サマリー
Calculates statistics for each cell of an image based on a defined focal neighborhood.
説明
For more information about the methods and band orders used with this function, see the Statistics raster function.
The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.
構文
Statistics (raster, kernel_columns, kernel_rows, stat_type, {fill_no_data_only})
パラメーター | 説明 | データ タイプ |
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. (デフォルト値は次のとおりです 3) | Integer |
kernel_rows | The number of pixel rows to use in your focal neighborhood dimension. (デフォルト値は次のとおりです 3) | Integer |
stat_type | Specify the type of statistics to calculate.
(デフォルト値は次のとおりです None) | String |
fill_no_data_only | Specify whether NoData values are ignored in the analysis.
(デフォルト値は次のとおりです False) | Boolean |
データ タイプ | 説明 |
Raster | The output raster. |
コードのサンプル
Fills in NoData values with the majority value in a 5 by 5 neighborhood for categorical data.
from arcpy.ia import *
LandCover_filled = arcpy.ia.Statistics("LandCover.tif", 5, 5, "majority", True)
LandCover_filles.save("LandCover_majority_5_by_5.tif")
Smooths an elevation raster in a 3 by 3 neighborhood using mean value.
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")