摘要
基于已定义的焦点邻域计算影像中各像元的统计数据。
语法
Statistics (raster, kernel_columns, kernel_rows, stat_type, {fill_no_data_only})
参数 | 说明 | 数据类型 |
raster | The input raster on which to perform focal statistics. | Raster |
kernel_columns | The number of pixel columns to use in your focal neighborhood dimension. (默认值为 3) | Integer |
kernel_rows | The number of pixel rows to use in your focal neighborhood dimension. (默认值为 3) | Integer |
stat_type | Specify the type of statistics to calculate.
(默认值为 None) | String |
fill_no_data_only | Specify whether NoData values are ignored in the analysis.
(默认值为 False) | Boolean |
数据类型 | 说明 |
Raster | 输出栅格。 |
代码示例
使用 5 x 5 邻域中的多数值填写 NoData 值,以获取分类数据。
from arcpy.ia import *
LandCover_filled = arcpy.ia.Statistics("LandCover.tif", 5, 5, "majority", True)
LandCover_filles.save("LandCover_majority_5_by_5.tif")
使用平均值对 3 x 3 邻域中的高程栅格进行平滑处理。
import arcpy
from arcpy import env
from arcpy.ia import *
# Set environment settings
env.workspace = "C:/statistics_example/data"
# Set local variables
inRaster = "elevation.tif"
kernel_columns=3
kernel_rows=3
stat_type="Mean"
fill_no_data_only = False
# for each pixel, calculate the average value of pixels within its neighborhood. the neighborhood size is 5x5
output = Statistics(imagePath1, kernel_columns, kernel_rows, stat_type, fill_no_data_only)
output.save("statistics_mean_5_by_5.tif")