Patent ID: 9639980
Date: 2017-05-02
CPC Classifications: G06T

Claim:
1. An image processing apparatus comprising: a memory; and a processor performs following: an acquiring section that acquires DEM data indicating digital elevation of each lattice-shaped area in a predetermined map region; a trend calculating section that calculates any of slope amounts, a standard deviation of the elevation, a variance of the elevation, and relief amounts of the predetermined map region as one of trends of terrain in the predetermined map region indicated by the DEM data acquired by the acquiring section; a selecting section that selects at least one of a plurality of line filters that filters data which is continuous in one direction in the map region and a plurality of matrix filters that filters data constituting a two-dimensional region in the map region on the basis of the one of trends of terrain calculated by the trend calculation section; a filter processing section that conducts filter processing of the DEM data acquired by the acquiring section by a filter selected by the selecting section; and an outputting section that outputs the DEM data after being filtered in the filter processing.