#immoments
- cubeデータを様々な方法で軸を減らすことができるcasaのtaskの一つ
- 例えば、cubeを積分強度や速度場、速度分散などにできる
- 公式ドキュメントはこちら
##指定できるパラメーター
imagename = '' # Name of the input image
moments = [0] # List of moments you would like to compute
axis = 'spectral' # The momement axis: ra, dec, lat, long, spectral, or stokes
region = '' # Region selection. Default is to use the full image.
box = '' # Rectangular region(s) to select in direction plane. Default is to use the entire direction plane.
chans = '' # Channels to use. Default is to use all channels.
stokes = '' # Stokes planes to use. Default is to use all Stokes planes.
mask = '' # Mask to use. Default is none.
includepix = -1 # Range of pixel values to include
excludepix = -1 # Range of pixel values to exclude
outfile = '' # Output image file name (or root for multiple moments)
とりあえずは、
- imagename
- moments
- outfile
を指定すればよい。
momentsは以下を参考に値を指定する。
moments=0 - 積分強度
moments=1 - 速度場
moments=2 - 速度分散
moments=3 - 強度の中央値
moments=4 - coordinateの中央値
moments=5 - スペクトルの平均の標準偏差
moments=6 - root mean square of the spectrum
moments=7 - absolute mean deviation of the spectrum
moments=8 - スペクトルの最大値
moments=9 - coordinate of the maximum value of the spectrum
moments=10 - スペクトルの最小値
moments=11 - coordinate of the minimum value of the spectrum
##参考スクリプト
- 積分強度を作成し、imageを出力
immoments.py
import os
import pyfits
fname = "oooo.image" or "xxxxx.fits"
fn = os.path.splitext(fname)[0]
outfile = fn+"_mom０"
immoments(imagename = fname,
moments = [0],
outfile = outfile+".image")
exportfits(imagename = outfile+".image",
fitsimage = outfile+".fits",
dropdeg = True,
overwrite = True,
history = False)
その他の関数はこちら