lsst.ip.isr.ptcDataset Namespace Reference

Classes
class	PhotonTransferCurveDataset

Functions
	symmetrize (inputArray)

Detailed Description

Define dataset class for MeasurePhotonTransferCurve task

Function Documentation

symmetrize()

lsst.ip.isr.ptcDataset.symmetrize

(

inputArray

)

 Copy array over 4 quadrants prior to convolution.

Parameters
----------
inputarray : `numpy.array`
    Input array to symmetrize.

Returns
-------
aSym : `numpy.array`
    Symmetrized array.

Definition at line 40 of file ptcDataset.py.

def symmetrize(inputArray):
    """ Copy array over 4 quadrants prior to convolution.
 
    Parameters
    ----------
    inputarray : `numpy.array`
        Input array to symmetrize.
 
    Returns
    -------
    aSym : `numpy.array`
        Symmetrized array.
    """
 
    targetShape = list(inputArray.shape)
    r1, r2 = inputArray.shape[-1], inputArray.shape[-2]
    targetShape[-1] = 2*r1-1
    targetShape[-2] = 2*r2-1
    aSym = np.ndarray(tuple(targetShape))
    aSym[..., r2-1:, r1-1:] = inputArray
    aSym[..., r2-1:, r1-1::-1] = inputArray
    aSym[..., r2-1::-1, r1-1::-1] = inputArray
    aSym[..., r2-1::-1, r1-1:] = inputArray
 
    return aSym