Computer Science and Artificial Intelligence Lab (CSAIL): Recent submissions

Now showing items 1601-1620 of 2625

  • How do Humans Determine Reflectance Properties under Unknown Illumination? 

    Unknown author (2001-10-21)
    Under normal viewing conditions, humans find it easy to distinguish between objects made out of different materials such as plastic, metal, or paper. Untextured materials such as these have different surface reflectance ...

  • Type-omega DPLs 

    Unknown author (2001-10-16)
    Type-omega DPLs (Denotational Proof Languages) are languages for proof presentation and search that offer strong soundness guarantees. LCF-type systems such as HOL offer similar guarantees, but their soundness relies heavily ...

  • Type-alpha DPLs 

    Unknown author (2001-10-05)
    This paper introduces Denotational Proof Languages (DPLs). DPLs are languages for presenting, discovering, and checking formal proofs. In particular, in this paper we discus type-alpha DPLs---a simple class of DPLs for ...

  • Explanation of Big "P" as of March 20, 1959 

    Unknown author (1959-03-01)
    ERROR is a routine to provide a common location for all routines. Its celling sequence is: SXD SERROR,4 TSX SERROR+1,4 The above is normally followed immediately by up to 20 registers of BCD remarks terminated by a word ...

  • Learning Object-Independent Modes of Variation with Feature Flow Fields 

    Unknown author (2001-09-01)
    We present a unifying framework in which "object-independent" modes of variation are learned from continuous-time data such as video sequences. These modes of variation can be used as "generators" to produce a manifold of ...

  • Range Segmentation Using Visibility Constraints 

    Unknown author (2001-09-01)
    Visibility constraints can aid the segmentation of foreground objects observed with multiple range images. In our approach, points are defined as foreground if they can be determined to occlude some {em empty space} in the ...

  • Gait Dynamics for Recognition and Classification 

    Unknown author (2001-09-01)
    This paper describes a representation of the dynamics of human walking action for the purpose of person identification and classification by gait appearance. Our gait representation is based on simple features such as ...

  • Surface Reflectance Estimation and Natural Illumination Statistics 

    Unknown author (2001-09-01)
    Humans recognize optical reflectance properties of surfaces such as metal, plastic, or paper from a single image without knowledge of illumination. We develop a machine vision system to perform similar recognition tasks ...

  • The Synthesis of Stable Grasps in the Plane 

    Unknown author (1985-10-01)
    This paper addresses the problem of synthesizing stable grasps on arbitrary planar polygons. Each finger is a virtual spring whose stiffnes and compression can be programmed. The contacts between the finger tips and the ...

  • A Computational Model for the Acquisition and Use of Phonological Knowledge 

    Unknown author (1996-03-01)
    Does knowledge of language consist of symbolic rules? How do children learn and use their linguistic knowledge? To elucidate these questions, we present a computational model that acquires phonological knowledge from a ...

  • Computing Upper and Lower Bounds on Likelihoods in Intractable Networks 

    Unknown author (1996-03-01)
    We present techniques for computing upper and lower bounds on the likelihoods of partial instantiations of variables in sigmoid and noisy-OR networks. The bounds determine confidence intervals for the desired likelihoods ...

  • Mean Field Theory for Sigmoid Belief Networks 

    Unknown author (1996-08-01)
    We develop a mean field theory for sigmoid belief networks based on ideas from statistical mechanics. Our mean field theory provides a tractable approximation to the true probability distribution in these networks; it ...

  • Learning Fine Motion by Markov Mixtures of Experts 

    Unknown author (1995-11-01)
    Compliant control is a standard method for performing fine manipulation tasks, like grasping and assembly, but it requires estimation of the state of contact between the robot arm and the objects involved. Here we present ...

  • The Three-Dimensional Interpretation of a Class of Simple Line-Drawings 

    Unknown author (1995-10-01)
    We provide a theory of the three-dimensional interpretation of a class of line-drawings called p-images, which are interpreted by the human vision system as parallelepipeds ("boxes"). Despite their simplicity, p-images ...

  • The Role of Attention in Binocular Rivalry as Revealed Through Optokinetic Nystagmus 

    Unknown author (1995-11-01)
    When stimuli presented to the two eyes differ considerably, stable binocular fusion fails, and the subjective percept alternates between the two monocular images, a phenomenon known as binocular rivalry. The influence of ...

  • On the Physiology of Bistable Percepts 

    Unknown author (1995-11-01)
    Binocular rivalry refers to the alternating perceptions experienced when two dissimilar patterns are stereoscopically viewed. To study the neural mechanism that underlies such competitive interactions, single cells were ...

  • Minimizing Statistical Bias with Queries 

    Unknown author (1995-09-01)
    I describe an exploration criterion that attempts to minimize the error of a learner by minimizing its estimated squared bias. I describe experiments with locally-weighted regression on two simple kinematics problems, ...

  • A Network Charge-Orineted MOS Transistor Model 

    Unknown author (1995-08-01)
    The MOS transistor physical model as described in [3] is presented here as a network model. The goal is to obtain an accurate model, suitable for simulation, free from certain problems reported in the literature [13], and ...

  • Extracting Salient Curves from Images: An Analysis of the Saliency Network 

    Unknown author (1995-08-01)
    The Saliency Network proposed by Shashua and Ullman is a well-known approach to the problem of extracting salient curves from images while performing gap completion. This paper analyzes the Saliency Network. The ...

  • Template Matching: Matched Spatial Filters and Beyond 

    Unknown author (1995-10-01)
    Template matching by means of cross-correlation is common practice in pattern recognition. However, its sensitivity to deformations of the pattern and the broad and unsharp peaks it produces are significant drawbacks. This ...