APLpy坐标更改为像素值

Question

有谁知道如何将坐标值更改为APLpy中适合文件图像的像素值？

Answer 1

The only way I could think of is just pass in the data-array instead of the fits file. If it has no WCS information it must operate in pixel-space.

from astropy.io import fits # or import pyfits
with fits.open(filename) as hdus:
    data = hdus[0].data
f1 = aplpy.FITSFigure(data)
# ... whatever you want to do thereafter.

I haven't used APLpy maybe there is a better way but I haven't found anything in the documentation.