Proceeding of Southwest Symposium on Image Analysis and Interpretation

8-9 April 1996

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  • Proceeding of Southwest Symposium on Image Analysis and Interpretation

    Publication Year: 1996
    Request permission for reuse | PDF file iconPDF (152 KB)
    Freely Available from IEEE
  • Using local pyramids for more robust object delineation

    Publication Year: 1996, Page(s):1 - 6
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Multiresolution techniques are often used for image segmentation, emulating the human visual process. More precisely, image pyramids are especially well adapted for multiresolution representation. A new concept is proposed that uses a pyramid approach in image segmentation, by simulating the human vision in its attention focusing process. The method introduces local pyramids in reply to inherent l... View full abstract»

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  • Wavelet methods for extracting objects from complex backgrounds

    Publication Year: 1996, Page(s):7 - 12
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1181 KB)

    In previous work we use B-spline wavelets to detect Gaussian objects in Markov noise. The authors now generalize the method and use it to adaptively enhance images according to the detector output. They examine a class of multiscale matched filters implemented using the wavelet transform, and show how these filters may be employed to detect objects in complex backgrounds. In two contrasting applic... View full abstract»

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  • Fractional pyramids for color image segmentation

    Publication Year: 1996, Page(s):13 - 17
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (327 KB)

    We describe a pyramid structure introduced by Burt (1981) called fractional pyramid. That structure is based on the rigid Gaussian pyramid. In such a structure the reduction factor between two level is given by a fraction k/sub 1//k/sub 2/. This presents the advantage of increasing the number of levels, and slows the loss of information during the construction of the different levels of the pyrami... View full abstract»

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  • Contextual simulation of landscape based on remotely sensed data

    Publication Year: 1996, Page(s):18 - 23
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (633 KB)

    An observed image can be considered as a single sample of a stochastic process under an assumed model. It is often desirable to generate a multitude of scenes which have the same stochastic properties as the original scene as a means of evaluating and validating proposed models. A class of stochastic models has been developed to characterize landscape processes represented in multispectral imagery... View full abstract»

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  • Processing issues in the automated inspection of power insulators

    Publication Year: 1996, Page(s):24 - 29
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (651 KB)

    In this paper, we present an approach to automated inspection of power insulators. In constructing the program, we have analyzed the potential options in processing that affect the inspection process. The location of the insulator is first determined by using a binary template matching process. Then, the disks of the insulator are extracted by a filtering operation. We have compared the performanc... View full abstract»

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  • Reduced-dimension and wavelet processing of SMD images for real-time inspection

    Publication Year: 1996, Page(s):30 - 36
    Cited by:  Papers (9)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (742 KB)

    This paper presents a technique that uses a linear projection of images and other processing steps to arrive at a one-dimensional multiplierless correlation. This operation is used to detect the presence or absence of surface mounted devices (SMDs) in the inspection of printed circuit boards. Images with two types of illuminations are processed to produce two different decision schemes: one to det... View full abstract»

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  • Automated classification of small jet engine parts

    Publication Year: 1996, Page(s):37 - 42
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Manual part sorting of small jet engine parts can be a tedious process. Because of personnel shortages, the Small Parts office at Kelly AFB, in San Antonio, Texas, has difficulty in keeping up with the backlog of parts that need to be sorted for engine reassembly. Currently, there is a system being developed by the Robotics and Automation Center of Excellence (RACE) at Kelly that will help the Sma... View full abstract»

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  • Development of a neutron imaging facility at the University of Texas TRIGA reactor

    Publication Year: 1996, Page(s):43 - 47
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    A neutron imaging facility for computed tomography and real-time neutron radiography is currently being developed at the University of Texas TRIGA reactor. The neutron imaging system consists of neutron collimator system, real-time neutron imaging system, and computer systems. Monte Carlo calculations were used to design the neutron collimator system. The neutron imaging system will be used for ma... View full abstract»

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  • Micrograph analysis and image understanding

    Publication Year: 1996, Page(s):48 - 53
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (615 KB)

    Automating the analysis of rock section micrograph images is shown to present challenging problems analogous to those encountered in more general image understanding. Occlusion structures must be identified for a meaningful analysis of the images, and strategies for detecting these structures are presented. The method uses perceptual grouping principles. The identification of crystal faces on a cr... View full abstract»

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  • Enhanced snakes algorithm for contour detection

    Publication Year: 1996, Page(s):54 - 59
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (626 KB)

    The contour based technique has been proven to be an effective approach in object recognition. This paper describes an enhanced snakes algorithm (ESA) for contour detection. In ESA, a novel split and merge technique is added to the original snakes model so as to enhance the model to support concave object contour detection. A set of images is selected to evaluate the proposed algorithm and the res... View full abstract»

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  • Handwritten picture language for effective pattern recognition

    Publication Year: 1996, Page(s):60 - 65
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    There exist many techniques for automatic beautification from handwritten pictures. Some pictures, however, still remain after any sort of recognition is used. In fact, some handwritten pictures can be recognized easily and others are difficult to recognize. We design a handwritten picture language which is composed of pictures already known to be recognized easily. The user draws an original pict... View full abstract»

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  • Image analysis operators as concept constructors

    Publication Year: 1996, Page(s):66 - 70
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    We present a new approach for the modeling of image processing operators. This model accounts for the information transformations made by the operators, and describes precisely the produced entities intervening as visual cues. Therefore, an operator sequence is considered as a concept constructor supplying a description of the concepts of specifics fields. First, we describe the elementary compone... View full abstract»

