بازسازی تصاویر زیر آب با استفاده از روش ترکیبی فوریه-موجک

نوع مقاله : مقاله پژوهشی

نویسندگان

مجتمع دانشگاهی علوم کاربردی، دانشگاه صنعتی مالک اشتر

چکیده

جذب و پراکندگی نور از سوی مولکول‌های آب یا ذرات معلق موجود در آن از مهم‌ترین عوامل کاهش کیفیت تصاویر تهیه‌شده در زیر آب هستند. همین امر باعث کاهش برد سامانه‌های تصویربردار در زیر آب می‌شود. تاکنون از دو روش واپیچش- موجک و واپیچش فوریه برای بازسازی تصاویرمات و آغشته‌ به نوفۀ تهیه‌شده در زیر آب استفاده‌‌شده است. بااین‌وجود، کیفیت نتیجۀ حاصل از هردوی این روش‌ها بسیار حساس به نوفه است. روش ترکیبی واپیچش فوریه-موجک روش پردازش تصویری است که در آن به‌طور هم‌زمان از مزایای هر دو روش واپیچش-موجک و واپیچش فوریه به‌منظور بهبود کیفیت تصاویر استفاده می‌شود. در این مقاله از روش ترکیبی واپیچش فوریه-موجک برای بازسازی تصاویرشبیه‌سازی‌شده در زیر آب استفاده‌‌‌شده است. نتایج شبیه‌سازی‌ها نشان‌گر قابلیت مناسب این روش ترکیبی برای بازسازی تصاویر زیر آب در مقایسه با هریک از روش‌های واپیچش- موجک و واپیچش فوریه به‌تنهایی است.

کلیدواژه‌ها

عنوان مقاله [English]

Underwater Optical Images Restoration using Hybrid Fourier-Wavelet Method

نویسندگان [English]

  • lale rahiminezhad
  • sayed ali asghar askari
Assistant professor, Malek-Ashtar university of technology
چکیده [English]

Absorption and scattering of light from water, and also in-water particles, are two main factors which impose the blurring and noise on captured images from underwater objects. In this manner, the working range of underwater optical imaging (UOI) systems is limited by these phenomena. Wavelet de-noised deconvolution and Fourier regularized deconvolution are two well-known software methods which have already been used for restoring the blurred-noisy underwater images. Nevertheless, the results of both of these software methods are very noise sensitive. Hybrid Fourier wavelet deconvolution is another image processing method which simultaneously benefits from the advantages of both wavelet de-noised deconvolution and Fourier regularized deconvolution techniques. In this paper, we propose to employ the hybrid Fourier wavelet method for underwater images restoration. Computer simulations show the superior performance of this technique to utilize in the UOI systems in comparison with the previously used wavelet de-noised deconvolution and Fourier regularized deconvolution methods.

کلیدواژه‌ها [English]

  • Underwater imaging
  • Wavelet deconvolution
  • Fourier deconvolution
  • Fourier wavelet deconvolution

مراجع

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