acquired video stream has been previously proposed. It relies on the fact that two views of a plane are related by an affinity, whose six parameters can be used to derive the six degrees-of-freedom of camera motion between the two views. In this paper we evaluate the accuracy of the algorithm. Monte...

article

On the accuracy of image normalization by Zernike moments

Zhengwu Yang, Tao Fang

Image and Vision Computing > 2010 > 28 > 3 > 403-413

Zernike Moment (ZM) is an effective region-based shape representation technique. The extracted ZM features should be independent of scale, position and orientation, which can be achieved by ZM-based image normalization. Nevertheless, due to the discretization of digital image and the presence of noise, the normalization is imperfect. Thus, in practice Zernike Moment Invariants (ZMI) cannot perfectly...

article

Eye synthesis using the eye curve model

Lei Xiong, Nanning Zheng, Jianyi Liu, Shaoyi Du, more

Image and Vision Computing > 2010 > 28 > 3 > 329-342

Eyes are a critical part in exhibiting facial expressions. Because of the appearance diversity of eyes due to motion, it is difficult to synthesize eye with a particular facial expression. Traditional methods have failed to adequately catch motion-related appearance changes. In order to generate a photorealistic expression eye, we propose a two-step method. First, we propose a curve-based model to...

article

Fast and accurate geodesic distance transform by ordered propagation

Rubén Cárdenes, Carlos Alberola-López, Juan Ruiz-Alzola

Image and Vision Computing > 2010 > 28 > 3 > 307-316

In this paper, we present a new geodesic distance transform that uses a non-Euclidean metric suitable for non-convex discrete 2D domains. The geodesic metric used is defined as the shortest path length through a set of pixels called Locally Nearest Hidden Pixels, and manages visibility zones using bounding angles. The algorithm is designed using ordered propagation, which makes it extremely efficient...

article

Equidistant (fθ) fish-eye perspective with application in distortion centre estimation

Ciarán Hughes, Robert McFeely, Patrick Denny, Martin Glavin, more

Image and Vision Computing > 2010 > 28 > 3 > 538-551

Radial distortion in an image is a geometric distortion that causes a non-linear variation in resolution across the image, with a higher spatial resolution in the central areas of the image, and lower resolution in the peripheral areas of the image. This is particularly evident in fish-eye cameras, with very wide fields-of-view. Equidistant fish-eye cameras are designed such that the distance between...

article

Micro-crack inspection in heterogeneously textured solar wafers using anisotropic diffusion

Du-Ming Tsai, Chih-Chieh Chang, Shin-Min Chao

Image and Vision Computing > 2010 > 28 > 3 > 491-501

This paper proposes a machine vision scheme for detecting micro-crack defects in solar wafer manufacturing. The surface of a polycrystalline silicon wafer shows heterogeneous textures, and the shape of a micro-crack is similar to the multi-grain background. They make the automated visual inspection task extremely difficult.The low gray-level and high gradient are two main characteristics of a micro-crack...

article

Adaptive pyramid mean shift for global real-time visual tracking

Shu-Xiao Li, Hong-Xing Chang, Cheng-Fei Zhu

Image and Vision Computing > 2010 > 28 > 3 > 424-437

Tracking objects in videos using the mean shift technique has attracted considerable attention. In this work, a novel approach for global target tracking based on mean shift technique is proposed. The proposed method represents the model and the candidate in terms of background weighted histogram and color weighted histogram, respectively, which can obtain precise object size adaptively with low computational...

article

Self-calibration of spherical rectification for a PTZ-stereo system

Dingrui Wan, Jie Zhou

Image and Vision Computing > 2010 > 28 > 3 > 367-375

Since PTZ (pan–tilt–zoom) camera is able to obtain multi-view-angle and multi-resolution information, PTZ-stereo system using two PTZ cameras has much higher capability and flexibility compared with traditional stereo system. In this paper, we propose a self-calibration framework to deal with the calibration of spherical rectification, which can be deemed as a kind of relative pose estimation, for...

article

An MRF-based kernel method for nonlinear feature extraction

Pi-Fuei Hsieh, Po-Wen Chou, Hsueh-Yi Chung

Image and Vision Computing > 2010 > 28 > 3 > 502-517

Nonlinear kernel-based feature extraction algorithms have recently been proposed to alleviate the loss of class discrimination after feature extraction. When considering image classification, a kernel function may not be sufficiently effective if it depends only on an information resource from the Euclidean distance in the original feature space. This study presents an extended radial basis kernel...

