کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
744523 894390 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Color information security system using discrete cosine transform in gyrator transform domain radial-Hilbert phase encoding
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Color information security system using discrete cosine transform in gyrator transform domain radial-Hilbert phase encoding
چکیده انگلیسی

A novel color-information encryption technique based on discrete cosine transform and radial Hilbert phase mask in gyrator transform domain is proposed. In this work, the radial Hilbert phase function is employed as selected phase mask. Before the encryption, the original color image is converted into independent channels, i.e. red, green, and blue. Each channel is encrypted using first random phase mask and discrete cosine transform at input plane, and then the first gyrator transform is executed. The obtained image is again encrypted using second random phase mask and discrete cosine transform at frequency plane, and then transmitted through radial Hibert phase mask. The gyrator transform is performed on the transmitted image. The integral orders of radial Hibert phase mask and transformation angles of gyrator transform in each channel provide supplementary keys to enhance the security. The proposed system evades the misalignment problems. Numerical simulations are demonstrated to test the security, validity, and efficiency of the proposed algorithm.


► DCT and radial-Hilbert phase mask in gyrator transform domain is proposed for encrypting an image.
► The parameters of radial-Hilbert phase mask and gyrator transform in each channel are main keys.
► The optical implementation of the color-image encryption technique has been presented.
► The security system avoids problems arising from misalignment.
► Numerical simulations are performed to demonstrate the feasibility of the scheme.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 50, Issue 9, September 2012, Pages 1209–1216
نویسندگان
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