مجله ماشین بینایی و پردازش تصویر

مجله ماشین بینایی و پردازش تصویر

ارائه روش ساده و کارآمد برای بهبود کیفیت تصاویر زیرآب با استفاده از تصحیح نور و رنگ و مدل‌های محو زدایی حوزه مکان

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشکده فنی، گروه مهندسی برق، دانشگاه گیلان
چکیده
تصاویر ثبت‌شده در محیط‌های زیرآب به دلیل پدیده‌های فیزیکی مانند جذب و پراکندگی نور، با تخریب هایی نظیر کاهش شدید تمایز، محوشدگی و اعوجاج رنگی روبرو هستند. روش‌های بهبود کیفیت تصاویر زیر آب موجود غالباً در بازیابی همزمان رنگ و تمایز دچار محدودیت بوده و اعمال مستقیم روش‌های محوزدایی بر روی تصاویر رنگی، اغلب به تخریب رنگ یا نوردهی بیش از حد در نواحی روشن منجر می‌شود. در این مقاله، یک رویکرد ترکیبی کارآمد برای بهبود کیفیت تصاویر زیرآب ارائه شد. در این راستا، ابتدا انحرافات رنگی به کمک اصلاح رنگ الهام‌گرفته از الگوی آرایه فیلتر رنگی اصلاح شد. در گام بعد، برای پیشگیری از تخریب رنگ‌ها، الگوریتم محوزدایی کانال تاریک با استفاده از ترکیب مؤلفه‌های اشباع و روشنایی در فضای HSV اعمال شد. در پایان نیز، تمایز و اشباع رنگ با بهره‌گیری از روش‌های تطبیقی مبتنی بر هیستوگرام بهبود یافت. نتایج ارزیابی‌های کیفی و کمّی مبتنی بر معیارهای بدون مرجع و با مرجع نشان داد که روش پیشنهادی، ضمن رفع مشکل اعوجاج و خرابی تصویر، تعادل مناسبی میان بازیابی رنگ طبیعی و افزایش وضوح جزئیات برقرار می سازد.
کلیدواژه‌ها

عنوان مقاله English

A fast and efficient underwater image enhancement method using light and color correction and spatial domain dehazing models

نویسندگان English

Aryan Sahari
Reza PR Hasanzadeh
Department of Electrical Engineering, University of Guilan, Rasht, Iran
چکیده English

Images captured in underwater environments face degradations such as severe contrast reduction, blurriness, and color distortion due to physical phenomena like light absorption and scattering. Existing underwater image enhancement methods are often limited in simultaneous color and contrast restoration, and the direct application of dehazing methods on color images often leads to color degradation or overexposure in bright areas. In this paper, an efficient hybrid approach for underwater image enhancement is presented. In this regard, first, color deviations were corrected using a color correction method inspired by the Color Filter Array (CFA) pattern. In the next step, to prevent color degradation, the Dark Channel Prior (DCP) dehazing algorithm was applied exclusively to the illumination component. Finally, contrast and color saturation were improved utilizing adaptive histogram-based methods. The results of qualitative and quantitative evaluations based on no-reference metrics showed that the proposed method, while resolving the issue of distortion and image degradation, established a proper balance between natural color restoration and increasing detail clarity.

کلیدواژه‌ها English

Underwater image enhancement
Illumination correction
Color restoration
Image detail preservation
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مقالات آماده انتشار، پذیرفته شده
انتشار آنلاین از 27 مهر 1405

  • تاریخ دریافت 26 خرداد 1405
  • تاریخ بازنگری 26 مهر 1405
  • تاریخ پذیرش 26 مهر 1405