| タイトル | Scale effects: HCMM data simulation. Usage of filtering techniques for scaling-up simulations |
| 本文（外部サイト） | http://hdl.handle.net/2060/19810004891 |
| 著者（英） | Digennaro, V. |
| 著者所属（英） | Centro Studi ed Applicazioni in Tecnologie Avanzate |
| 発行日 | 1980-01-01 |
| 言語 | eng |
| 内容記述 | Image reduction used to simulate increase in altitude of an acquisition platform is equivalent to data smoothing, and can be achieved either by neighborhood averaging or by filtering techniques. The averaging approach is limited for accurate simulation. A filtering method is described which was based on the hypothesis that all changes due to altitude increase can be represented by a point spread function. Determination of the scale function and factor are discussed as well as implementation of the filtering. Filtering can be either in the spatial or frequency domain. In the spatial domain, filtering consists of the convolution of the image with the weights mask, and then of the declination of the points according to the appropriates scale factor. A simulation of an aircraft day image in the infrared channel is examined. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 81N13402
NASA-CR-163751
E81-10041 |
| 権利 | No Copyright |
