Watermarking for no-refrence video quality

مقدم أطروحة جامعية

al-Ubaydi, Wafa Mahdi Salih Sallum

مشرف أطروحة جامعية

Sadiq, Ahmad T.

الجامعة

الجامعة التكنولوجية

الكلية

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القسم الأكاديمي

قسم علوم الحاسوب

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2012

الملخص الإنجليزي

This thesis presents a no-reference video quality metric that blindly estimates the quality of a video.

The proposed system makes use of a data hiding technique to embed a fragile mark into some areas of the video frame.

To evaluate video quality at the receiver, the mark is extracted from these areas of the received video.

The proposed system is based on video watermarking, using 8x8 blocks DCT coefficients for YCBCR domain, and for watermark generation; the Geffe generator has been used to generate binary stream sequence watermark in embedding and extracting processor.

Data hiding is achieved by simple “even-odd” signaling of the DCT coefficients.

The comparison process between the extracted watermark and the generated watermark from Geffe generator has been be calculated to conclude the video quality assessment by measuring the watermark degradation.

An identical watermark within each frame has been used in this thesis.

With these mechanisms, the proposed method is robust against the attacks of frame dropping, averaging, swapping, and statistical analysis.

The proposed system methods of embedding and extracting are implemented using MATLAB ver.

7.12.0.635 (R2011a) 64-bit.

The results indicate that the proposed video quality metric outperforms standard Peak Signal to Noise Ratio (PSNR) and Structural SIMilarity and Image Quality (SSIM) metric in estimating the perceived quality of a video.

The results demonstrate that the proposed system survives video distortions, such as additive Gaussian noise and that the error rate is approximately 0.023 comparing with that of standard metrics like PSNR and SSIM.

التخصصات الرئيسية

تكنولوجيا المعلومات وعلم الحاسوب

الموضوعات

• الإلكترونيات الرقمية
• الفيديو الرقمي

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-419246