eloy.viz

eloy.viz#

Visualization utilities for astronomical images.

This module provides functions for image scaling and for plotting marks and labels on matplotlib axes.

Functions#

z_scale(data[, c])

Compute z-scale interval for image display.

plot_marks(x, y[, label, position, offset, fontsize, ...])

Plot circular marks and optional labels on a matplotlib axis.

Module Contents#

eloy.viz.z_scale(data, c=0.05)[source]#

Compute z-scale interval for image display.

Parameters:

  • data (np.ndarray) – 2D image data.

  • c (float, optional) – Contrast parameter for ZScaleInterval.

Returns:

(vmin, vmax) for display scaling.

Return type:

tuple

eloy.viz.plot_marks(x, y, label=None, position='bottom', offset=7, fontsize=12, color=[0.51, 0.86, 1.0], ms=12, n=None, inside=True, alpha=1, ax=None)[source]#

Plot circular marks and optional labels on a matplotlib axis.

Parameters:

  • x (array-like) – X coordinates.

  • y (array-like) – Y coordinates.

  • label (array-like or None, optional) – Labels for each mark.

  • position (str, optional) – Position of the label (“top” or “bottom”).

  • offset (float, optional) – Offset for label position.

  • fontsize (int, optional) – Font size for labels.

  • color (list or str, optional) – Color for marks and labels.

  • ms (float, optional) – Marker size.

  • n (int or None, optional) – Number of marks to plot.

  • inside (bool, optional) – Only plot marks inside axis limits.

  • alpha (float, optional) – Alpha transparency.

  • ax (matplotlib.axes.Axes or None, optional) – Axis to plot on.

Return type:

None

Contents