plot_focal_length_temperature_dependence

giant.calibration.visualizer:

giant.calibration.visualizer.plot_focal_length_temperature_dependence(calib, show_individual_focal_lengths=True, pdf_name=None)

This function generates a figure of the camera model’s focal length temperature dependence.

The temperature dependence is shown over the range of temperatures of the camera for the images currently contained in the images in the camera as a line. Optionally, if show_individual_focal_lengths is set to True, this function will go through and estimate just the focal length with no temperature dependence for each image individually (holding all other parameters of the camera model fixed) and plot these individual focal lengths as a scatter plot on the figure. If this is requested, then id_stars() must have been called at least once.

Note that this function assumes that the camera model being estimated is a subclass of PinholeModel here and that it follows the same convention for the temperature dependence as the PinholeModel. If the camera model being estimated does not implement a get_temperature_scale() then this function will raise an exception. Additionally, if it deviates significantly from the PinholeModel and its subclasses in the way it handles focal length/temperature dependence this function will likely run into issues, therefore it is recommended to either use one of the existing GIANT PinholeModel subclasses or be extra careful in how you implement your own camera model to mimic the PinholeModel

Raises:

ValueError – if the camera model doesn’t implement a get_temperature_scale() method.

Parameters:

• calib (Calibration) – The calibration object to plot the results for

• show_individual_focal_lengths (bool) – A boolean flag specifying whether to plot the individual focal lengths for each image

• pdf_name (Path | str | None) – Save the plot to this file name as a pdf