calibration

Exploring Camera Models, Focusing on Distortion

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This post delves into the specifics of various camera models, exploring the mathematical and geometric concepts used to represent how a camera captures the world. However, when capturing world scenes through a camera, images suffer from distortions due to the physical properties of the lens. T...

[Astrophotography] Calibrating Skywatcher’s Sky Adventurer

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Preparing an equatorial mount for astrophotography requires a precise, multistep calibration process. The primary goal is to accurately align the mount’s rotational axis with the Earth’s axis of rotation. This guide outlines a four-step calibration process using Skywatcher’s Sky Adventurer. Fo...

Calibrating Cameras with Zhang’s Method

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Camera calibration is a fundamental step in many computer vision applications, from 3D reconstruction to augmented reality. It involves estimating the intrinsic parameters of a camera (like focal length, principal point, and lens distortion) and its extrinsic parameters (rotation and translati...