抄録
A method for Earth observation satellite image database retrieve based on indexing of the spatial features extracted from the imagery data is proposed. In order to extract edges from the imagery data, the well known relaxation method and the thining algorithm are used. From the edges, spatial features, line, arc as well as circle are extracted. The proposed method is compared to the generalized Hough conversion method. It is found that the proposed method allows to extract arbitrary spatial features intentionally while the generalized Hough conversion method does not because the control parameters of the method is not enough. It is also found that the required computer resources are almost compatible. Using such spatial features, the portion of images with such features are retrieved from the imagery data.
