diffraction

This module contains utility functions for processing electron diffraction patterns.

Functions

apply_transformation(z, transformation, ...)	Apply a transformation to a 2-dimensional array.
center_of_mass_from_image(z[, mask, threshold])	Estimate direct beam position by calculating the center of mass of the image.
circular_mask(shape, radius[, center])	Produces a mask of radius 'r' centered on 'center' of shape 'shape'.
convert_affine_to_transform(D, shape)	Converts an affine transform on a diffraction pattern to a suitable form for skimage.transform.warp()
ellipse_perimeter(r, c, r_radius, c_radius)	Generate ellipse perimeter coordinates.
fftconvolve(in1, in2[, mode, axes])	Convolve two N-dimensional arrays using FFT.
find_beam_center_blur(z, sigma[, ...])	Estimate direct beam position by blurring the image with a large Gaussian kernel and finding the maximum.
find_beam_center_interpolate(z, sigma[, ...])	Find the center of the primary beam in the image img by summing along X/Y directions and finding the position along the two directions independently.
find_beam_offset_cross_correlation(z, ...)	Find the offset of the direct beam from the image center by a cross-correlation algorithm.
find_center_of_mass(signal[, threshold, mask])
find_hot_pixels(z[, threshold_multiplier, mask])	Find single pixels which have much larger values compared to neighbors.
gain_normalise(z, dref, bref)	Apply gain normalization to experimentally acquired electron diffraction pattern.
investigate_dog_background_removal_interactive(...)	[Deprecated] Utility function to help the parameter selection for the difference of gaussians (dog) background subtraction method
is_cupy_array(array)	Convenience function to determine if an array is a cupy array
isiterable(obj)
match_template(image, template[, pad_input, ...])	Match a template to a 2-D or 3-D image using normalized correlation.
match_template_dilate(image, template[, ...])	Matches a template with an image using a window normalized cross-correlation.
normalize_template_match(z, template[, ...])	Matches a template with an image z.
peaks_as_gvectors(z, center, calibration)	Converts peaks found as array indices to calibrated units, for use in a hyperspy map function.
phase_cross_correlation(reference_image, ...)	Efficient subpixel image translation registration by cross-correlation.
reference_circle(coords, dimX, dimY, radius)	Draw the perimeter of an circle at a given position in the diffraction pattern (e.g. to provide a reference for finding the direct beam center).
regional_filter(z, h)	Perform a h-dome regional filtering of the an image for background subtraction.
remove_bad_pixels(z, bad_pixels)	Replace values in bad pixels with mean of neighbors.
remove_dead(z, deadpixels)	Remove dead pixels from experimental electron diffraction patterns.

Classes

Version(version)	This class abstracts handling of a project's versions.
deprecated(since[, alternative, ...])	Decorator to mark deprecated functions with an informative warning.
interp1d(x, y[, kind, axis, copy, ...])	Interpolate a 1-D function (legacy).
tqdm(*_, **__)	Decorate an iterable object, returning an iterator which acts exactly like the original iterable, but prints a dynamically updating progressbar every time a value is requested.