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روش ترکیبی مکانی فرکانسی در حذف نویز ضربه و بهبود کیفیت تصویر | ||
پردازش سیگنال پیشرفته | ||
مقاله 5، دوره 2، شماره 1 - شماره پیاپی 2، شهریور 1396، صفحه 33-44 اصل مقاله (2.08 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jasp.2017.5698 | ||
نویسندگان | ||
محمد مؤمنی1؛ مهدی نوشیار* 2 | ||
1دانشگاه یزد - دانشکده مهندسی کامپیوتر | ||
2دانشگاه محقق اردبیلی - دانشکده فنی و مهندسی | ||
چکیده | ||
نویز ضربه یکی از عوامل تضعیف کیفیت در تصاویر دیجیتال است. در این مقاله با استفاده از یک روش ترکیبی ابتکاری نویز حذف میشود و کیفیت تصویر بهبود مییابد. الگوریتم پیشنهادی از دو مرحله تشخیص و حذف نویز ضربه در حوزه مکان و بهبود کیفیت تصویر در حوزه فرکانس تشکیل یافته است. معرفی معیاری برای سنجش میزان تخریب در مقیاس پیکسل و کل تصویر نوآوری دیگر این مقاله است. اساس این معیار، به دست آوردن نسبت تعداد پیکسلهای نویزی احتمالی به پیکسلهای با مقدار واقعی است. در بخش سنجش کیفیت تصاویر بازیابی شده از معیار PSNR و MSSIM استفاده شده است. نتایج شبیهسازی الگوریتم پیشنهادی بر روی تصاویر استاندارد با شدت نویزهای مختلف نشان میدهد که روش ارائهشده در مقایسه با روشهای موجود عملکرد بهتری دارد و بهطور متوسط افزایش مقدار PSNR بیش از 2dB در قیاس با آخرین پژوهشهای مرتبط ملاحظه میشود. | ||
کلیدواژهها | ||
نویز ضربه؛ حذف نویز؛ فیلتر مکانی- فرکانسی | ||
مراجع | ||
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