Sharpening and contrast enhancement of atmospheric turbulence degraded video sequences
- Robinson, Philip, Walters, Bryn, Clarke, Willem
- Authors: Robinson, Philip , Walters, Bryn , Clarke, Willem
- Date: 2010
- Subjects: Atmospheric turbulence , Heat shimmer , Scinitillation , Terrestrial , Blind deconvolution , Illuminance , Reflectance
- Language: English
- Type: Abstract: Long range imaging systems that capture video through the atmosphere face a major problem in the form of atmospheric turbulence. This turbulence causes a phenomenon called heat shimmer which appears as a blurring and a wavering geometric distortion of the target scene which limits the effective range of the imaging system. We explore an image processing approach to mitigating the blurring effect of this distortion by using a blind deconvolution technique to sharpen the video signal and a dynamic illuminance-reflectance correction technique to improve the signal’s contrast. The algorithm is implemented on a Graphics Processing Unit to achieve near real-time performance. , Conference proceedings
- Identifier: http://hdl.handle.net/10210/16817 , uj:15811 , Robinson, P.E. & Clarke, W.A. Sharpening and Contrast enhancement of atmospheric turbulence degraded video sequences. Proceedings of the Twenty-First Annual Symposium of the Pattern Recognition Association of South Africa, November 2010, pp 247-252.
- Full Text:
- Authors: Robinson, Philip , Walters, Bryn , Clarke, Willem
- Date: 2010
- Subjects: Atmospheric turbulence , Heat shimmer , Scinitillation , Terrestrial , Blind deconvolution , Illuminance , Reflectance
- Language: English
- Type: Abstract: Long range imaging systems that capture video through the atmosphere face a major problem in the form of atmospheric turbulence. This turbulence causes a phenomenon called heat shimmer which appears as a blurring and a wavering geometric distortion of the target scene which limits the effective range of the imaging system. We explore an image processing approach to mitigating the blurring effect of this distortion by using a blind deconvolution technique to sharpen the video signal and a dynamic illuminance-reflectance correction technique to improve the signal’s contrast. The algorithm is implemented on a Graphics Processing Unit to achieve near real-time performance. , Conference proceedings
- Identifier: http://hdl.handle.net/10210/16817 , uj:15811 , Robinson, P.E. & Clarke, W.A. Sharpening and Contrast enhancement of atmospheric turbulence degraded video sequences. Proceedings of the Twenty-First Annual Symposium of the Pattern Recognition Association of South Africa, November 2010, pp 247-252.
- Full Text:
Mitigation of atmospheric turbulence distortions in long range video surveillance
- Robinson, P. E., Clarke, W. A.
- Authors: Robinson, P. E. , Clarke, W. A.
- Date: 2011
- Subjects: Atmospheric turbulence , Scintillation , Heat shimmer , Graphics processing units , Optical flow , Deblurring , Quality metrics
- Type: Article
- Identifier: http://hdl.handle.net/10210/16412 , uj:15771 , Citation: Robinson, P.E. & Clarke, W.A. 2011. Mitigation of atmospheric turbulence distortions in long range video surveillance, SAIEE Africa Research Journal, 102(1) March:16-28.
- Description: Abstract: This paper explores the problem of atmospheric turbulence in long range video surveillance. This turbulence causes a phenomenon called heat scintillation or heat shimmer which introduces distortions into the video being captured. The nature of these distortions is discussed and a number of possible solutions explored.
- Full Text:
- Authors: Robinson, P. E. , Clarke, W. A.
- Date: 2011
- Subjects: Atmospheric turbulence , Scintillation , Heat shimmer , Graphics processing units , Optical flow , Deblurring , Quality metrics
- Type: Article
- Identifier: http://hdl.handle.net/10210/16412 , uj:15771 , Citation: Robinson, P.E. & Clarke, W.A. 2011. Mitigation of atmospheric turbulence distortions in long range video surveillance, SAIEE Africa Research Journal, 102(1) March:16-28.
- Description: Abstract: This paper explores the problem of atmospheric turbulence in long range video surveillance. This turbulence causes a phenomenon called heat scintillation or heat shimmer which introduces distortions into the video being captured. The nature of these distortions is discussed and a number of possible solutions explored.
- Full Text:
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