Research Interests:
We address the problem of suppressing facial expressions in videos because expressions can hinder the retrieval of important information in applications such as face recognition. To achieve this, we present an optical strain suppression... more
We address the problem of suppressing facial expressions in videos because expressions can hinder the retrieval of important information in applications such as face recognition. To achieve this, we present an optical strain suppression method that removes any facial expression without requiring training for a specific expression. For each frame in a video, an optical strain map that provides the strain magnitude value at each pixel is generated; this strain map is then utilized to neutralize the expression by replacing pixels of high strain values with pixels from a reference face frame. Experimental results of testing the method on various expressions namely happiness, sadness, and anger for two publicly available data sets (i.e., BU-4DFE and AM-FED) show the ability of our method in suppressing facial expressions.
Research Interests:
A sequence of images contains more information than a single image. Due to this reason, image sequence analysis has been used in computer vision for quite some time. In particular, using a sequence of images is useful for object detection... more
A sequence of images contains more information than a single image. Due to this reason, image sequence analysis has been used in computer vision for quite some time. In particular, using a sequence of images is useful for object detection when the camera moves relative to the object. Due to the relative motion, objects at different distances from the camera have different image motion. Using this property, one can obtain information on structure of the 3-D scene as well as the relative motion between the camera and the scene. Furthermore, the individual images are corrupted by camera noise. Using a sequence of images enables us to suppress this noise and detect low-contrast objects more reliably. In this research, image sequence analysis is used for detection of objects in 3-D space as well as on planar surfaces. The work would be useful for detecting obstacles in the flight path of an aircraft. The research also explores the use of these principles for segmenting scene text objects...
Research Interests:
A new method for extraction and temporal segmentation of multiple motion trajectories in human motion is presented. Motion trajectories are very compact and are representative features for activity recognition. The proposed method... more
A new method for extraction and temporal segmentation of multiple motion trajectories in human motion is presented. Motion trajectories are very compact and are representative features for activity recognition. The proposed method extracts motion trajectories generated by body parts without any initialization or any assumption of color distribution. Tracking human body parts (hands and feet) is difficult because the body parts which generate most of the motion trajectories are relatively small in relation to the human body. This problem is overcome by using a new motion segmentation method. At every frame, candidate motion locations are detected and set as Significant Motion Points (SMPs). The motion trajectories are obtained by combining SMPs with the color-optical flow based tracker results. But when a person's location is not static (e.g. walking or jumping), hand or leg movements generate different motion trajectories which are recognized as different movements. A new method...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
* Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery time. No discounts or returns apply. ... Standard delivery in the US is 7 to 10 business days and outside the US delivery is 4 to 6 weeks or... more
* Available as a photocopy reprint only. Allow two weeks reprinting time plus standard delivery time. No discounts or returns apply. ... Standard delivery in the US is 7 to 10 business days and outside the US delivery is 4 to 6 weeks or longer. For further details, please see shipping policy. ... Listed below are the papers found in this volume. Click the paper title to view an abstract or to order an individual paper. ... Author(s): Adel I. El-Fallah; Gary E. Ford; V. Ralph Algazi; Robert R. Estes, Jr. ... We have recently proposed the use of geometry in image processing by ...
Research Interests:
In this paper we describe our recent research efforts towards reliable and automatic generation of indices for use in content understanding of video. Following our earlier research in temporal shot segmentation of video, we have developed... more
In this paper we describe our recent research efforts towards reliable and automatic generation of indices for use in content understanding of video. Following our earlier research in temporal shot segmentation of video, we have developed a comprehensive system framework for segmenting an unconstrained variety of text from general purpose broadcast video. In addition, the framework also contains a novel tracking and a binarization algorithm. Also developed to be a part of the above framework are other modules, viz. a novel scene text segmentation method, and a novel text segmentation method which extracts uniform colored text from still video frames. We have thoroughly evaluated the methods which form a part of our framework against a fairly large dataset. The framework applies a battery of methods for reliable localization and extraction of text regions. Towards this, we have developed methods for fusing the results from different methods. More recently, we have extended our intere...
