coalignment

This package implements functions for coaligning image data.

sunkit_image.coalignment Module

This module provides routines for the co-alignment of images and MapSequence objects through both template matching and corrections due to solar rotation.

Functions

calculate_shift(this_layer, template)

Calculates the pixel shift required to put the template in the "best" position on a layer.

clip_edges(data, yclips, xclips)

Clips off the "y" and "x" edges of a 2D array according to a list of pixel values.

calculate_clipping(y, x)

Return the upper and lower clipping values for the "y" and "x" directions.

match_template_to_layer(layer, template)

Calculate the correlation array that describes how well the template matches the layer.

find_best_match_location(corr)

Calculate an estimate of the location of the peak of the correlation result in image pixels.

get_correlation_shifts(array)

Estimate the location of the maximum of a fit to the input array.

parabolic_turning_point(y)

Find the location of the turning point for a parabola y(x) = ax^2 + bx + c, given input values y(-1), y(0), y(1).

check_for_nonfinite_entries(layer_image, ...)

Issue a warning if there is any nonfinite entry in the layer or template images.

apply_shifts(mc, yshift, xshift[, clip])

Apply a set of pixel shifts to a MapSequence, and return a new MapSequence.

mapsequence_coalign_by_match_template(mc[, ...])

Co-register the layers in a MapSequence according to a template taken from that MapSequence.

calculate_match_template_shift(mc[, ...])

Calculate the arcsecond shifts necessary to co-register the layers in a MapSequence according to a template taken from that MapSequence.

calculate_solar_rotate_shift(mc[, layer_index])

Calculate the shift that must be applied to each map contained in a mapsequence in order to compensate for solar rotation.

mapsequence_coalign_by_rotation(mc[, ...])

Move the layers in a mapsequence according to the input shifts.