Khalid A. Al-Afandy
Menoufia University
SteganographyImage (mathematics)Support vector machineCPU timeCroppingMatrix (mathematics)Color imageDigital watermarkingArtificial intelligenceHomomorphic encryptionWatermarkPattern recognitionImage resolutionDiscrete cosine transformSingular value decompositionInvestment (macroeconomics)Remote sensing (archaeology)Cover (telecommunications)Information hidingComputer visionMathematicsColor modelVisualizationComputer securityComputer scienceEmbeddingMatrix decompositionLeast significant bitDiscrete wavelet transformRemote sensingStationary wavelet transformRGB color modelRobustness (computer science)
9Publications
5H-index
49Citations
Publications 9
Newest
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#1Khalid A. Al-Afandy (Menoufia University)H-Index: 5
#2Walid El-Shafai (Menoufia University)H-Index: 11
Last. M. M. El-Halawany (Menoufia University)H-Index: 6
view all 9 authors...
Digital watermarking is an efficient and promising mechanism for protecting the copyright of the transmitted multimedia information. Thus, this paper presents two robust hybrid color image watermarking techniques. The objective of the proposed watermarking techniques is to increase the immunity of the watermarked color images against attacks and to achieve adequate perceptual quality. The first proposed hybrid technique is the homomorphic transform based Singular Value Decomposition (SVD) in Dis...
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#1V. Vijaya KumarH-Index: 11
#2Ashraf AboshoshaH-Index: 5
Last. Ahmed M. ShehataH-Index: 3
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#1Khalid A. Al-Afandy (Menoufia University)H-Index: 5
#2Osama S. Faragallah (Menoufia University)H-Index: 16
Last. Ahmed Elmhalawy (Menoufia University)H-Index: 3
view all 5 authors...
This paper proposes a hybrid robust image watermarking scheme based on three levels of Discrete Stationary Wavelet Transform (DSWT) in the Discrete Cosine Transform (DCT) domain. The host image colors (red, green and blue) are separated, and then the DCT is applied on each color after separation. The DSWT is utilized to divide the DCT output into four sub-bands (3 levels). These sub-bands are (A, H, V, D) matrices with the same image size. The watermark is embedded on matrix A. The results of th...
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#1Khalid A. Al-Afandy (Menoufia University)H-Index: 5
#2Osama S. Faragallah (Menoufia University)H-Index: 16
Last. Gh. M. El-Banby (Menoufia University)H-Index: 4
view all 5 authors...
A high security data hiding approach using image cropping and Least Significant Bit (LSB) steganography is proposed. The predefined certain secret coordinate crops are extracted from the cover image. The secret text message is divided into parts with the same image crops. Each part of the secret text message is embedded into an image crop with secret sequence using LSB approach. The embedding is done using the cover image of three color channels. The stego image is given by reassembling the imag...
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#1Khalid A. Al-Afandy (Menoufia University)H-Index: 5
#2Osama S. Faragallah (Menoufia University)H-Index: 16
Last. Ahmed Elmhalawy (Menoufia University)H-Index: 3
view all 5 authors...
This paper proposes a robust image watermarking approach using homomorphic based SVD in the DWT domain. The DWT is utilized to divide the host image into non-overlapping bands. The reflectance component of sub-band LL is extracted using homomorphic transform for each color (red, green and blue). The embedding watermark is done by applying SVD on the reflectance component of the sub-band LL. The results of the proposed watermarking approach are compared with those of the other traditional approac...
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