eloy.psf

Point Spread Function (PSF) modeling utilities.

This module provides functions for estimating PSF parameters using image moments and fitting 2D Gaussian models to image data.

Attributes

gaussian_sigma_to_fwhm

Functions

moments(data)	Estimate the moments of a 2D distribution.
fit_gaussian(data[, init])	Fit a 2D Gaussian to the data.

Module Contents

eloy.psf.gaussian_sigma_to_fwhm

eloy.psf.moments(data)

Estimate the moments of a 2D distribution.

Parameters:

data (np.ndarray) – 2D image data.

Returns:

Dictionary of estimated parameters: amplitude, x, y, sigma_x, sigma_y, background, theta, beta.

Return type:

dict

eloy.psf.fit_gaussian(data, init=None)

Fit a 2D Gaussian to the data.

Parameters:

• data (np.ndarray) – 2D image data.

• init (dict or None, optional) – Initial parameter estimates.

Returns:

Dictionary of fitted parameters: amplitude, x, y, sigma_x, sigma_y, theta, background.

Return type:

dict