Number:
3
Volume:
28
Year:
2010

Publication date

Set your own date range

Keywords

COMPUTER VISION (2)
FEATURE EXTRACTION (2)
3D DIGITAL IMAGES (1)
ACTIVE CONTOURS (1)
ADAPTIVE LEVEL (1)
ADAPTIVELY WEIGHTED SUB-GABOR ARRAY (1)
AFFECTIVE FEATURES (1)
ANISOTROPIC DIFFUSION (1)
AUTOMATIC IMAGE ANNOTATION (1)
AUTOMATIC SEGMENTATION (1)
BIOMETRICS (1)
CAMERA CALIBRATION (1)
CLASSIFICATION (1)
COARSE-TO-FINE (1)
CONVENTIONAL FULL SEARCH (1)
DCT INNER PRODUCT (1)
DEFECT DETECTION (1)
DIFFERENCE CURVATURE (1)
DIMENSIONALITY REDUCTION (1)
DISTANCE TRANSFORM (1)
DISTORTION CENTRE (1)
DYNAMIC BIT ALLOCATION (1)
EGOMOTION ESTIMATION (1)
EMOTION RECOGNITION (1)
EQUIDISTANT PROJECTION (1)
FACE RECOGNITION (1)
FACIAL EXPRESSION SYNTHESIS (1)
FAST MEAN SHIFT (1)
FISH-EYE (1)
FRACTAL ENCODING (1)
GABOR WAVELET (1)
GEODESIC DISTANCE TRANSFORM (1)
GEODESIC METRIC (1)
GLOBAL VISUAL TRACKING (1)
GRAPH CUTS (1)
HETEROGENEOUS TEXTURE (1)
HIDDEN PIXELS (1)
HUMAN DETECTION (1)
IMAGE BLOCK REPRESENTATION (1)
IMAGE DENOISE (1)
IMAGE FILTERING (1)
IMAGE NORMALIZATION (1)
IMAGE PROCESSING (1)
IMAGE QUALITY (1)
IMAGE REGULARIZATION (1)
IMAGE SEGMENTATION (1)
IMAGE WARPING (1)
IMPULSE DETECTOR (1)
IMPULSE NOISE (1)
KERNEL TRICK (1)
KERNEL-BASED TRACKING (1)
KICK-OUT RULE (1)
LEGENDRE MOMENTS (1)
LEVEL SET METHODS (1)
LOSS OF DETAILS (1)
LOSSY PROGRESSIVE TRANSMISSION (1)
MICRO-CRACK (1)
MOTION (1)
MOVING CAMERAS (1)
MPEG-4 (1)
NEURAL NETWORK (1)
NONLINEAR DIFFUSION (1)
NORMALIZED ONE-NORM (1)
OCCLUSIONS (1)
ORDERED PROPAGATION (1)
PALMPRINT AUTHENTICATION (1)
PARTIAL OCCLUSION (1)
PATTERN RECOGNITION (1)
PERSPECTIVE (1)
PRECISION ANALYSIS (1)
PRIORITY (1)
PTZ-STEREO SYSTEM (1)
REAL-TIME ALGORITHMS (1)
REGION OF INTEREST (ROI) TRANSMISSION (1)
SCALE SPACE (1)
SELF-CALIBRATION (1)
SEMANTICS (1)
SHAPE MODELING (1)
SHAPE MODELLING (1)
SINGLE MODEL DATABASE (1)
SINGULAR VALUE DECOMPOSITION ENCODING (1)
SOLAR WAFER (1)
SORTING IMAGES (1)
SPHERICAL RECTIFICATION (1)
STAIRCASE EFFECT (1)
STEREO (1)
SYMBOLIC REPRESENTATION (1)
TEXTILE IMAGE RETRIEVAL: NEURAL NETWORK (1)
TEXTURE (1)
TIME SERIES (1)
TOTAL VARIATION (1)
TRACKING (1)
TRACKING AND POINTING SUBSYSTEM (1)
UNSCENTED TRANSFORMATION (1)
VIDEO CODING (1)
VIDEO OBJECT (1)
VISIBILITY (1)
VISUAL ATTENTION (1)
VISUAL FEATURES (1)
VISUAL SALIENCY (1)
more

INFONA - science communication portal

Image and Vision Computing

Object-based video coding with dynamic quality control

Coarse-to-fine stereo vision with accurate 3D boundaries

Recognizing faces using Adaptively Weighted Sub-Gabor Array from a single sample image per enrolled subject

Adaptive total variation denoising based on difference curvature

Accurate and speedy computation of image Legendre moments for computer vision applications

Palmprint authentication using a symbolic representation of images

An efficient approach for the removal of impulse noise from the corrupted image using neural network based impulse detector

Automatic textile image annotation by predicting emotional concepts from visual features

Human detection using a mobile platform and novel features derived from a visual saliency mechanism

Novel fractal image encoding algorithm using normalized one-norm and kick-out condition

Colour, texture, and motion in level set based segmentation and tracking

Camera motion estimation by tracking contour deformation: Precision analysis

On the accuracy of image normalization by Zernike moments

Eye synthesis using the eye curve model

Fast and accurate geodesic distance transform by ordered propagation

Equidistant (fθ) fish-eye perspective with application in distortion centre estimation

Micro-crack inspection in heterogeneously textured solar wafers using anisotropic diffusion

Adaptive pyramid mean shift for global real-time visual tracking

Self-calibration of spherical rectification for a PTZ-stereo system

An MRF-based kernel method for nonlinear feature extraction

Filter options

Publication date

Keywords

INFONA - science communication portal

Image and Vision Computing

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Reporting an error / abuse

Sending the report failed

Accessibility options