Name
Abstract | ||
|---|---|---|
We address the problem of restoring a static planar scene degraded by skewing effect when imaged through adynamic water surface. In particular, we investigate geometric distortions due to unidirectional cyclic waves and circular ripples,phenomena that are most prevalent in fluid flow. Although the camera and scene are stationary, light rays emanating from a scene undergo refraction at the fluid–air interface. This refraction effect is time varying for dynamic fluids and results in nonrigid distortions (skew) in the captured image. These distortions can be associated with motion blur depending on the exposure time of the camera. In the first part of this paper, we establish the condition under which the blur induced due to unidirectional cyclic waves can be treated as space invariant. We proceed to derive a mathematical model for blur formation and propose a restoration scheme using a single degraded observation. In the second part, we reveal how the blur induced by circular ripples(though space variant) can be modeled as uniform in the polar domain and develop a method for deskewing. The proposed methods are tested on synthetic as well as real examples. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/TIP.2015.2395814 | IEEE transactions on image processing : a publication of the IEEE Signal Processing Society |
Keywords | Field | DocType |
light rays,polar domain,skew,motion blur,geometric distortions,static planar scene restoration,acoustic imaging,camera,refraction effect,fluid-air interface,mathematical model,unidirectional waves,space-variant,image restoration,dynamic water surface,single degraded observation,underwater image deskewing,fluid flow,circular ripples,geophysical image processing,cameras,oceanographic techniques,dynamic fluids,skewing effect,unidirectional cyclic waves,underwater imaging,space-invariant,nonrigid distortions,image motion analysis,dynamics,noise | Computer vision,Ray,Refraction,Motion blur,Planar,Invariant (mathematics),Artificial intelligence,Skew,Image restoration,Mathematics,Underwater | Journal |
Volume | Issue | ISSN |
24 | 3 | 1941-0042 |
Citations | PageRank | References |
2 | 0.39 | 25 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Karthik Seemakurthy | 1 | 2 | 0.39 |
| A. N. Rajagopalan | 2 | 1106 | 92.02 |