doblot

drizzle.doblot.doblot(source, source_wcs, blot_wcs, exptime, coeffs=True, interp=u'poly5', sinscl=1.0, stepsize=10, wcsmap=None)

Low level routine for performing the ‘blot’ operation.

Create a single blotted image from a single source image. The interface is compatible with STScI code. All distortion information is assumed to be included in the WCS specification of the ‘output’ blotted image given in ‘blot_wcs’.

Parameters:

source : 2d array

Input numpy array of the source image in units of ‘cps’.

source_wcs : wcs

The source image WCS.

blot_wcs : wcs

The blotted image WCS. The WCS that the source image will be resampled to.

exptime : float

The exposure time of the input image.

interp : str, optional

The type of interpolation used in the blotting. The possible values are “nearest” (nearest neighbor interpolation), “linear” (bilinear interpolation), “poly3” (cubic polynomial interpolation), “poly5” (quintic polynomial interpolation), “sinc” (sinc interpolation), “lan3” (3rd order Lanczos interpolation), and “lan5” (5th order Lanczos interpolation).

sincscl : float, optional

The scaling factor for sinc interpolation.

Returns:

A 2d numpy array with the blotted image

Other Parameters:  

coeffs : bool, optional

Not used. Only kept for backwards compatibility.

stepsize : float, optional

Was used when input to output mapping was computed internally. Is no longer used and only here for backwards compatibility.

wcsmap : function, optional

Was used when input to output mapping was computed internally. Is no longer used and only here for backwards compatibility.