Blind Detection and Compensation of Camera Lens Geometric Distortions

نویسندگان

  • Lili Ma
  • Yangquan Chen
  • Kevin L. Moore
چکیده

This paper presents a blind detection and compensation technique for camera lens geometric distortions. The lens distortion introduces higher-order correlations in the frequency domain and in turn it can be detected using higher-order spectral analysis tools without assuming any specific calibration target. The existing blind lens distortion removal method only considered a single-coefficient radial distortion model. In this paper, two coefficients are considered to model approximately the geometric distortion. All the models considered have analytical closed-form inverse formulae.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Document 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 کامل

Modelling and Removal of Distortions in Images

This thesis investigates the compensation and minimisation of distortions in images. Various forms of non-linear lens distortions are modelled and removed. Projective linear distortions are further minimised to give the closest ideal projection from erroneous cameras. Traditional camera calibration treats lens distortion simultaneously with camera pose and lens scaling factors. This often leads...

متن کامل

Wide-angle camera distortions and non-uniform illumination in mobile robot tracking

In this paper some fundamentals and solutions to accompanying problems in vision system design for mobile robot tracking are presented. The main topics are correction of camera lens distortion and compensation of non-uniform illumination. Both correction methods contribute to vision system performance if implemented in the appropriate manner. Their applicability is demonstrated by applying them...

متن کامل

Geometric Modelling and Calibration of Fisheye Lens Camera Systems

The paper describes a geometric projection model for fisheye lenses and presents results of the calibration of fisheye lens camera systems based on it. For fisheye images the real projection model does not comply with the central perspective. In addition, the lenses are subject to considerable distortions. The fisheye lens projection follows an approximately linear relation between the incidenc...

متن کامل

Improved motion compensation for 360° video projected to polytopes

360◦ video consists of images capturing the complete scene as seen from a single point in any direction. In contrast to conventional images, 360◦ images cannot be natively represented in a planar fashion. Consequently, video created from a sequence of 360◦ images suffers from geometric distortions. These are caused by mapping of the images from a sphere in 3D space to a planar image. This paper...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • CoRR

دوره cs.CV/0405095  شماره 

صفحات  -

تاریخ انتشار 2004