By Topic

Pattern Analysis and Machine Intelligence, IEEE Transactions on

Issue 3 • Date Mar 1995

Filter Results

Displaying Results 1 - 10 of 10
  • Uniqueness of solutions to three perspective views of four points

    Publication Year: 1995 , Page(s): 303 - 307
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (456 KB)  

    We show that there is, in general, a unique solution for the relative orientation of three cameras simultaneously photographing four feature points on a fixed object. However, multiple solutions are possible, in rare cases, even when the four feature points are not coplanar View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic programming for detecting, tracking, and matching deformable contours

    Publication Year: 1995 , Page(s): 294 - 302
    Cited by:  Papers (144)  |  Patents (31)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (808 KB)  

    The problem of segmenting an image into separate regions and tracking them over time is one of the most significant problems in vision. Terzopoulos et al. (1987) proposed an approach to detect the contour regions of complex shapes, assuming a user selected initial contour not very far from the desired solution. We propose to further explore the information provided by the user's selected points an... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Model-based shape matching with structural feature grouping

    Publication Year: 1995 , Page(s): 315 - 320
    Cited by:  Papers (12)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    An essential problem in online handwriting recognition is the shape variation along with the variety of stroke number and stroke order. In this paper we present a clear and systematic approach to shape matching based on structural feature grouping. To cope with topological deformations caused by stroke connection and breaking, we incorporate some aspects of top-down approaches systematically into ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A mechanism of automatic 3D object modeling

    Publication Year: 1995 , Page(s): 307 - 311
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (452 KB)  

    The symbolic representation of 3D objects is the fundamental knowledge for computer systems to understand the environment. This knowledge is usually assumed to exist in a computer but can also be acquired by accumulating spatial features extracted from sensory inputs at different viewing directions. This paper first investigates surface visibility and, then, after introducing mass vector chains (M... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Local invariants for recognition

    Publication Year: 1995 , Page(s): 226 - 238
    Cited by:  Papers (27)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1068 KB)  

    Geometric invariants are shape descriptors that remain unchanged under geometric transformations such as projection or changing the viewpoint. A new method of obtaining local projective and affine invariants is developed and implemented for real images. Being local, the Invariants are much less sensitive to occlusion than global invariants. The invariants' computation is based on a canonical metho... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cluster expansions for the deterministic computation of Bayesian estimators based on Markov random fields

    Publication Year: 1995 , Page(s): 275 - 293
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1384 KB)  

    We describe a family of approximations, denoted by “cluster approximations”, for the computation of the mean of a Markov random field (MRF). This is a key computation in image processing when applied to the a posteriori MRF. The approximation is to account exactly for only spatially local interactions. Application of the approximation requires the solution of a nonlinear multivariable ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Evaluation of binarization methods for document images

    Publication Year: 1995 , Page(s): 312 - 315
    Cited by:  Papers (132)  |  Patents (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (412 KB)  

    This paper presents an evaluation of eleven locally adaptive binarization methods for gray scale images with low contrast, variable background intensity and noise. Niblack's method (1986) with the addition of the postprocessing step of Yanowitz and Bruckstein's method (1989) added performed the best and was also one of the fastest binarization methods View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sensor modeling, probabilistic hypothesis generation, and robust localization for object recognition

    Publication Year: 1995 , Page(s): 252 - 265
    Cited by:  Papers (48)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1320 KB)  

    In an effort to make object recognition efficient and accurate enough for real applications; we have developed three probabilistic techniques-sensor modeling, probabilistic hypothesis generation, and robust localization-which form the basis of a promising paradigm for object recognition. Our techniques effectively exploit prior knowledge to reduce the number of hypotheses that must be tested durin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Accurate recovery of three-dimensional shape from image focus

    Publication Year: 1995 , Page(s): 266 - 274
    Cited by:  Papers (96)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (796 KB)  

    A new shape-from-focus method is described which is based on a new concept, named focused image surface (FIS). FIS of an object is defined as the surface formed by the set of points at which the object points are focused by a camera lens. According to paraxial-geometric optics, there is a one-to-one correspondence between the shape of an object and the shape of its FIS. Therefore, the problem of s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Parts of visual form: computational aspects

    Publication Year: 1995 , Page(s): 239 - 251
    Cited by:  Papers (78)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1276 KB)  

    Underlying recognition is an organization of objects and their parts into classes and hierarchies. A representation of parts for recognition requires that they be invariant to rigid transformations, robust in the presence of occlusions, stable with changes in viewing geometry, and be arranged in a hierarchy. These constraints are captured in a general framework using notions of a PART-LINE and a P... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

The IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI) is published monthly. Its editorial board strives to present most important research results in areas within TPAMI's scope.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
David A. Forsyth
University of Illinois