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Articles 8731 - 8760 of 10020
Full-Text Articles in Entire DC Network
The Bausch & Lomb Industrial Design Department Identity Program, Lorrie Frear
The Bausch & Lomb Industrial Design Department Identity Program, Lorrie Frear
Theses
None provided.
The Effect Of Band-Passed Spatial Noise On The Perception Of Grain, Wallace Carpenter
The Effect Of Band-Passed Spatial Noise On The Perception Of Grain, Wallace Carpenter
Theses
A one octave ranged noise target was constructed with the aid of fourier optics and band-pass spatial filtering. Band-limited noise targets of varying degrees of percent modulation were then generated as a means of determining threshold values of noise perception at low spatial frequencies.
Reporter - May 15th 1981, Rit Reporter Staff
Reporter - May 15th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - May 14, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - May 14, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - May 8th 1981, Rit Reporter Staff
Reporter - May 8th 1981, Rit Reporter Staff
University Publications
No abstract provided.
Contemporary Furniture And The Pursuit Of Comfort, Joseph G. Prutch
Contemporary Furniture And The Pursuit Of Comfort, Joseph G. Prutch
Theses
None provided.
The Halftone Effect In Color Photographic Enlargements, Rick Crowsey
The Halftone Effect In Color Photographic Enlargements, Rick Crowsey
Theses
In continuous-tone photography, a 'Halftone Effect" sometimes occurs that alters the tone reproduction in a distinctive way. Highlight contrast is decreased and middletone densities are lowered. Published data show that this effect occurs in black-and-white photography when the grain pattern of the negative is reproduced very sharply in the print . High-magnification enlargements are especially susceptible. Does a corresponding effect occur in color photography? A search of the literature reveals no answer. The research here described is to determine, by direct measurements of densities in sharp and blurred enlargements, the magnitude of the halftone effect in particular color enlargements from …
Depth Of Field In High Magnification Fine Grain Photography, Mark Konieczny
Depth Of Field In High Magnification Fine Grain Photography, Mark Konieczny
Theses
Under normal, general purpose photographic conditions, depth of field is determined by the size of a geometrical blur circle on the negative or print. Under high magnification conditions, another means of measurement must be used based on the wave nature of light and the resolution of the imaging system. For this purpose, an effective depth of field was determined on the basis that no significant deterioration of image quality could be detected by means of resolution and Transfer function in the range of frequencies where the eye transfer function is at its peak. The experimental values obtained were compared with …
Campobello Island: Far From The Mainstream, Stephen O. Muskie
The Effect Of Temperature And Relative Humidity During Drying On The Covering Power Of Processed X-Ray Films, John M. Lauffer
The Effect Of Temperature And Relative Humidity During Drying On The Covering Power Of Processed X-Ray Films, John M. Lauffer
Theses
With the constantly decreasing silver reserves and correspondingly higher costs, film manufacturers are continually searching for methods to reduce the amount of silver that is used. By using closely controlled conditions of temperature and saturated salt solutions to provide control of relative humidity during drying of processed x-ray film, it was found that the covering power may be as low as 70$ of its maximum value depending on the conditions used for drying the film. The highest values for covering power existed when the film was dried at low temperatures and high relative humidities or high temperatures and low relative …
Image Degradation In A Diffusion Transfer Process, Peter Petch
Image Degradation In A Diffusion Transfer Process, Peter Petch
Theses
The Diffusion Transfer Process is now widely used in the Graphic Arts industry, and it is important to determine to what length different factors affect the optimum use of it. The effects of exposure, age of the processing solution, and line frequently on the image quality of the Kodak PMT system were studied. Exposure was varied by exposing the material to a standard illuminance for different amounts of time; the processing solution was aged by bubbling air through it for varied amounts of time; line frequency was varied by using a Kodak sinusoidal target and examining the images of two …
A Digital Image Processing System For Slow Scan Television, James Schueckler
A Digital Image Processing System For Slow Scan Television, James Schueckler
Theses
This paper describes a low cost, but powerful, digital image processing system. Although general purpose, it was designed for experimentation with amateur radio slow scan television (SSTV). The project involved conceptualizing, designing, building, programming, and operating the complete integrated system. The image format is the SSTV standard: 128 picture elements (pixels) per line, 128 lines, 4 bits per pixel. The IEEE Standard 696 (S-100) microcomputer bus was used for system interconnect to provide flexibility and expandability. Several microcomputer boards were purchased, and two image interface boards were designed and built by the author. One image interface board provides for transmitting …
Edge Sharpness Effects On Computer-Generated Holograms, Clinton S. Potter
Edge Sharpness Effects On Computer-Generated Holograms, Clinton S. Potter
Theses
Computer-generated holograms refer to a class of holograms which are produced as a graphical output from a computer. This paper investigates the relation. ship between the resolution in the system used to re duce the graphical artwork to a reasonable size for diffracting light and the quality of the reconstructed hologram. A number of reduction schemes are examined including a one-step reduction onto a general purpose film, a one-step reduction onto a high resolution film and a two-step reduction scheme using coherent illumination during the second reduction.
