نهاننگاری یکی از حوزههای پرکاربرد مخفی‌سازی اطلاعات است که به جاسازی غیرمحسوس پیام محرمانه داخل یک پوشانه میپردازد. در این مقاله یک روش بهبودیافته برای جاسازی پیام محرمانه داخل پوشانه تصویر در حوزه مکان، براساس نظریه کدگذاری معرفی میکنیم، به‌طوری‌که فرستنده پیام محرمانه را با توجه به ماتریس کنترل مشابهت (H) کد توافقی با گیرنده، در پوشانه با کمترین تغییر جاسازی نموده و آن را برای گیرنده ارسال میکند. حال گیرنده تنها با همان ماتریس توافقی بهراحتی میتواند پیام را از پوشانه استخراج کند. در این روش جدید، ضمن برخورداری از مزایای حوزه مکان و تشخیص و تصحیح خطای رشته بیت دریافتی توسط گیرنده، میتوان مقاومت را بین 94 % الی 100 %، شفافیت (PSNR) را تا 71/84 % و مشابهت (SSIM) را تا 99/9999 % افزایش داد.
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