Now showing items 1-20 of 236

    • Focused Acoustic Wave (Faw) Channelizer 

      Pape, Dennis R.; Bardos, Andrew M.; Popek, Marc H.; Shah, Manhar L. (1986-09-24)
      The architecture, operation, and performance of a new integrated acoustic RF channelizer are described. The all- acoustic device uses a phased array piezoelectric transducer to generate frequency dispersed bulk acoustic ...
    • Digital optical iterative pattern recognizer 

      Kozaitis, S.P.; Kischuk, C. S. (1988-05-03)
      An optical pattern recognizer which classifies an input sequence into one of two classes is described. The language of regular expressions is used to identify a set of input sequences to be recognized. The system is realized ...
    • Generation of moire contours with acousto-optic cells 

      Blatt, Joel H.; Chang Ho, Huey- Chin; Young, Eddie H. (1988-08-22)
      Moire contours are seen on a curved surface viewed through a grating when the surface is illuminated with a matched grating. We have been able to replace both the projection and viewing physical gratings with gratings of ...
    • Fiber-optic sensor and smart structures research at Florida Institute of Technology 

      Grossman, Barry; Alavie, Tino; Ham, Fred; Franke, Jorge; Thursby, Michael (1990-02-05)
      This paper discusses the fundamental issues being investigated by Florida Institute of Technology (F.I.T.) to implement the technology of smart structural systems for DoD, NASA, and commercial applications. Embedded sensors ...
    • Image preprocessing for phase-only filtering 

      Kozaitis, S.P.; Roeksabutr, Atikom (1990-02-05)
      We compare the performance of an optical binary phase-only correlator using several nonlinear filters for preprocessing. An image of an airfield with different but similar appearing planes is used as the input data. The ...
    • Processing of one-fiber interferometric fiber-optic sensor signals 

      Tino, Alavie, A.; Grossman, Barry G.; Thursby, Michael H. (1990-02-13)
      Recent research conducted in the Fiber -Optic Sensor Systems Laboratory at Florida Institute of Technology in fiber -optic strain sensors for use in smart structures has concentrated primarily on one -fiber interferometers. ...
    • Optical processors for smart structures 

      Grossman, Barry G.; Hou, Howard; Nassar, Ramzi (1990-09-01)
      For underwater fiber-optic sensor arrays containing hundreds of sensors as well as smart aerospace structures and skins using fiber-optic strain sensor arrays, the output of the sensors are optical signals that are a ...
    • Experimental performance of a binary phase-only optical correlator using visual and infrared imagery 

      Kozaitis, S.P.; Halby, Sandra L.; Foor, Wesley E. (1990-09-01)
      Experimental results of an optical binary phase-only correlator using both visual and IR imagery are presented. The inputs to the correlator originate from actual aerial imagery containing aircraft and a variety of ...
    • Composite damage assessment employing an optical neural network processor and an embedded fiber-optic sensor array 

      Grossman, Barry G.; Gao, Xing; Thursby, Michael H. (1991-12-01)
      This paper discusses a novel approach for composite damage assessment with potential for DoD, NASA, and commercial applications. We have analyzed and modeled a two dimensional composite damage assessment system for real-time ...
    • Neural control of smart electromagnetic structures 

      Thursby, Michael H.; Yoo, Kisuck; Grossman, Barry G. (1991-12-01)
      Artificial neural networks (ANNs) and their ability to model and control dynamical systems for smart structures, including sensors, actuators, and plants, are directly applicable to the smart electromagnetic structures ...
    • Detection, location, and quantification of structural damage by neural-net-processed moire profilometry 

      Grossman, Barry G.; Gonzalez, Frank S.; Blatt, Joel H.; Hooker, Jeffery A. (1992-03-01)
      The development of efficient high speed techniques to recognize, locate, and quantify damage is vitally important for successful automated inspection systems such as ones used for the inspection of undersea pipelines. Two ...
    • Feature-based correlation filters for distortion invariance 

      Kozaitis, S.P.; Petrilak, Robert; Foor, Wesley E. (1992-07-01)
      In an optical correlator, binary phase-only filters (BPOFs) that recognize objects that vary in a nonrepeatable way are essential for recognizing objects from actual sensors. An approach is required that is as descriptive ...
    • Multiresolution template matching using an optical correlator 

      Kozaitis, S.P.; Saquib, Zia; Cofer, Rufus H.; Foor, Wesley E. (1992-07-01)
      Infrared imagery of 512 × 512 pixels was processed with 128 × 128 arrays by computer simulation of an optical correlator using various correlation filters. Pyramidal processing using binary phase-only filters (BPOFs), ...
    • Optical estimation of fractal dimension for image assessment 

      Kozaitis, S.P.; Cofer, Rufus H. (1992-07-01)
      We modeled an optical system for estimation of the fractal dimension to provide a measure of surface roughness for an entire image and for image segmentation. Although the simulated optical result was similar to that ...
    • Practical constraints pertinent to the design of neural networks 

      Abdallah, Said Sadek; Cofer, Rufus H. (1992-08-20)
      in designing a feedforward neural network for numerical computation using the backpropagation algorithm it is essential to know that the resulting network has a practical global minimum, meaning that convergence to a ...
    • Explanation mode for Bayesian automatic object recognition 

      Hazlett, Thomas L.; Cofer, Rufus H.; Brown, Harold K. (1992-09-16)
      One of the more useful techniques to emerge from AI is the provision of an explanation modality used by the researcher to understand and subsequently tune the reasoning of an expert system. Such a capability, missing in ...
    • Supercomputer-based spherical scene projector 

      Brown, Harold K.; Madry, John G.; Cofer, Rufus H.; Kozaitis, S.P. (1992-09-21)
      A multi-technology high performance computing system based on the Open Parallel Architecture Design Specification (OPADS) platform is being evaluated for use as a graphics engine for spherical scene projection. This system ...
    • Bayesian defeat of camouflage 

      Cofer, Rufus H. (1992-09-21)
      A new technique is shown for refining and reducing incoming camouflage data based upon the Bayesian paradigm. Innovation is displayed in use of a statistical conditioning sequence that avoids the need to form target features ...
    • Ground exploitation using a binary phase-only optical correlator 

      Kozaitis, S.P.; Halby, Sandra L.; Foor, Wesley E. (1992-12-27)
      Experimental results of an optical binary phase-only correlator using aerial imagery for ground exploitation is presented. The correlator uses magnetooptic spatial light modulators (SLMs) for dynamic operation. Input images ...
    • Feature-based correlation filters for object recognition 

      Kozaitis, S.P.; Foor, Wesley E. (1993-02-26)
      Using an optical correlator, we experimentally evaluated a binary phase-only filter (BPOF) designed to recognize objects not in the training set used to design the filter. Such a filter is essential for recognizing objects ...