The Evaluation Of Positive Photoresist Speed, Donis Flagello
The Evaluation Of Positive Photoresist Speed, Donis Flagello
Theses
The feasibility of photographic speed values for positive photoresist is evaluated. Speed is defined as the reciprocal of exposure necessary to produce a desired response. An outline of the microlithographic process, the chemistry of positive resist, and previous exposure models precede the experimental body of work to facilitate understanding of the photoresist system. The experimental method proposes a mathematical model describing the resist response to exposure. Photographic speed values result from this model. They are tested for sensitivity to process changes using Analysis of Variance. One speed definition is chosen as a possible standard and process control. It is based …
An Investigation Of The Vapor Cushion Thickness, Temperature, And Vaporization Time Of Leidenfrost Drops, Frank Bonsignore
An Investigation Of The Vapor Cushion Thickness, Temperature, And Vaporization Time Of Leidenfrost Drops, Frank Bonsignore
Theses
The subject of this investigation was the film boiling of liquid drops on a hot horizontal surface (the Leidenfrost Phenomenon) . Using Gottfried and Bell's model of a Leidenfrost drop, the thickness of the vapor cushion beneath film boiling water drops, 6, was calculated over a range of test plate and drop temperatures. The results indicated that the vapor cushion thickness varied very slowly with test plate temperature and maintained a finite value at test plate temperatures where the Leidenfrost Phenomenon cannot be initiated. To experimentally verify this fact, a heat exchanger was fabricated to cool the hot test plate …
Reporter - April 24th 1981, Rit Reporter Staff
Reporter - April 24th 1981, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - April 17th 1981, Rit Reporter Staff
Reporter - April 17th 1981, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - April 10th 1981, Rit Reporter Staff
Reporter - April 10th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 9, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 9, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 3rd 1981, Rit Reporter Staff
Reporter - April 3rd 1981, Rit Reporter Staff
University Publications
No abstract provided.
Distorter - April 1st 1981, Rit Reporter Staff
Distorter - April 1st 1981, Rit Reporter Staff
University Publications
No abstract provided.
Predicting Color Print Filtration And Exposure, James A. Klingshirn
Predicting Color Print Filtration And Exposure, James A. Klingshirn
Theses
A method of mathematically modeling the response of a system in which color reflection prints are made from a negative was investigated. Data was generated by making a series of prints with different yellow and magenta filtrations at a series of exposures. First, second and third order regression curves were fit to the filtration versus reflection density curves and the exposure versus density curves that were thus generated. The predictions of the sets of equations were compared to the data and it was found that the filtration could be predicted more accurately than the exposure time, because, the response curves …
Stamping And Embossing: A Modern Adaptation Of Pre-Columbian Metalworking Processes, Richard Coble
Stamping And Embossing: A Modern Adaptation Of Pre-Columbian Metalworking Processes, Richard Coble
Theses
Not Included
The Graphic Design Career Kit, Sharon M. Heyenck
Reporter - March 27th 1981, Rit Reporter Staff
Reporter - March 27th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - March 26, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - March 26, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - March 20th 1981, Rit Reporter Staff
Reporter - March 20th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - March 12, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - March 12, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Ntid Focus Spring 1981, Ntid Marketing And Communications
Ntid Focus Spring 1981, Ntid Marketing And Communications
National Technical Institute for the Deaf Papers
Anatomy of a Learning Environment||Cross Registration: Mainstreaming at its Best||Curriculum Councils||High Tech Media Support for Teaching||Learning Centers: Supporting Classroom Instruction||Matt Starr Shines in Graduate Program||Students with Savvy||Teaching the Art of Learning||Teaching the Teachers: The Internship Program||The RIT Experience for Deaf Students||The Total Student||What the Teachers Say
The Effect Of Camera Motion On Mtf And Sqf For Handheld Camera At Two Weights, John Griffith
The Effect Of Camera Motion On Mtf And Sqf For Handheld Camera At Two Weights, John Griffith
Theses
Two hundred seven measurements of camera motion, made while operators took photographs, were used to calculate the average Modulation Transfer Function (MTF) and Subjective Quality Factor (SQF) due to the motion. Eight experiments were performed with a 35mm camera at weights of 300 and 600 grams. The camera displacement path was sampled at intervals ranging from 0.5 milliseconds to 15.6 milliseconds. The MTF and SQF were calculated, at several shutter times, from the measured displacement paths using the model of a perfectly efficient shutter. SQF was a linear function of shutter time. The MTF due to camera motion and shutter …