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  • Fully automated media and lumen boundary detection in intravascular ultrasound images

    Publication Year: 1996, Page(s):71 - 75
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (353 KB)

    Intravascular ultrasound (IVUS) imaging is a valuable method of quantifying the degree and severity of coronary atherosclerosis. Development of an automated method of this quantification has been hampered by the difficulty in automating the extraction of the lumen-intima interface and the media-adventitia interface. The authors describe how these interfaces can be automatically extracted using a c... View full abstract»

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  • Labelling tissues in anatomical images of the Visible Human project

    Publication Year: 1996, Page(s):76 - 79
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (359 KB)

    The authors describe early experience in labelling anatomical slices from the Visible Human project. The goal is to analyze approximately 1800 digitized color photos of the human body and produce a 3D volume data set whose voxels integers are encoded with tissue types. The approach is a mixture of traditional pattern recognition and an interactive user interface. View full abstract»

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  • Ultrasound imaging to track the advance of coagulation front in laser irradiated tissue

    Publication Year: 1996, Page(s):80 - 84
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (475 KB)

    Several theoretical models have been developed to predict the advance of the coagulation front in a laser irradiated tissue. However, there exists a keen interest in obtaining experimental feedback methods to better understand and monitor the response of tissue to laser irradiation in surgical and therapeutic procedures, In this work, an attempt was made to track the advancement of the coagulation... View full abstract»

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  • A planar ultrasonic tomography using shear waves

    Publication Year: 1996, Page(s):85 - 88
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    The authors study the effect of using shear waves in scanning acoustic microscopy in which the specimens are solid. For any specimen with a shear modulus immersed in the microscope's water bath, mode conversion will take place at the water-solid interface. In order to compare the operation of shear-wave tomography with that of longitudinal-wave tomography the authors have simulated tomographic rec... View full abstract»

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  • An artificial retina for SAR object recognition

    Publication Year: 1996, Page(s):89 - 94
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (602 KB)

    A conceptual model of an artificial retina has been developed for object recognition in synthetic aperture radar (SAR) imagery. Candidate strategies for the development of mechanisms within the artificial retina were derived by comparing and contrasting principles that underlie the human visual experience, from the statistical behaviour of SAR returns, and from published studies of mammalian neuro... View full abstract»

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  • A real-time histographic approach to road sign recognition

    Publication Year: 1996, Page(s):95 - 100
    Cited by:  Papers (24)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (625 KB)

    This paper presents the development and real-time implementation of an algorithm capable of recognizing stop, yield, and do-not-enter traffic warning signs. It consists of six modules: color segmentation, edge localization, RGB differencing, edge detection, histograph extraction, and classification. RGB transformed pixels are sparsely segmented and sequentially XOR-ed to localize edge areas. RGB d... View full abstract»

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  • Three-dimensional road recognition from single two-dimensional image

    Publication Year: 1996, Page(s):101 - 105
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (362 KB)

    A new method to perform three-dimensional road recognition from a single two-dimensional image is proposed. Based on road edges which are characterized by properties of matching points, Euler angles between camera-centered coordinates and edge-centered coordinates can be evaluated and thus the depth information of edge points can be obtained from resultant perspective projections of matching point... View full abstract»

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  • Tracking holes: using animation to visualize absent features

    Publication Year: 1996, Page(s):106 - 111
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (679 KB)

    Sequences of scenes containing interacting objects require careful analysis and presentation to assist viewers in understanding object motion. This paper discusses an approach for detecting and visualizing absent features in a series of images containing moving objects. A minimum area invariant is introduced to classify objects by their states. The availability of such state information permits si... View full abstract»

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  • Target tracking using the anisotropic diffusion pyramid

    Publication Year: 1996, Page(s):112 - 116
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Forward-looking infrared (FLIR) systems are used to identify targets based on their features and emissions. With the new generation of FLIR systems that can produce sixty or more high resolution frames per second, multiscale algorithms that can operate accurately and efficiently in a variety of battlefield situations are paramount. The popular Gaussian pyramid tends to distort and even destroy obj... View full abstract»

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  • Tracking cell splits and merges

    Publication Year: 1996, Page(s):117 - 122
    Cited by:  Papers (8)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (558 KB)

    The key to tracking and analyzing histories of evolving structures is accurately mapping the structures to their corresponding ancestors. Without this mapping, no comparisons can be made of structure evolution over time. This paper describes an efficient method of mapping histories of large-scale evolving structures in order to track them over extended periods-without the need for complex computat... View full abstract»

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  • Iterative estimation of the relative spatial poses of a robot end effector and target object

    Publication Year: 1996, Page(s):123 - 128
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (789 KB)

    A technique for finding the relative spatial pose between a robotic end effector and a target object to be gasped without a priori knowledge of the spatial relationship between the camera and the robot is presented. A previously developed technique is used to determine the pose of the end effector and a target object relative to the camera. The transformation between the camera's and the robot's c... View full abstract»

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  • Color image coding using wavelet pyramid coders

    Publication Year: 1996, Page(s):129 - 134
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (623 KB)

    Despite the existence of the current standard for still image compression namely JPEG (Joint Photographic Experts Group), alternative techniques for image compression are being investigated due to the need for fast and high quality storage and transmission of large datasets for distribution through the Internet or in CD-ROM. The use of the wavelet transform for multi-resolution pyramid decompositi... View full abstract»

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