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Articles 1 - 30 of 65
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Registration And Energies, Patricia Kinsey
The Utica Club Show, Frank Leto
The Utica Club Show, Frank Leto
Control Of A Four-Color Lithographic Press By Monitoring The Hue Consistency Of The Reproduction With A Densitometer, Chikashi Hashimoto
Control Of A Four-Color Lithographic Press By Monitoring The Hue Consistency Of The Reproduction With A Densitometer, Chikashi Hashimoto
Theses
The purpose of this study was to establish a reliable control method to maintain the visual hue consistency of "critical colors" on a four-color lithographic press. The term "critical colors" indicates those colors which are deemed by the customer or pressman to be important for a particular job and will require special attention to maintain their hue consistency. It was hypothesized that a densitometer, which automatically computes hue error and grayness using the Preucil method, could be used to measure critical colors and maintain their computed hue consistency. In order to analyze the effect of the control method monitoring hue …
Ambrotype Images, Thomas Feldvebel
Studies On The Lith Development Of A Silver Iodobromide Emulsion, Larry Zurbrick
Studies On The Lith Development Of A Silver Iodobromide Emulsion, Larry Zurbrick
Theses
The lithographic development of a silver iodobromide emulsion with thiocyanate substituted for bromide in a lith developer formulation showed differences in behavior with regard to induction time and maximum rate of development at equal levels of normality. An experiment was designed with development time, halide concentration, and exposure level as the variables with maximum rate of development, time to reach 0.20 optical density (induction time), and slope at 0.40 optical density as the response parameters. The maximum rate of development with the developer containing bromide was found to be significantly dependent upon exposure level and not significantly dependent upon bromide …
Electric Field Enhancement Of Efficiency In Autoradiographic Exposures, Harvey Smith
Electric Field Enhancement Of Efficiency In Autoradiographic Exposures, Harvey Smith
Theses
An external electric field was applied during autoradiographic exposures in an attempt to influence the path length and trajectory of image forming beta particles. Various techniques were employed to maximize the electric field applied. No evidence was found for increases in efficiency of image formation within the receiving emulsion, up to a field strength of 7 x 10 volts/cm.
The Effect Of Photographic Reducers In Autoradiographic Intensification Method For Image Recovery Of Incorrectly Exposed Radiographs, Donald Vachon
The Effect Of Photographic Reducers In Autoradiographic Intensification Method For Image Recovery Of Incorrectly Exposed Radiographs, Donald Vachon
Theses
Autoradiographic image intensification methods for recovering the images of underexposed step wedges, resolution targets and radiographs were investigated. The fog level of the intensified image was decreased by treating the film in a subproportional photographic reducer (mixture of potassium ferricyanide and sodium thiosulfate) prior to activation with S-35 thiourea. The fog level of intensified images of a step wedge decreased from a density of 1.32 to .12, the maximum contrast increased from 2.08 to 5.52, the relative speed increase calculated at 0.6 above fog level increased from 3.05 to 4.06 while resolution remained the same at 5.0 lines per millimeter.Radiographs …
Glass, Joseph Kivlin
Eight Hundred Pounds Of Sand, Two Ping Pong Tables And..., Malcolm Spaull
Eight Hundred Pounds Of Sand, Two Ping Pong Tables And..., Malcolm Spaull
Theses
None provided.
Modulation Transfer Function Of Image Motion Due To Operator Vibration, Venkatraman Nagaswami
Modulation Transfer Function Of Image Motion Due To Operator Vibration, Venkatraman Nagaswami
Theses
The displacement path of a hand-held photographic camera is studied at low shutter speeds when operated by different observers. Using the Fourier method, the average power spectrum of hand vibration is obtained. The Modulation Transfer Function of image motion for an average observer at various exposure times is theoretically predicted.