Research Interests:
It is my pleasure to present this first issue of the IEEE Transactions on Mobile Computing. The tremendous growth in mobile computing and related fields over the past few years created a need for an archival journal to publish the latest... more
It is my pleasure to present this first issue of the IEEE Transactions on Mobile Computing. The tremendous growth in mobile computing and related fields over the past few years created a need for an archival journal to publish the latest research results and facilitate better understanding of the mobility paradigms, including architectures, algorithms and protocols, environments, and applications. We anticipate that this Transactions will be of interest to readers and authors working in all areas of computer-communication and ...
There is a host of open issues in the graphics recognition research area, and there is no doubt as to the viability and growing importance of the field. Contribution has already been made in specialized areas, for instance, for telephone... more
There is a host of open issues in the graphics recognition research area, and there is no doubt as to the viability and growing importance of the field. Contribution has already been made in specialized areas, for instance, for telephone and power companies which hold huge numbers of drawings with the same syntax and appearance, making the development of a specialized system for processing them cost effective. Image and graphical document databases are two multimedia-enabling technologies that seem to be heavy consumers of ...
Graphical representation of cartocraphic data consists of symbols assigned to physical entities, interconnections to denote spatial and structural relationships among such symbols, and text to describe and identify these symbols and... more
Graphical representation of cartocraphic data consists of symbols assigned to physical entities, interconnections to denote spatial and structural relationships among such symbols, and text to describe and identify these symbols and interconnections. An image understanding system to extract useful information from geographical maps is proposed. Pattern recognition techniques are applied to identify geometrical forms of various symbols. For each valid symbol identified, a set of files is created to store pertinent structural ...
Research Interests: Engineering, Civil Engineering, Analytical Chemistry, Computer Networks, Engineering Geology, and 15 moreExploration Geophysics, Clinical Chemistry, Electroanalytical Chemistry, Discriminant Analysis, expert System, Eigenvalues, EXTRACTION, Clinical Sciences, Early Warning Systems, Data Processing, Attack, Earthquake Prediction, Active Fault, Data Consistency, and Eigenvectors
Research Interests: Distributed Computing, Resource Allocation, Video Processing, Computer Hardware and Networking, Computer Software, and 12 moreProgram Development, Hardware, Code Generation, Cost effectiveness, Throughput, Message Passing, OPTIMIZATION TECHNIQUE, Scheduling Algorithm, Code Generator, Parallel Architecture, Commercial Off-The-Shelf, and Concurrent Computing
Abstract The paper describes a method for interpretation of lines in distributing frame drawings of a telephone company. The lines are composed of hierarchical components: intersections, segments and line links. First, intersections are... more
Abstract The paper describes a method for interpretation of lines in distributing frame drawings of a telephone company. The lines are composed of hierarchical components: intersections, segments and line links. First, intersections are located. Segments of lines are then detected. Adjacent segments are finally linked into a line. A post processing step refines the lines. The line extraction and classification are insensitive to touching characters and broken lines. A number of experimental results using real drawings demonstrate good ...
Research Interests:
Research Interests:
Wires can be hardly visible and thus present a serious hazard to rotorcrafts flying at low altitudes. Vision systems capable of detecting wires in time to avoid collisions must be able to find in the input images curves less than one or... more
Wires can be hardly visible and thus present a serious hazard to rotorcrafts flying at low altitudes. Vision systems capable of detecting wires in time to avoid collisions must be able to find in the input images curves less than one or two pixels wide. This paper describes a study on the performance of wire detection using a sub-pixel edge
Research Interests:
In the late 1980's, the prevalence of fast computers, large computer memory, and inexpensive scanners fostered an increasing interest in document image analysis. With many paper documents being sent and received... more
In the late 1980's, the prevalence of fast computers, large computer memory, and inexpensive scanners fostered an increasing interest in document image analysis. With many paper documents being sent and received via fax machines and being stored digitally in large document databases, the interest grew to do more with these images than simply view and print them. Just as humans extract information from these images, research was performed and commercial systems built to read text on a page, to find fields on a form, ...
Research Interests:
Abstract A system for reading text data from microfilm images of punched cards is described. The input is a high resolution gray level image obtained by scanning the card image from the microfilm. Noise due to the poor quality of... more
Abstract A system for reading text data from microfilm images of punched cards is described. The input is a high resolution gray level image obtained by scanning the card image from the microfilm. Noise due to the poor quality of microfilm data and similarity in gray levels of noise patches and punches are the major problems for text extraction. Thresholding, skew correction and morphological operations are performed on the input gray level image. Card parameters such as positions of punches, etc., are calculated and used along with the ...
