Image-based Modeling Using a Two-step Camera Calibration Method
نویسندگان
چکیده
We present a two-step camera calibration process based on linear least squares formulations. We show how to apply this process to build an integrated modeling environment, in which a scene is modeled by having the user specify, on a given image, a set of reference points (used for camera calibration) and object points (used for positioning the objects in the scene). Once this has been done, synthetic information can be superimposed onto the image and arbitrary views can be produced. Using this methodology, we developed Virtual Referee, an application to analyze soccer plays from still images, generating an OpenGL camera over a 3D field model.
منابع مشابه
An Automatic Camera Calibration Method with Image Registration Technique
We propose a novel technique of automated camera calibration method to obtain internal camera parameters, which enables us to compensate the distortion of an image taken by a camera with zooming lens. The proposed method is based on image registration. First a calibration pattern is transformed onto the distorted image of the pattern using affine transformation. Then the registration of the two...
متن کاملAccurate Camera Calibration and Correction Using Rigidity and Radial Alignment Constraints
In this paper, we develop a novel method for camera calibration and correction. The novel method first employs a rigidity constraint from the rigid rotation matrix and the radial alignment constraint from the pin-hole camera model to estimate both camera intrinsic and extrinsic parameters with a closed-form solution without considering the camera distortion. Then the well-known Levernburg-Marqu...
متن کاملCamera Calibration with Distortion Models and Accuracy Evaluation
The objective of stereo camera calibration is to estimate the internal and external parameters of each camera. Using these parameters, the 3-D position of a point in the scene, which is identified and matched in two stereo images, can be determined by the method of triangulation. In this paper, we present a camera model that accounts for major sources of camera distortion, namely, radial, decen...
متن کاملA Four-step Camera Calibration Procedure with Implicit Image Correction
In geometrical camera calibration the objective is to determine a set of camera parameters that describe the mapping between 3-0 reference coordinates and 2 0 image coordinates. Various methods for camera calibration can be found from the literature. Howevel; surprisingly little attention has been paid to the whole calibration procedure, i.e , control point extraction from images, model Jitting...
متن کاملDocument Image Dewarping Based on Text Line Detection and Surface Modeling (RESEARCH NOTE)
Document images produced by scanner or digital camera, usually suffer from geometric and photometric distortions. Both of them deteriorate the performance of OCR systems. In this paper, we present a novel method to compensate for undesirable geometric distortions aiming to improve OCR results. Our methodology is based on finding text lines by dynamic local connectivity map and then applying a l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998