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Fuzzy colour image and video enhancement

Fuzzy colour image and video enhancement / Ooi Hui Lee
Secara umum, imej dan video sering digunakan dalam kehidupan seharian kita. Namun, salah satu masalah yang sering dihadapi adalah kewujudan kontras yang tidak sekata dalam media digital tersebut. Sesetengah kawasan imej menghadapi pendedahan cahaya yang keterlaluan dan kelihatan berada dalam tahap kecerahan terlampau manakala kawasan lain mengalami masalah kekurangan pendedahan cahaya. Isu ini yang disebabkan oleh faktor-faktor persekitaran kadang kala tidak dapat dielakkan. Teknik fuzi diaplikasikan dalam kajian ini kerana potensi dan kecekapan pemprosesannya yang menyerupai tafsiran dan penaakulan manusia. Satu teknik pembaikan imej dan video warna yang baru dalam keadaan iluminasi cahaya yang tidak seragam dengan penggunaan konsep fuzi dicadangkan. Implimentasi teknik cadangan kemudiannya dibandingkan dengan teknik pembaikan yang sedia ada bagi menentukan keberkesanan algoritma yang dicadangkan. Bagi penilaian prestasi algoritma, keputusan kualitatif dan kuantitatif telah diambil untuk menyokong dapatan kajian. Satu ciri utama kaedah cadangan ini ialah kebolehannya melakukan langkah-langkah pembaikan mengikut tahap pendedahan cahaya dalam imej asal. Keputusan telah membuktikan bahawa algoritma cadangan adalah paling efektif berbanding dengan teknik-teknik sedia ada dalam keupayaan pemeliharaan kontras asal imej warna dalam keadaan pencahayaan yang kurang sempurna. _______________________________________________________________________________________________________ Despite the prevalence of images and video in our daily lives, one of the commonly encountered problems is the presence of uneven contrast in such digital media. Some regions of the image experienced overexposure and appeared to be having an excessively high level of brightness while other areas seemed to be in underexposure. Such predicaments are caused by environmental factors and are sometimes inevitable. Fuzzy technique is applied in this study due to its potential and efficiency of representation and processing that mimics human reasoning. A novel enhancement algorithm for colour image and video under non-uniform illumination condition with the use of fuzzy concept is proposed. Implementation of the proposed technique is compared with several existing state-of-the-art enhancement techniques to assess the effectiveness of the algorithm. For performance evaluation of the proposed algorithm, results for both the qualitative and quantitative analysis are shown to support the findings of the study. A key feature of the proposed method is its ability in performing enhancement procedural steps according to the regional exposure of the original image. Results have proven that the proposed algorithm as the most effective approach, as compared with other existing technique in terms of preserving image contrast in colour fidelity under imperfect lighting.
Contributor(s):
Ooi Hui Lee - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003096350
Accession Number : 875004740
Language:
English
Subject Keywords:
images; video; Fuzzy technique
First presented to the public:
6/1/2012
Original Publication Date:
3/14/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 107
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-14 14:58:35.088
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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