Rice automatic mapping method based on ratio index of water body and vegetation index changes
A technology of vegetation index and ratio index, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of low value of EVI time series data, rising water body index, lower than water body index, etc., to eliminate the water body index. Effects of changing interference, eliminating noise and precipitation, and improving classification accuracy
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[0027] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.
[0028] A kind of rice automatic mapping method based on the ratio index of water body and vegetation index change of the present invention comprises the following steps,
[0029] S01: Construct a smooth water body index and vegetation index time series data set;
[0030] S02: Eliminate non-vegetation and evergreen vegetation pixels in the study area;
[0031] S03: Obtain the peak growth period corresponding to each vegetation growth cycle pixel by pixel;
[0032] S04: Calculate the change range of water body index and vegetation index from the beginning of vegetation growth to the period of full growth;
[0033] S05: Construct the ratio index of water body and vegetation index change;
[0034] S06: Rice mapping based on the ratio index of water body and vegetation index change.
[0035] The method of the invention is applicable to the...
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