Alignment & Geometry#
The task of the alignment and geometry blocks is to compute and apply geometric transformations to the Image
sources. For this purpose, an Image contains a
transform attrtibute, that corresponds to a scikit-image
Transform computation blocks#
FAQ: Why computing the transform without applying it?
To control when to apply the transform and to which data. For example, transforming an image
data to a common reference (e.g. with interpolation) could be only wanted at the end of a sequence in order to build a stack image.
Other geometry blocks#
Create cutouts around all sources
Set Image sources to reference sources (from a reference Image) aligned to the Image
Create WCS based on a reference containing a valid WCS.
transform object stores the geometric transform between the Image and a reference one, so that it is not directly related to the physical WCS of the image (which transforms to physical sky coordinates).