# FITS_tools Package¶

## image_registration.FITS_tools Package¶

### Functions¶

 fits_overlap(file1, file2, **kwargs) Create a header containing the exact overlap region between two .fits files get_cd(wcs[, n]) Get the value of the change in world coordinate per pixel across a linear axis. header_overlap(hdr1, hdr2[, max_separation, ...]) Create a header containing the exact overlap region between two .fits files load_data(data) Attempt to load an image specified as an HDU, a string pointing to a FITS load_header(header) Attempt to load a header specified as a header, a string pointing to a FITS match_fits(fitsfile1, fitsfile2[, header, ...]) Project one FITS file into another’s coordinates project_to_header(fitsfile, header, **kwargs) Reproject an image to a header. register_fits(fitsfile1, fitsfile2[, ...]) Determine the shift between two FITS images using the cross-correlation technique.

## image_registration.FITS_tools.match_images Module¶

### Functions¶

 project_to_header(fitsfile, header, **kwargs) Reproject an image to a header. match_fits(fitsfile1, fitsfile2[, header, ...]) Project one FITS file into another’s coordinates register_fits(fitsfile1, fitsfile2[, ...]) Determine the shift between two FITS images using the cross-correlation technique.

## image_registration.FITS_tools.fits_overlap Module¶

### Functions¶

 fits_overlap(file1, file2, **kwargs) Create a header containing the exact overlap region between two .fits files header_overlap(hdr1, hdr2[, max_separation, ...]) Create a header containing the exact overlap region between two .fits files