Title :
Blind assessment of image quality employing fragile watermarking
Author :
Bhattacharya, Ankan ; Palit, Sarbani ; Chatterjee, Nivedita ; Roy, Gourav
Author_Institution :
Indian Stat. Inst., Kolkata, India
Abstract :
The provision of blind quality assessment is an important requirement for modern multimedia and communication systems. Fragile watermarking techniques have been proposed earlier for this purpose. This paper proposes a novel approach which makes use of both fragile and robust watermarking techniques. The embedded fragile watermark is used to assess the degradation undergone by the transmitted images. Robust image features, on the other hand, are used to construct the reference watermark from the received image, for assessing the amount of degradation of the fragile watermark. Construction of the watermark from the image itself, dispenses with the need for embedding an extraneous watermark which must be made known to the user separately, a significant contribution of the present work in image quality assessment. Another contribution is the use of Singular Value Decomposition (SVD) for the extraction of the fragile watermark. The validity of the proposed approach is verified through extensive simulations using different kinds of gray-scale and color images.
Keywords :
image watermarking; multimedia communication; singular value decomposition; color image; communication systems; embedded fragile watermark; extraneous watermark; fragile watermarking technique; gray scale image; image quality blind assessment; multimedia systems; robust watermarking technique; singular value decomposition; AWGN; Degradation; Image coding; Image edge detection; Quality assessment; Watermarking; Edge detection; fragile watermark; noise; quality assessment; singular value decomposition;
Conference_Titel :
Image and Signal Processing and Analysis (ISPA), 2011 7th International Symposium on
Conference_Location :
Dubrovnik
Print_ISBN :
978-1-4577-0841-1
Electronic_ISBN :
1845-5921