A PDE Method to Segment Image Linear Objects with Application to Lens Distortion Removal

A PDE Method to Segment Image Linear Objects with Application to Lens distortion Removal

In this paper, we propose a partial differential equation based method to segment image objects, which have a given parametric shape based on energy functional. The energy functional is composed of a term that detects object boundaries and a term that constrains the contour to find a shape compatible with the parametric shape. While the shape constraints guiding the PDE may be determined from o...

a new type-ii fuzzy logic based controller for non-linear dynamical systems with application to 3-psp parallel robot

abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...

Blind removal of lens distortion.

Virtually all imaging devices introduce some amount of geometric lens distortion. A technique is presented for blindly removing these distortions in the absence of any calibration information or explicit knowledge of the imaging device. The basic approach exploits the fact that lens distortion introduces specific higher-order correlations in the frequency domain. These correlations can be detec...

A Scale-Preserving Lens Distortion Model and its Application to Image Registration

This paper presents a model for correcting the effects of barrel and pincushion lens distortion that preserves the scale of the captured image. This is significant as the model is able to correct for a practical range of the aforementioned types of lens distortion while maintaining the scale helps minimize the loss of the corrected image’s resolution. The functional inverse of the model is deri...

A Novel Method for Measuring, Regardless of Image Distortion and Lens Varying Specifications in Endoscopic Treatment of Vesicoureteral Reflux