A method for estimation of TOA: Top of the Atmosphere radiance of which upward and downward polarized radiance is taken into account based on Successive Orders of Scattering method is proposed. The proposed method is compared to the existing method which is not taken into account the upward polarized radiance with the measured data which are acquired using polarization radiometer and sky-radiometer. It is found that the difference between the proposed and the existing method are ranged from 1 to 9% depending upon the observation parameter, solar zenith angle, real and imaginary part of the aerosol refractive index, size distribution (Junge parameter) and surface reflectance. It is also found that the difference for urban aerosol type is greater than continental and maritime aerosols.
Recently, laser scanners have been receiving more attention as a useful tool for real-time 3D data acquisition, and various applications such as city modeling, DTM generation and 3D modeling of cultural heritage were proposed. However, 3D modeling using point cloud data are still issues. In particular, efficient extraction of interest points for generating TIN model should be resolved. With this motive, efficient extraction of interest points in point crowd data and 3D modeling of historical structure are investigated in this paper. The method is based on surface flatness, and surface is classified into flat area (ground surface, wall of buildings, etc.) and non flat area (trees, bushes etc.) . Furthermore, break-line is detected as boundary between flat and non flat area, and each flat area is segmented using break-lines. The most remarkable point of this method is its ability to extract interest points for generating TIN model using 3D information for each point on the detected break line.
This paper introduces a method for colourizing the black and white (B/W) air photos by transferring colour information from another colour air photos that capture the same vegetations at the same season. Air photos taken by U.S. Air Force just after WWII were the first ones that cover whole Japan. As they are available only in B/W, the imagery has not been fully utilized. In our method, land cover was roughly categorized on a B/W image, whereas colour information for each category was taken from colour source images. Then colour information and original intensity information of the B/W image were combined in the HSI colour space. A questionnaire on photo interpretation experts revealed that the proposed method worked well for the photos. Additionally, rough categorization was enough for the method and the colourized photos might improve interpretation efficiency. The colourized images should be used for various purposes such as 3D landscape visualisation.
Although satellite remote sensing provide large-scale coverage of traditional agricultural region, most “high-resolution” instruments, such as Landsat ETM+, SPOT HRVIR, provide limited descriptive resolution of the Japanese traditional agricultural landscape. With the launch of the IKONOS satellite in 1999, imagery with a 4m spatial resolution in multispectral mode can now be combined with other satellite data archives for change detection. We demonstrate this potential by combining SPOT/Landsat and IKONOS image to detect change in the traditional terrace rice fields for Awaji Island, Hyogo, Japan. According to our analysis using data in 1987 and 2001, losses in rice paddy fields over this period are faster at the hilly mountainous region and slower in flat agricultural region. Synergetic use of IKONOS and SPOT/Landsat appears to be a relevant source of information to show change and fragmentation in traditional terrace rice fields.