Digital Commons Network^™

Error Free Coding, J. R. Duan, P. A. Wintz

LARS Technical Reports

An adaptive transform coding technique followed by a DPCM technique is employed to code multispectral data. A method of instantaneous expansion of quantization levels by reserving two codewords in the codebook to perform a folding over in quantization is implemented for data with incomplete knowledge of probability density function. Controlled redundancy is inserted periodically as fixed length codewords into the bit string of data packed with variable length codes to facilitate fact retrieval and to detect errors. Preliminary results of several sets of data from the ERTS-1 data frame and the ERIM aircraft data frame showed that an error free …

A Linear Shift-Invariant Image Preprocessing Technique For Multispectral Scanner Systems, C. D. Mcgillem, T. E. Riemer

LARS Technical Reports

A linear shift-invariant image preprocessing technique is examined which requires no specific knowledge of any parameter of the original image and which is sufficiently general to allow the effective radius of the composite imaging system to be arbitrarily shaped and reduced, subject primarily to the noise power constraint. In addition, the size of the point-spread function of the preprocessing filter can be arbitrarily controlled, thus minimizing truncation errors.

Pattern Analysis And Recognition Techniques Applied To The Identification Of Ecological Anomalies, Randolph J. Hoffmann, James D. Turinetti

LARS Symposia

The purpose of this paper is to introduce the remote sensing community 20 an interactive analysis system which was designed and implemented at the Rome Air Development Center (RADC), and to report on some preliminary investigations utilizing the capabilities of the system to provide meaningful features far automated classification of multispectral inputs.

Machine Processing For Remotely Acquired Data, D. A. Landgrebe

LARS Technical Reports

This paper is a general discussion of earth resources information systems which utilize airborne and spaceborne sensors. It points out that information may be derived by sensing and analyzing the spectral, spatial and temporal variations of electromagnetic fields emanating from the earth surface. After giving an overview system organization, the two broad categories of system types are discussed. These are systems in which high quality imagery is essential and those more numerically oriented. Sensors are also discussed with this categorization of systems in mind.

The multispectral approach and pattern recognition are described as an example data analysis procedure for numerically-oriented …

Geometric Aspects In Digital Analysis Of Multi-Spectral Scanner (Mss) Data, Edward M. Mikhail, James R. Baker

LARS Technical Reports

Present automated systems of interpretation which apply pattern recognition techniques on MSS data do not fully consider the geometry of the acquisition system. Metric information cannot therefore be extracted from the data at the same time that interpretation is performed. In an effort to improve the usefulness of the MSS data when digitally treated, geometric aspects are analyzed and discussed. Attempts to correct for scanner instabilities in position and orientation by affine and polynomial transformations, as well as by modified collinearity equations are described. Methods of accounting for panoramic and relief effects are also discussed. It is anticipated that reliable …

Weighting Function Techniques For Storage And Analysis Of Mass Remote Sensing Data, James R. Jancaitis, John L. Junkins

LARS Symposia

Recent publications have documented the development and successful application of weighting function techniques for analytically modeling discretely measurable two-dimensional irregular surfaces. The weighting function techniques produce an analytic functional model valid over the entire input data set. The globally valid function is comprised of an arbitrarily large family of locally valid functions which join together with m-th order continuity assured. The locally valid functions are typically low order polynomials, so that analysis of the functional model is efficient and inexpensive. The theory of the weighting function techniques has been extended to N-dimensional functions, allowing mathematical modeling of discretely measurable functions …

Reflectance Model Of A Plant Leaf, R. Kumar, L. Silva

LARS Technical Reports

A light ray, incident at about 5° to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf wing Fresnel's Equations and Snell's Law. The optical mediums of the leaf considered for ray tracing are: air, cell sap, chloroplast and cell wall. The above ray is also drawn through the same leaf cross section considering cell wall and air as the only optical mediums. The values of the reflection and transmission found from ray tracing agree closely with the experimental results obtained using a Beckman DK-2A Spectroreflectometer. Similarly a light ray, incident at about …

A Planning And Cost Allocation Procedure For Computer System Management, J. Nunamaker, A. Whinston

Department of Computer Science Technical Reports

No abstract provided.