The Role Of Reliability In The Publisher/Supplier Relationship In Textbook Production, Steven Brenner
The Role Of Reliability In The Publisher/Supplier Relationship In Textbook Production, Steven Brenner
Theses
Most publishers in the textbook publishing industry experience production delays. If the delays are serious it could result in a postponed publication date. The ramifications of a postponed publication date range from anxiety to the author and publisher to lost revenues. Most textbook publishers are required to have their new texts reviewed by adoption committies, therefore it is imperative that their books be ready by a certain date. There are many functions involved in the book making process. A delay in any one area may hold things up in other areas, thus compounding the situation. The purpose of this thesis …
Found Television Images, Janice Hope Meyers
The Editorial Decision In Photography, Lyn Adams
A Study Of The Effect Of Coating Variations On Tone Reproduction In The Association Products Plate, Mark Woodhouse
A Study Of The Effect Of Coating Variations On Tone Reproduction In The Association Products Plate, Mark Woodhouse
Theses
The halftone process is so much a part of printing today that it is often hard for printers to conceive of the notion of reproducing an image without a screen. Before the idea of breaking up an image into small dots came along however, printing was being done with lithographic methods which produced excellent results and the main concern of the theorist and technician was how to produce a more consistent, higher-quality, continuous tone image. Perhaps it is unfortunate that the advent of the halftone process distracted thought from this area to such a large degree, since it wasn't until …
Determination Of The Chemical Spread Function Of Kodak High Contrast Copy 5069 Emulsion, J.N.A. Laitre
Determination Of The Chemical Spread Function Of Kodak High Contrast Copy 5069 Emulsion, J.N.A. Laitre
Theses
A new procedure for obtaining the Chemical Spread Function of an emulsion-developer combination is discussed. This procedure consists of directly measuring the Optical Modulation Transfer Function (MTFO) by scanning the sinusoidal object irradiance distribution through the non-developed emulsion using a microdensitometer. The Modulation Transfer Function (MTF) of the processed emulsion is determined in the conventional manner. Then the Chemical Modulation Transfer Function (MTFC) is determined from the linear relationship: MTF = MTFC X MTFO. Once the MTFO is determined then the Spread Function is calculated using the Fourier Transform operator. Photographic systems are in general non-linear. However it is well …
Crown Ether Complexes Of Lanthanide Elements And Their Applications As Lanthanide Shift Reagents, Dale Decann
Crown Ether Complexes Of Lanthanide Elements And Their Applications As Lanthanide Shift Reagents, Dale Decann
Theses
A complex of the lanthanide salt, praseodymium nitrate, and the crown ether, 15-crown-5 has been isolated. The characterization of this complex by elemental analysis, melting point, H and C NMR, UV-visible and IR has indicated that the isolable solid compound is a 1:1 stoichiometric complex of the two reactants and is unsolvated. The application of this complex as a lanthanide shift reagent does not appear to be very feasible due to its insolubility in the non-polar solvents typically used in NMR experiments. Studies of the shifting ability of this complex as well as an inves tigation of the shifting ability …
Design Considerations In Linear Microdensitometry, Thomas Lianza
Design Considerations In Linear Microdensitometry, Thomas Lianza
Theses
The conditions for linearity in microdensitometry are discussed. It is shown that under proper conditions a microdensitometer may behave linearly regardless of the coherence properties of the source. A linear microdensitometer was constructed and design considerations are presented as well as test results.
Image Quality Dependence On Partial Coherence In A Projection Printer, Bruce Radl
Image Quality Dependence On Partial Coherence In A Projection Printer, Bruce Radl
Theses
A study has been made of the printed images from a projection printer whose light source can be varied to provide illumination of various levels of partial coherence. The coherence interval for five light source configurations was measured with a shearing interferometer at the object plane of the printer. Many test images were made with the printer for each of the five degrees of partial coherence and results showing image quality as a function of coherence interval have been reported. It was found that with an 11µm coherence interval the image forming characteristics were typical of an incoherent instrument and …
A Low Frequency Sine Wave Camera, Russell Palum
A Low Frequency Sine Wave Camera, Russell Palum
Theses
An optical system using spherical and cylindrical optics can convert area-modulated spatial sinusoidal targets to intensity-modulated spatial sinusoidal images. A specific system was analyzed with a spot diagram. System response to 30 cycles-mm~l is predicted. The system mechanical tolerances were determined on the basis of modulation transfer function (MTF) calculations. A mechanical structure which would maintain these tolerances was designed and built.
