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Volume 36 (1973)
- Issue 6 Pages 339-
- Issue 5 Pages 271-
- Issue 4 Pages 219-
- Issue 3 Pages 153-
- Issue 2 Pages 73-
- Issue 1 Pages 5-
Volume 36, Issue 2
Displaying 1-7 of 7 articles from this issue
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Toshio TANAKA1973 Volume 36 Issue 2 Pages 73-80
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
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Tadaaki TANI1973 Volume 36 Issue 2 Pages 81-85
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIonization potentials of o-, m- and p-phenylendiamines, and N, N-dimethyl-p-phenylenediamine on the surface of silver bromide grains in dried and swollen photographic emulsions and in developers have been estimated on the basis of their ionization potentials in vapor phase and of the quantitative estimation of the polarization energies of their surroundings during their ionization process. It has been suggested to be energetically posible from the calculated results for p-phenylenediamines to transfer electrons into latent images, in good accord with experimental results. It has also been suggested that a developing agent with small ionization potential causes the fast development due to its vertical ionization, and a developing agent with relatively large ionization potential causes the slow development due to its adiabatic ionization.View full abstractDownload PDF (586K) -
Boundary-line ExtractionYoichi MIYAKE1973 Volume 36 Issue 2 Pages 86-94
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe boundary-line extraction of binary patterns and aerial photographs by a computer are studied and also discussed the extraction of the line with a certain direction.
Usually, boundary definition is a sharp jump of the scene density, therefore, such a jump can be detected by differential operations such as the Laplacian (ð2f (x, y)/ðx2+ð2f (x, y)/ðy2).
If f (x, y) transforms F (wx, wy), then the Laplacian transforms to-(w2x+w2y).F (wx, wy), so that one can accomplish the differential operation by the use of (w2x+w2y) filter in the Fourier domain.
On the other hand, if a pattern has straight lines with various directions, the frequency spectrum arrises perpendicular to the coressponding original ones. Therefore, one can extract the line coressponding to certain specific direction by a dirctional filter.
Cooley's FFT (Fast Fourier Transform) algorithm is extended to two dimensions and applied to these problems.
The computer simulation with a directional filter and a differential filter are effective as to binary patterns, however concering aerial photographs, the results are not so well as the case of binary patterns, but the road patterns in the picture can be detected.View full abstractDownload PDF (17953K) -
1973 Volume 36 Issue 2 Pages 94
Published: 1973
Released on J-STAGE: August 11, 2011
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Lithdevelopment Effect on Multicoated EmulsionsEiichi OKUTSU, Takeo SAKAI, Haruhiko IWANO1973 Volume 36 Issue 2 Pages 95-100
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe lithdevelopment effects are studied by using multicoated emulsions. In higher exposure level, quinone, the oxidation product of development, contributes to the acceleration effect. On the other hand in lower exposure level neither the acceleration effect by quinone nor its latent image bleach is observed. It is suggested that the pH depression by development contributes to the retardation effect. The acceleration effect by quinon works only in near vicinity of the development site while the retardation effect by the pH depression reaches to relatively longer distance. The bromide ions liberated by development show little development effect.View full abstractDownload PDF (618K) -
The Influence of Developing Agents on the Rate of FixationNobuo Mii, Akira SASAI1973 Volume 36 Issue 2 Pages 101-106
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSEffect of developing agents on the rate of fixation in monobaths were investigated.
Experiments performed with simple monobaths containing different developing agents in the pH range 5-13, using a high-speed negative film and a motion-picture positive film, indicated that most developing agents prolonged the film-clearing time at relatively lower pH level (below 11) but didn't affect it at higher pH level (above 11). These effect of developing agents were also observed on the curves showing the relationship between processing time in monobaths and the amount of residual silver salt in film after completed washing.
In view of the experimental results, it can be presumed that the decrease of the rate of fixation which depends on the developing agents in monobaths of relatively lower pH level is caused by adsorption of noncharged molecules of developing agents to gelatin or to the surface of the silver halide grains.View full abstractDownload PDF (772K) -
Taichi OSHIMA1973 Volume 36 Issue 2 Pages 107-136
Published: March 31, 1973
Released on J-STAGE: August 11, 2011
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