پديد آورنده :
اميري، مهدي
عنوان :
بررسي و مقايسه روشهاي پنهان‌شكني در تصاوير ديجيتال و معرفي راهكارهاي جديد
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
دوازده، ۷۱ص.: مصور، جدول، نمودار
استاد راهنما :
مسعود عمومي
توصيفگر ها :
پنهان‌نگاري , پنهان‌شكني , مجموعه ويژگي , تبديل موجك
استاد داور :
شادرخ سماوي، نادر كريمي
تاريخ ورود اطلاعات :
1396/09/14
رشته تحصيلي :
برق و كامپيوتر
دانشكده :
مهندسي برق و كامپيوتر
چكيده انگليسي :
Investigation and Comparison of Steganalysis Methods in Digital Images by Introducing New Approaches Mehdi Amiri Mehdi amiri@ec iut ac ir Data of Submission 2017 06 18 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan Iran 84156 83111Degree Master of Science Language PersianSupervisors Dr masoud omoomi omoomi@cc iut ac irAbstractBy developing connections and increasing the use of the internet in today s world thenecessity of secure connections as well as the assurance of inaccessibility of precious datais increasingly important In this respect studies on the science of data hiding have beenwidely done In general data security systems are classified into encryption and datahiding categories One of the main branches of data hiding is steganography which its mainpurpose is hiding the existence of data from enemy or other users Steganography is usedin different media such as images texts videos and voices However improvingsteganalysis methods is essential for evaluating and applicability of steganographymethods and preventing illegal uses To achieve this aim first the previous methods ofsteganography and steganalysis should be studied Then given the changes that are madein the stego steganalysis algorithms are expressed In the present study generalexplanations about the steganalysis algorithms in different areas are presented In addition it is tried to provide general information about the algorithms Furthermore according tothe previous studies it is attempted to present an improvement to their result s methods Inorder to make feature set discrete wavelet transform is used for considering all images Since the dimensions of feature set increase and the classification is done in a long time inorder to decrease the dimension of feature set LDA algorithm is used in the study Resultsshowed that this algorithm had a great impact on the feature set That is it decreased thedimension and increased the precision of recognition Keywords Steganography Steganalysis Feature set Wavelet transform
استاد راهنما :
مسعود عمومي
استاد داور :
شادرخ سماوي، نادر كريمي
