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Volume 18 (1979)
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Volume 18, Issue 1
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[in Japanese]1979 Volume 18 Issue 1 Pages 1
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (1862K) -
1979 Volume 18 Issue 1 Pages 2-3
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
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Munesato YAMADA, Katsuji KUMAKI1979 Volume 18 Issue 1 Pages 4-11
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSA method of video-recording is described with an intention to visualize the micro-dissection stereoscopically. This is made by twin TV-cameras of extremely light weight, which are mounted on the stereomicroscope by use of tine-adapters at both ends of beam-splitter. The images are montaged on one monitor screen by the wipe mode of effect amplifier in such a way that the right image appears in the left half and the left one in the right of the screen. To do this, however, cameras have to be shifted to either side to such an extent that the centre of each image is away from that of the screen by one quarter the total width. Now the stereoscopical image can be recorded on one videotape, instead of two, and important still, without any synchronization trouble which is otherwise a nuisance. Since the screen has to be observed by crossed or converged eyesight, preferably by a number of observers at a time, special prism glasses have been developed and some feasible tips for observation suggested. The authors also discuss the purposes and effects of this method and possible improvements in the instrument design.View full abstractDownload PDF (8528K) -
Kazuya MIYAMA, Shigeru TAKAHATA, Michikazu FUKUHARA1979 Volume 18 Issue 1 Pages 12-22
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSMt. Usu erupted from 7-14 in Aug. 1977. The volcanic ash accumulated several millimeters to 30 centimeters on the agricultural fields around Mt. Usu.
This study is composed a part of application of remoto sensing technique on the agricultural problem. Using aircraft MSS data, we carried out a digital analysis of the agricultural damage and the distribution of ash fall area. Crop identification on the damaged fields was successful with the supervised most likelihood classification method. The average correct performance by training class was 59.3% in the test fields. The results of large area observation test was successful to classify the degree of damaged fields and forests. In this test, it was effective to use the supervised most likelihood classification method and the total classification performance was estimated as 70.3% in the test fields. Consequently, it is obvious that the sufficient survey of agricultural damage resulting from ash fall is possible with the supervised classification. For this purpose, we must select suitable training fields by the ground truth data. Besides we could make the distribution map of ash fall by the processing of “CH.10-CH.7”.
As mentioned above, a digital analysis of the aircraft MSS data is effective for the surveying of field damage and the estimation of eruptive influence.View full abstractDownload PDF (9682K) -
[in Japanese]1979 Volume 18 Issue 1 Pages 23-26
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
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[in Japanese]1979 Volume 18 Issue 1 Pages 27-28
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
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1979 Volume 18 Issue 1 Pages 29-31
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
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1979 Volume 18 Issue 1 Pages 49-53
Published: June 30, 1979
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (364K)
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