Back Cover, Purdue Road School

Purdue Road School

No abstract provided.

Statistics Interpreted, R D. Pavlovich

Purdue Road School

No abstract provided.

A Methodology For The Design And Optimization Of Information Processing Systems, J. F. Nunamaker

Department of Computer Science Technical Reports

No abstract provided.

A Note On Orders Of Enumeration, John Helm, Albert Meyer, Paul Young

Department of Computer Science Technical Reports

No abstract provided.

Consequences Of Certain Data Errors In The Transportation Planning Process., Ralph Wildy Zimmer

JTRP Technical Reports

No abstract provided.

Optimization Of A Traffic Signal System Through Computer Simulation, Gary William Davies

JTRP Technical Reports

No abstract provided.

Effect Of Acceleration On Material Properties : Interim Report, Hari D. Sharma

JTRP Technical Reports

No abstract provided.

Procedure Manual For Determining Traffic Patterns For A Simplified Planning Procedure For Major Thoroughfare Planning In Small Urban Areas : Interim Report, Andrew Delaney Jones, William Louise Grecco

JTRP Technical Reports

No abstract provided.

A Disaggregate Analysis Of Urban Travel Behavior, Edward J. Kannel

JTRP Technical Reports

No abstract provided.

The Application Of Energy Concepts To Pavements : Informational Report, William H. Highter

JTRP Technical Reports

No abstract provided.

Predicting Park 'N Ride Parking Demand : Technical Paper, Usamah Rashrash Abdus-Samad, William Louise Grecco

JTRP Technical Reports

No abstract provided.

Mechanism For Compaction And Response Of Kaolinite : Final Report, Ralph Jerome Hodek

JTRP Technical Reports

No abstract provided.

A Simplified Procedure For Major Thoroughfare Planning In Small Urban Areas : Interim Report, Andrew Delaney Jones

JTRP Technical Reports

No abstract provided.

An Investigation Into The Gradation Variability Of Aggregates Used In Bases, James T. Parson

JTRP Technical Reports

No abstract provided.

Multispectral Data Compression Through Transform Coding And Block Quantization, P. J. Ready, P. A. Wintz

LARS Technical Reports

Transform coding and block quantization techniques are applied to multispectral data for data compression purposes. Two types of multispectral data are considered, (1) aircraft scanner data, and (2) digitized satellite imagery. The multispectral source is defined and an appropriate mathematical model proposed.

Two error criteria are used to evaluate the performance of the transform encoder. The first is the mean square error between the original and reconstructed data sets. The second is the performance of a computer implemented classification algorithm over the reconstructed data set. The total mean square error for the multispectral vector source is shown to be the …

Light Ray Tracing Through A Leaf Cross Section, R. Kumar, L. Silva

LARS Technical Reports

A light ray, incident at about 5° to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf wing Fresnel's Equations and Snell's Law. The optical mediums of the leaf considered for ray tracing are: air, cell sap, chloroplast and cell wall. The above ray is also drawn through the same leaf cross section considering cell wall and air as the only optical mediums. The values of the reflection and transmission found from ray tracing agree closely with the experimental results obtained using a Beckman DK-2A Spectroreflectometer.

Valve Stress Measurements And Interpretation, J. Adams, J. F. Hamilton

International Compressor Engineering Conference

No abstract provided.

Calculation Of The Thermodynamic Properties Of Refrigerants 12, 22, And 502 Using A Digital Computer, G. T. Kartsounes

International Compressor Engineering Conference

No abstract provided.

Analysis Of Mechanical Friction In Rotary Vane Machines, T. C. Edwards, A. T. Mcdonald

International Compressor Engineering Conference

No abstract provided.

A Mathematical Approach To The Forced Vibrations Of The Suspended Compressor Block, P. Madsen

International Compressor Engineering Conference

No abstract provided.

Vapour Evolution Rates From Oil-Refrigerant Mixtures Following Expansion Through A Nozzle, J. Young, T. Fannin

International Compressor Engineering Conference

No abstract provided.

An Analytical Method For Determining Effective Flow And Force Areas For Refrigeration Compressor Valving Systems, D. D. Schwerzler, J. F. Hamilton

International Compressor Engineering Conference

No abstract provided.