Coverage for /wheeldirectory/casa-6.7.0-12-py3.10.el8/lib/py/lib/python3.10/site-packages/casatasks/private/task_feather.py: 100%

1import os 

2 

3from casatools import imager 

4from casatasks import casalog 

5 

6def feather(imagename=None,highres=None,lowres=None, sdfactor=None, effdishdiam=None, lowpassfiltersd=None): 

7 """ Feathering: Combine two images using the Fourier Addition: 

8  

9 The algorithm converts each image to the gridded visibility 

10 plane, combines them, and reconverts them into an combined 

11 image. The images must have a well-defined beam shape (clean beam), 

12 given in the image, in order for feathering to work well. 

13 The two images must be on the same grid and have the same 

14 flux density normalization scale. 

15 

16 Keyword arguments: 

17 imagename -- Name of output feathered image 

18 default: none; example: imagename='orion_combined' 

19 highres -- Name of high resolution (interferometer) image 

20 default: none; example: imagename='orion_vla.im' 

21 This image is often a clean image obtained from synthesis 

22 observations. 

23 lowres -- Name of low resolution (single dish) image 

24 default: none; example: imagename='orion_gbt.im' 

25 This image is often a image from a single-dish observations 

26 or a clean image obtained from a lower resolution synthesis 

27 observations. 

28 

29 """ 

30 casalog.origin('feather') 

31 

32 imFea=imager( ) 

33 try: 

34 imFea.setvp(dovp=True) 

35 imFea.setsdoptions(scale=sdfactor) 

36 imFea.feather(image=imagename,highres=highres,lowres=lowres, 

37 effdishdiam=effdishdiam, lowpassfiltersd=lowpassfiltersd) 

38 finally: 

39 imFea.done( ) 

40 del imFea