Image Arithmetics and Combining#
Image Arithmetics (imarith
)#
Todo
Write imarith documentation
Image Combining (imcombine
)#
Combining images is performed in astropop using the imcombine
function. It is designed to combine FrameData
using several methods and rejection algorithms.
The current combine methods are:
- median
- average
- sum
The current rejection methods are:
- minmax_clip
- sigma_clip
Math Details#
Todo
describe the error computing here
Sum Combine#
Sigma Clipping#
To perform sigma clipping, it is recomended to use median
as central tendency and mad_std
as deviation estimation. These two estimators handle outliers better then the mean and standard deviation of the distribution, so produce much better results in sigma clipping. A detailed analysis can be found on the CCD Data Reduction Guide.
API#
astropop.image.imarith Module#
Perform math operations with astronomical images in FrameData contianer.
|
Perform arithmetic operations using |
astropop.image.imcombine Module#
Stack and combine astronomical images in FrameData.
|
Combine a list of images or frames in a single one. |
|
Process the combining operation of images, like the IRAF imcombine. |