API Reference

Python API documentation for tetra3rs, auto-generated from type stubs.

Core Classes

Class	Description
SolverDatabase	Star pattern database — generate, save/load, and solve
CameraModel	Camera intrinsics — focal length, optical center, parity, distortion
SolveResult	Plate-solve result — attitude, WCS, matched stars, pixel↔sky conversions
CalibrateResult	Camera calibration result — fitted camera model and statistics

Centroid Extraction

Symbol	Description
extract_centroids()	Extract star centroids from an image array (connected-component pipeline; default)
extract_centroids_fast()	Fast single-pass extractor — lower latency, lower fidelity ("adequate star tracker")
ExtractionResult	Extraction result with centroids and image statistics
Centroid	A single star centroid with position, brightness, and shape

Distortion Models

Class	Description
RadialDistortion	Brown-Conrady distortion model — radial (k1, k2, k3) + optional tangential (p1, p2)
PolynomialDistortion	SIP-like polynomial distortion model

Module-Level Functions

Function	Description
earth_barycentric_velocity()	Approximate Earth barycentric velocity for aberration correction