A robust DCT-2DLDA watermark for color images

Chang, Te-Min; Pan, I-Hui; Huang, Ping; Hu, Chenhao

doi:10.1007/s11042-018-6505-4

Cited by 20 publications

(17 citation statements)

References 31 publications

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“…To embed the watermark on the LL2 sub-band, the middle coefficient values are created (rather than changing the image coefficient directly), and discrete cosine transform (DCT) is applied to it. The DCT mainly calculates the weighted coefficient resulting from Fourier transform [ 50 ]. The DCT transform identifies the direct coefficient (DC) component of an image and the major definition of an image is originated from the DC component.…”

Section: Proposed Schemementioning

confidence: 99%

Encryption Based Image Watermarking Algorithm in 2DWT-DCT Domains

Hasan

Islam

Chen

et al. 2021

Sensors

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This paper proposes an encryption-based image watermarking scheme using a combination of second-level discrete wavelet transform (2DWT) and discrete cosine transform (DCT) with an auto extraction feature. The 2DWT has been selected based on the analysis of the trade-off between imperceptibility of the watermark and embedding capacity at various levels of decomposition. DCT operation is applied to the selected area to gather the image coefficients into a single vector using a zig-zig operation. We have utilized the same random bit sequence as the watermark and seed for the embedding zone coefficient. The quality of the reconstructed image was measured according to bit correction rate, peak signal-to-noise ratio (PSNR), and similarity index. Experimental results demonstrated that the proposed scheme is highly robust under different types of image-processing attacks. Several image attacks, e.g., JPEG compression, filtering, noise addition, cropping, sharpening, and bit-plane removal, were examined on watermarked images, and the results of our proposed method outstripped existing methods, especially in terms of the bit correction ratio (100%), which is a measure of bit restoration. The results were also highly satisfactory in terms of the quality of the reconstructed image, which demonstrated high imperceptibility in terms of peak signal-to-noise ratio (PSNR ≥ 40 dB) and structural similarity (SSIM ≥ 0.9) under different image attacks.

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Section: Proposed Schemementioning

confidence: 99%

Encryption Based Image Watermarking Algorithm in 2DWT-DCT Domains

Hasan

Islam

Chen

et al. 2021

Sensors

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“… [ 8 ] To improve the watermarked image’s integrity and perceived quality and to enhance the security of watermarking DWT, SVD, Quantization, Shore, Lena, Baboon, Pepper, Dark cloud: 200 × 200 PSNR, Bit error rate (BER) JPEG compression, Gaussian noise, Median filter, Cropping The enhanced perceptual quality of the watermarked images and the proposed scheme preserve high PSNR. [ 10 ] The proposed method uses 2-D Linear Discriminant Analysis (2DLDA) watermark scheme for copyright protection 2-D linear discriminant analysis (2DLDA), Discrete cosine transform (DCT) Host image: e 512 × 512, where each pixel is represented by 24 bits in the RGB color space; watermark of a recognizable pattern of size 32 × 25 PSNR, Bit error rate (BER) Cropping, Blurring, Mosaic, Luminance and contrast adjustment, JPEG Experimental results demonstrate that the differences between the watermarked and original images are indistinguishable. The proposed method effectively resists standard image processing attacks.…”

Section: Introductionmentioning

confidence: 99%

Robust, imperceptible and optimized watermarking of DICOM image using Schur decomposition, LWT-DCT-SVD and its authentication using SURF

Awasthi

Srivastava

2022

Multimed Tools Appl

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In this proposed work, a dual image watermarking algorithm is used to protect the data against copyright violations. In this work, the DICOM image is used as a host image. Two watermark images used are the MNNIT logo and the personal data of the patient. This method utilizes the advantages of Schur decomposition, lifting wavelet transform (LWT), discrete cosine transform (DCT) and singular value decomposition (SVD). The scaling factor is a vital parameter of watermarking technique. The firefly optimization technique is used to get the optimized scaling factor. The Speeded-up robust features (SURF) are used for watermarking authentication. To evaluate the performance of the proposed algorithm, peak signal-to-noise ratio (PSNR), normalized correlation coefficient (NCC), and structural similarity index measurement (SSIM) are used. The proposed method is tested against various attacks such as Salt and Pepper noise, Gaussian noise, Gaussian low pass filter, Average filter, Median filter, Histogram equalization, Sharpening, Rotation and Region of interest filtering. The proposed algorithm shows a high level of robustness and imperceptibility. It is found that the features of the input host image and the watermarked image are matching correctly on applying the SURF technique.

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“…Relational directories are utilized as well as discussed thoroughly as a result of the growing usage on the Internet and also cloud computing. Nevertheless, the amazing rise in the development, sharing and transfer of directories at the same time incurs protection consequences, like information theft, unlawful copying as well as copyright violation [9]. Thus information protection difficulties are becoming more and more visible.…”

Section: Introductionmentioning

confidence: 99%

Database Security with Fingerprint Masking

RM¹

2022

IJRASET

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Information in numerous areas including medication, business, and science wasso crucial, in which directories are utilized efficiently for information sharing.Nevertheless, the directories confront the danger to be pirated, taken or even misused, which might lead to many of protection risks regarding ownership rights, informationtampering as well as secrecy safeguards. Watermarking is the technology which is used to secure the database from the various attacks.It is also used to hide the content from the un authorized users. The majority of state-of-the- art techniques alter the initial information to a big level, lead to information quality wreckage,and then can't attain balance that is good between robustness from malicious strikes as well as information restoration. we suggest a reversible and robust watermarking method with Genetic Algorithm and Histogram ShiftingWatermarking (GAHSW) to relation the numerical data. This algorithm used to get the unique key for the database as well as the watermarked place. Experimental evaluation show the usefulness and methods within theterminology of robustness from malicious strikes as well as upkeep of information quality.We have achieved the security level on comparing with existing system

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A robust DCT-2DLDA watermark for color images

Cited by 20 publications

References 31 publications

Encryption Based Image Watermarking Algorithm in 2DWT-DCT Domains

Encryption Based Image Watermarking Algorithm in 2DWT-DCT Domains

Robust, imperceptible and optimized watermarking of DICOM image using Schur decomposition, LWT-DCT-SVD and its authentication using SURF

Database Security with Fingerprint Masking

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