Research Interests:
Abstract: A novel, linear modeling method to model a face recognition algorithm based on the match scores produced by the algorithm. Starting with a distance matrix representing the pair-wise match scores between face images, an iterative... more
Abstract: A novel, linear modeling method to model a face recognition algorithm based on the match scores produced by the algorithm. Starting with a distance matrix representing the pair-wise match scores between face images, an iterative stress minimization algorithm is used to obtain an embedding of the distance matrix in a low-dimensional space. A linear transformation used to project new face images into the model space is divided into two sub-transformations: a rigid transformation of face images obtained through principal ...
Research Interests:
Abstract A method is presented for identifying the views in an engineering drawing along with their associated view points in preparation for 3D interpretation of the object shape. A formal procedure is developed for constructing a set of... more
Abstract A method is presented for identifying the views in an engineering drawing along with their associated view points in preparation for 3D interpretation of the object shape. A formal procedure is developed for constructing a set of view-based coordinate systems that act as intermediate 2.5 D coordinates to relate the 2D drawing-based coordinates to the 3D object-based coordinates. The method can accommodate auxiliary views in addition to the standard orthogonal set, and the number of views and their layout in the drawing need not ...
Research Interests:
Abstract A system for extraction of structural information of a table from its image is discussed. Following the initial binarization and deskewing operations, the image is scanned to extract all horizontal and vertical lines that are... more
Abstract A system for extraction of structural information of a table from its image is discussed. Following the initial binarization and deskewing operations, the image is scanned to extract all horizontal and vertical lines that are present. The table's dimensions are estimated based on these lines. Unlike other systems, the procedure described does not depend on the sole existence of lines to mark the item blocks. White streams are recognized in both the horizontal and vertical direction as substitutes for any missing demarcation ...
Research Interests:
Research Interests:
Abstract. A method for automating the analysis of images generated from the Fourier imaging (Fl) process is described. Fourier imaging is used to observe the evolving topography of wafers as they are being etched in a reactive ion etcher.... more
Abstract. A method for automating the analysis of images generated from the Fourier imaging (Fl) process is described. Fourier imaging is used to observe the evolving topography of wafers as they are being etched in a reactive ion etcher. The focus of the research described in this paper is the segmentation and analysis of images generated from Fl. A brief overview of the theory of Fl is presented. Segmentation of a Fourier image is done in three steps; local maxima detection, Fourier component extent identification, and ...
Research Interests:
Localization, recognition, and interpretation of graphical objects such as line art, maps and engineering drawings in document images has been a topic of much research attention in recent years. A comprehensive overview of research... more
Localization, recognition, and interpretation of graphical objects such as line art, maps and engineering drawings in document images has been a topic of much research attention in recent years. A comprehensive overview of research problems, solution procedures and typical systems for graphics recognition was published in 1990 [KasRam90] and an update was published in 1994 [AriKas94]. In this paper we provide a further update on the state of research in graphics recognition with a particular emphasis on those systems which have ...
Research Interests:
Abstract The paper describes a method for interpretation of lines in distributing frame drawings of a telephone company. The lines are composed of hierarchical components: intersections, segments and line links. First, intersections are... more
Abstract The paper describes a method for interpretation of lines in distributing frame drawings of a telephone company. The lines are composed of hierarchical components: intersections, segments and line links. First, intersections are located. Segments of lines are then detected. Adjacent segments are finally linked into a line. A post processing step refines the lines. The line extraction and classification are insensitive to touching characters and broken lines. A number of experimental results using real drawings demonstrate good ...
Research Interests:
Abstract The aim of this study is to investigate a data mining approach to help assess consequences of oil spills in the maritime environment. The approach under investigation is based on detecting suspected oil droplets in the water... more
Abstract The aim of this study is to investigate a data mining approach to help assess consequences of oil spills in the maritime environment. The approach under investigation is based on detecting suspected oil droplets in the water column adjacent to the Deepwater Horizon oil spill. Our method automatically detects particles in the water, classifies them and provides an interface for visual display. The particles can be plankton, marine snow, oil droplets and more. The focus of this approach is to generalize the methodology utilized for ...
Research Interests:
ABSTRACT