All issues
Predecessor
Volume 31, Issue 2
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1992 Volume 31 Issue 2 Pages 1
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (1862K) -
[in Japanese]1992 Volume 31 Issue 2 Pages 2-3
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (4832K) -
Mikio SUGITA, Ryoji OHBA1992 Volume 31 Issue 2 Pages 4-10
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (3966K) -
Shoji TAKEUCHI1992 Volume 31 Issue 2 Pages 11-22
Published: April 30, 1992
Released on J-STAGE: December 08, 2010
JOURNAL FREE ACCESSFor the purpose of improvement of the stability of classification results of multi-temporal images using supervised maximum likelihood classification method, the author proposed a classification method combining the method by unifying training data sets of two temporal images with the method using multi-layer classification images. By the experiment using LANDSAT/MSS image and MOS-1/MESSR image taken almost at the same time, the occupation rate of classification classes was proved to become stable by normalization of two temporal images and unification of both training data sets, although the pixel-wise class coincidence rate was very poor. The classification method using dual multi-layer classification images was proved to achieve very high pixel-wise coincidence rate and also make class occupation rate more stable. The experiment using two or three multi-temporal images proved that the proposed methods can be used effectively in order to obtain stable classification patterns and class occupation rates among the temporal images, which brings a reasonable result for landcover change extraction.View full abstractDownload PDF (11599K) -
Shintaro GOTO, Shunji MURAI, Yoshiaki HONDA, Kengo ASAKURA1992 Volume 31 Issue 2 Pages 23-28
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSWorld population has doubled in the past 40 years and is now 5 billion. It is estimated to double again in the next 50 years, reaching 10 billion. On the other hand, the annual extension rate of arable land is below 1 %, a rate of growth much lower than that of the population growth. And the yield of cereals had been growing steadily from 1970 to 1985. Since the areas harvested have been constant for this period, the increase in the yield must le attributed to growing productivity. The growth rate of world population is lower than that of world GDP. Consequently, the impact on the global environment by human economic activities is much stronger than the population increase.
This study deals with the role of satellite remote sensing for monitoring the global environment on a global scale, and the analysis of world vegetation, potential arable land area and potential food production. Based on the above results, the total population the earth can feed will be calculated. And we try to consider the relation between global environment and population.View full abstractDownload PDF (1436K) -
Hua QI, Kazuhiko OHNUMA, Yoshizumi YASUDA1992 Volume 31 Issue 2 Pages 29-38
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThe accurate method to eliminate the large component due to the atmospheric scatting is required to measure ocean colors quantitatively in the application of the remote sensing. The present atmospheric correction techniques proposed by Gordon et al. uses the “clear water concept” to determine the aerosol parameters. However the aerosol parameters of the blue band can not be determined directly from the clear water area but be calculated from the aerosol parameters of the other bands using the angstrom power law. Furthermore, this method can not be applied to the images without clear water area.
In this paper, a statistical method is proposed to overcome these problems. The method is based on the idea that the aerosol scattering pattern has no correlation with the ocean color pattern on the entire image or a part of image and this method determines automatically the aerosol characteristics over concerned area.
The method is applied to a sequence of CZCS imagery around Japan islands and the results are compared with those which are given by the “clear water” method. The wavelength dependency of aerosol parameters is also discussed. As the result, the statistical method can give proper aerosol parameters than the “clear water” method. Using the angstrom power low is not appropriate to determine aerosol characteristics around Japan islands.View full abstractDownload PDF (7039K) -
Nobuhiko MORI, Hidetoshi TAKAOKA, Shoichi MASUDA, Shunji MURAI1992 Volume 31 Issue 2 Pages 39-51
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThis research has been carried out to develop a method for effective using of the images of ERS-1, which has been launched in February 1992 in Japan. An experiment of lineament extraction from four pairs of stereoscopic images with different B/H ratio (0.1, 0.3, 0.5 and 1.0) has been executed at two kinds of areas-steep slope area and gentle slope area. The results of this experiment show that the most suitable B/H ratio for lineament extraction is different according to the steepness of the slope of test areas. 0.5 is the best B/H ratio at steep slope area (Izu peninsula), while 1.0 is the best at gentle slope area (Hishikari district) . Based on the results of this experiment, a new image analysis method has been developed. In this method, images are at first changed into stereoscopic images with the most suitable B/H ratio at the area, and then overlaid and displayed on a 3D display. Many useful informations can be extracted from these overlaid stereoscopic images.View full abstractDownload PDF (12445K) -
[in Japanese]1992 Volume 31 Issue 2 Pages 52-54
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (4620K) -
[in Japanese]1992 Volume 31 Issue 2 Pages 55-62
Published: April 30, 1992
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (5040K)
- |<
- <
- 1
- >
- >|