All issues
Volume 15 (1976)
- Issue 4 Pages 1-
- Issue 3 Pages 1-
- Issue 2 Pages 1-
- Issue 1 Pages 1-
Predecessor
Volume 15, Issue 2
Displaying 1-5 of 5 articles from this issue
- |<
- <
- 1
- >
- >|
-
Mitsuru Nasu1976 Volume 15 Issue 2 Pages 1-8
Published: March 25, 1977
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDigital geometric procedures for positioning multiseries remote sensing data have been studied for digital cartographic mapping purposes. Tests with simulated and real data show that the digital approach is feasible. Improvement of sensor exterior orientation by multistage geometric sampling and improved point identification by digital image matching result in higer positioning accuracy.View full abstractDownload PDF (1162K) -
Chuji Mori, Susumu Hattori1976 Volume 15 Issue 2 Pages 9-15
Published: March 25, 1977
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSIn this paper the methods of the extraction of plants cover in an urban area by using an IR colour aerial photograph are discussed. Three colour densities R, G and B are measured and analysed by discriminant analysis to classify into two clusters, plants and other objects.
Some trials transforming the measured three colour densities to other proper quantities are made to reduce the number of variates in discriminant analysis and/or to abate the error. Because the histograms of densities R, G and B do not show a normal distribution, a good result can not be obtained when we use R, G and B as a multivariate vector.
The main results as as follows:
(1) The most suitable coordinates system for separating plants from other objects is logarithmic chromaticity coordinates (B/ (B+G+R), G/ (B+G+R) ), but objects in the shadow and water are misjudged and classified into the plants.
(2) Using the coordinates system (B-R, G-R), corresponding to the Bi-Band ratio, two clusters show a good separation, and moreover (G-R) has no correlation with (B-R) in regard to separation. This fact shows a validity of plants extraction by photographic processing.
(3) An improvement of linear discrminant function by use of the optimal variance-covariance matrix has no notable effect on a decrease in the discriminant error.View full abstractDownload PDF (3110K) -
Sotaro Tanaka, Hiroaki Kano, Yuzo Suga1976 Volume 15 Issue 2 Pages 17-25
Published: March 25, 1977
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSCorrect registration of LANDSAT MSS data to the corresponding topographical map has an important role when using LANDSAT data for various purpose. Even if it were so useful information, difficulty of the registration to the map would cause decreasing of the usefulness. Here a method is considered by which easy registration of LANDSAT data with the corresponding topographical map will be enable and a LANDSAT map was made as an application.
Raw LANDSAT MSS CCT data acquired by NASA has two coordinates axes. One is an orbital axis and another is approximately orthogonal one to it. From this raw data, a new LANDSAT CCT array which is suitable for a 1: 25, 000 topographical map was made. It is called 1: 25, 000 LANDSAT map temporarily Precision of the registration is estimated about ±40m from residual errors on ground control points.
This paper consists of following contents:
1) Method of ground control points selection for LANDSAT image orientation and examples.
2) Measurement method of ground control points on a LANDSAT image and the precision.
3) Concept of LANDSAT map.
4) Algorism for LANDSAT map compilation.
5) Trial LANDSAT map and the evaluation.View full abstractDownload PDF (11958K) -
[in Japanese]1976 Volume 15 Issue 2 Pages 26-30
Published: March 25, 1977
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (2653K) -
[in Japanese]1976 Volume 15 Issue 2 Pages 31-33
Published: March 25, 1977
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (505K)
- |<
- <
- 1
- >
- >|