Classification for high dimensional remote sensing data generally requires a large set of data samples and enormous processing time, especially for hyperspectral image data. In this paper, a fast classification scheme is presented. The first stage of process is to develop a strategy for band selection which is designed based on the canonical analysis (CA) and the concept of loading factors to weigh bands in accordance with their energies. The suggested band selection algorithm allows one to predetermine which bands will be used for data processing so that data dimensionality is greatly reduced. It is then followed by a second stage using a maximum likelihood (ML) classifier which is recursive and designed based on Winograd's algorithm to achieve computational efficiency. The experimental results show that the proposed fast classification scheme reduces the computing time by a factor of 27 to 107 compared to the conventional one-stage ML classifier.
|Number of pages||10|
|Journal||Proceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering|
|Publication status||Published - 1998 Jul 1|
All Science Journal Classification (ASJC) codes