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StarMetrics

astroimage

Struct StarMetrics 

Source 
pub struct StarMetrics {
Show 14 fields
    pub x: f32,
    pub y: f32,
    pub peak: f32,
    pub flux: f32,
    pub fwhm_x: f32,
    pub fwhm_y: f32,
    pub fwhm: f32,
    pub eccentricity: f32,
    pub snr: f32,
    pub hfr: f32,
    pub theta: f32,
    pub beta: Option<f32>,
    pub fit_method: FitMethod,
    pub fit_residual: f32,

}
Expand description

Quantitative metrics for a single detected star.

Fields§

§x: f32

Subpixel centroid X.

§y: f32

Subpixel centroid Y.

§peak: f32

Background-subtracted peak value (ADU).

§flux: f32

Total background-subtracted flux (ADU).

§fwhm_x: f32

FWHM along major axis (pixels).

§fwhm_y: f32

FWHM along minor axis (pixels).

§fwhm: f32

Geometric mean FWHM (pixels).

§eccentricity: f32

Eccentricity: 0 = round, approaching 1 = elongated.

§snr: f32

Per-star aperture photometry SNR.

§hfr: f32

Half-flux radius (pixels).

§theta: f32

PSF position angle in radians, counter-clockwise from +X axis. Orientation of the major axis (fwhm_x direction). 0.0 when Gaussian fit is disabled and star is nearly round.

§beta: Option<f32>

Moffat β parameter (None if Gaussian/moments fit was used).

§fit_method: FitMethod

Which PSF fitting method produced this measurement.

§fit_residual: f32

Normalized fit residual (quality weight: w = 1/(1+r)). Lower = better fit. 1.0 for moments fallback.

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