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Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study
Endoscopy is a critical application that requires adaptable illumination to adjust to varying imaging conditions. Automatic brightness control (ABC) algorithms ensure optimal brightness throughout the image with rapid but smooth response and render the true colours of the biological tissue under exa...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223240/ https://www.ncbi.nlm.nih.gov/pubmed/37430846 http://dx.doi.org/10.3390/s23104932 |
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author | Ravichandran, Nishitha Sreelatha Premkumar, Preejith Sivaprakasam, Mohanasankar |
author_facet | Ravichandran, Nishitha Sreelatha Premkumar, Preejith Sivaprakasam, Mohanasankar |
author_sort | Ravichandran, Nishitha |
collection | PubMed |
description | Endoscopy is a critical application that requires adaptable illumination to adjust to varying imaging conditions. Automatic brightness control (ABC) algorithms ensure optimal brightness throughout the image with rapid but smooth response and render the true colours of the biological tissue under examination. To achieve good image quality, high-quality ABC algorithms are necessary. In this study, we propose a three-assessment method approach for objectively evaluating ABC algorithms based on (1) image brightness and its homogeneity, (2) controller response and response time, and (3) colour rendition. We conducted an experimental study to assess the effectiveness of ABC algorithms in one commercial and two developmental endoscopy systems using the proposed methods. The results showed that the commercial system achieved good, homogeneous brightness within 0.4 s, and its damping ratio was 0.597, indicating a stable system, but its colour rendition was suboptimal. The developmental systems had control parameter values that resulted in either a sluggish response (over 1 s) or a fast (about 0.3 ms) but unstable response with damping ratios above 1, causing flickers. Our findings indicate that the interdependency among the proposed methods can establish tradeoffs in the overall ABC performance better than single-parameter approaches. The study establishes that comprehensive assessments using the proposed methods can contribute to designing new ABC algorithms and optimising already implemented ones for efficient performance in endoscopy systems. |
format | Online Article Text |
id | pubmed-10223240 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102232402023-05-28 Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study Ravichandran, Nishitha Sreelatha Premkumar, Preejith Sivaprakasam, Mohanasankar Sensors (Basel) Article Endoscopy is a critical application that requires adaptable illumination to adjust to varying imaging conditions. Automatic brightness control (ABC) algorithms ensure optimal brightness throughout the image with rapid but smooth response and render the true colours of the biological tissue under examination. To achieve good image quality, high-quality ABC algorithms are necessary. In this study, we propose a three-assessment method approach for objectively evaluating ABC algorithms based on (1) image brightness and its homogeneity, (2) controller response and response time, and (3) colour rendition. We conducted an experimental study to assess the effectiveness of ABC algorithms in one commercial and two developmental endoscopy systems using the proposed methods. The results showed that the commercial system achieved good, homogeneous brightness within 0.4 s, and its damping ratio was 0.597, indicating a stable system, but its colour rendition was suboptimal. The developmental systems had control parameter values that resulted in either a sluggish response (over 1 s) or a fast (about 0.3 ms) but unstable response with damping ratios above 1, causing flickers. Our findings indicate that the interdependency among the proposed methods can establish tradeoffs in the overall ABC performance better than single-parameter approaches. The study establishes that comprehensive assessments using the proposed methods can contribute to designing new ABC algorithms and optimising already implemented ones for efficient performance in endoscopy systems. MDPI 2023-05-20 /pmc/articles/PMC10223240/ /pubmed/37430846 http://dx.doi.org/10.3390/s23104932 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ravichandran, Nishitha Sreelatha Premkumar, Preejith Sivaprakasam, Mohanasankar Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title | Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title_full | Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title_fullStr | Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title_full_unstemmed | Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title_short | Methodological Considerations for Assessing Automatic Brightness Control in Endoscopy: Experimental Study |
title_sort | methodological considerations for assessing automatic brightness control in endoscopy: experimental study |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223240/ https://www.ncbi.nlm.nih.gov/pubmed/37430846 http://dx.doi.org/10.3390/s23104932 |
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