As-built design specification of software for cluster-based proportion estimation
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Chu, N. Y.↗
Engineering topics
Chu, N. Y.
Publications and source records attributed to Chu, N. Y..
Automatic color map digitization by spectral classification
A method of converting polygon map information into a digital form which does not require manual tracing of polygon edges is discussed. The maps must be in color-coded format with a unique color for each category in the map. Color scanning using a microdensitometer is employed and a three-channel color separation digital data set is generated. The digital data are then classified by using a Gaussian maximum likelihood classifier, and the resulting digitized map is evaluated. Very good agreement is observed between the classified and original map.
Chu, N. Y.↗