Design And Evaluation Of A Stepped Diaphragm Intensity Scale Graphic Arts Sensitometer, Patrick Meehan
Design And Evaluation Of A Stepped Diaphragm Intensity Scale Graphic Arts Sensitometer, Patrick Meehan
Theses
An Intensity Scale Sensitometer for testing the photographic response of Graphic Arts materials was built and evaluated. The sensitometer utilizes a stepped area diaphragm and a cylindrical lens to produce a stepped illuminance distribution at the film plane. Both tungsten and pulsed xenon lamps are provided. A computer aided study was used to find the optimum lamp position with respect to the reflector. A scanning aperture type shutter located at the stepped diaphragm and a knife edge aperture located at the lens are used to control exposure duration and intensity. The main advantage of this sensitometer is the production of …
The Effects Of Sulfur Sensitization And Stabilization By 4-Hydroxy-6-Methyl-1,3,3a,7-Tetraazaindene On Hydrogen Sensitization Of A Photographic Emulsion, David Lyon
Theses
Hypersensitization using H2 gas is the most recent addition to the techniques available to reduce the effects of low intensity reciprocity law failure. Because of the presence of addenda in all commercially available emulsions, the interactive effects of hydrogen sensitization with a common stabilizer (4-methyl-6-hydroxy-1,3,3a,7-tetraazaindene) and a common form of chemical sensitization (Sulfur Sensitization) alone and together were investigated. A primitive, single jet emulsion was coated with and without the above addenda. Samples were paired and either treated to a hydrogen baking process at 65°C for 20 minutes, or left untreated. Sensitometric exposures were made in a room air environment …
The Modification Of Simple Images By Fourier Transform Manipulation, Noel Chavez
The Modification Of Simple Images By Fourier Transform Manipulation, Noel Chavez
Theses
Knowledge of how an image is changed by a given modification of its Fourier transform is important when attempting to find solutions to problems in image processing. Several types of filters were used to modify the Fourier transforms of an edge and a bartarget. The images were reconstructed from the modified transforms to determine the change produced by a given modification. Various regions of the Fourier transform determine specific characteristics of the image. The amplitude of the low frequencies controls the form and average level of the image, while the amplitude of the high frequencies effects sharp transitions and noise.
The Effects Of Polyethylene Oxide On Dmaac's "B" Type Developer, Harold Mccullough
The Effects Of Polyethylene Oxide On Dmaac's "B" Type Developer, Harold Mccullough
Theses
This report describes the results of a study comparing ASA speed, contrast index, and resolution from a developer time series. The time series was made on six levels each of PEO-400, -600, -1000, and -1500 added to DMAAC's "B" developer. Kodak's SO-277, low contrast, and SO-243, high contrast, aerial duplicating films were used. Results show that PEO-400, at a concentration of 30ml/l, can be a material help in getting higher speeds and contrast index from SO-277 aerial duplicating film without loss of resolution.
Comparison Of Bromide, Benzotriazole, And Phenyl Mercaptotetrazole And Their Effect On Photographic Development, James Kretchmer
Comparison Of Bromide, Benzotriazole, And Phenyl Mercaptotetrazole And Their Effect On Photographic Development, James Kretchmer
Theses
A comparison of three commonly used antifoggants was made. Their effect on the formation of fog and image density development was studied using a rate factor of development. This rate factor is defined as the slope of the curve for density-log development time. Bromide and benzotriazole were found to have no effect on the rate of development whereas 1-phenyl-5-mercaptotetrazole was found to significantly reduce the rate of development. Bromide and benzotriazole were found to cause a suppression of image density only by increasing the time before density formation begins.
Existential Man And The Creative Act, Finkel Lisa
Existential Man And The Creative Act, Lisa Finkel
The Essence Of Reality, Michael Geglia
Minimization Of Unwanted X-Ray Exposures On Conventional Photographic Films By Developer Modification, Michael L. Rudolph
Minimization Of Unwanted X-Ray Exposures On Conventional Photographic Films By Developer Modification, Michael L. Rudolph
Theses
Experiments were done to reduce the influence of unwanted X-ray exposures on Kodak Plus-X film. Variations of surface developer components showed no favorable results. The concentration of KBr was varied up to 10 grams per liter with again, no favorable results. The incorperation of benzitriazole decreased base plus fog from values of .81 to .56 with a significant decrease in speed. Phenyl mercaptotetrazole was extreamly effective in decreasing both base plus fog and speed.
Mtf Analysis Of An Emulsion Used For Color Paper, C. Alan Way
Mtf Analysis Of An Emulsion Used For Color Paper, C. Alan Way
Theses
This thesis studied the relationship between the MTF's of a color emulsion used for photographic paper but coated on clear base. Analysis of the MTF curves show differences that can be attributed to interimage effects. The effects in the red and blue sensitive layers caused a decrease in the overall MTF of the film.