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Thanki, Rohit M.
- Experimental Study of Sparse Watermarking Techniques for Multibiometric System
Abstract Views :206 |
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Authors
Affiliations
1 C U Shah University, Wadhwan City, Gujarat, IN
2 EC Department, Atmiya Institute of Technology & Science, Rajkot, Gujarat, IN
1 C U Shah University, Wadhwan City, Gujarat, IN
2 EC Department, Atmiya Institute of Technology & Science, Rajkot, Gujarat, IN
Source
Indian Journal of Science and Technology, Vol 8, No 1 (2015), Pagination: 42-48Abstract
This paper focus on study and analysis of effect of watermarking technique in spatial domain combined with cs theory on verification and authentication performance of multibiometric system. In presented techniques, watermark fingerprint is compressed using CS theory before embedding into host biometric. These compressed fingerprint features embed into face image such that watermarked face image is used for verification and authentication of individual. Compressed fingerprint features are used for cross verification and authentication of individual. The modified LSB substitution based technique and modified correlation based technique using WGN combined with CS theory used to secure biometric data at system database and communication channel between two checkpoints of multibiometric system, respectively. The verification accuracy of multibiometric system using these watermarking techniques is around 96 % with more computational security and high perceptual quality of biometric data. The results show that these watermarking techniques do not have effect on authentication performance of multibiometric system. The novelty of paper is combined compressive sensing theory with watermarking technique for security of multibiometric data.Keywords
Biometric Data, CS Theory, Multibiometric System, Watermarking.- Performance Analysis of Transform Domain Watermarking Techniques for Medical Images
Abstract Views :166 |
PDF Views:2
Authors
Affiliations
1 EC Department, Government Polytechnic, Rajkot, Gujarat, IN
2 EC Department, G H Patel College of Engineering & Technology, Vallabh Vidyanagar, Gujarat, IN
3 EC Department, Darshan Institute of Technology & Engineering, Rajkot, Gujarat, IN
1 EC Department, Government Polytechnic, Rajkot, Gujarat, IN
2 EC Department, G H Patel College of Engineering & Technology, Vallabh Vidyanagar, Gujarat, IN
3 EC Department, Darshan Institute of Technology & Engineering, Rajkot, Gujarat, IN
Source
Digital Image Processing, Vol 3, No 11 (2011), Pagination: 654-658Abstract
Because of the importance of the security issues in the management of medical information on internet and provide copyright protection to medical images, we suggest using a watermarking scheme in transform domain which may help medical data protection and authentication. So Digital Watermarking for medical images has recently been explored as it can be used to hide the patient's information and then extract back the same. In this paper, we have implemented and analysed two transform domain watermarking techniques viz. Frequency domain technique for different Mid-Band DCT coefficients and Wavelet domain technique for different noise values have been implemented for medical images likes CT, MRI and Ultrasound and check detector performance of both techniques. The detector performance for both the techniques is quite encouraging, which is indicated from the PSNR and NCC values of above 63 dB and 0.9, respectively for both techniques. However, the results show that the wavelet domain technique performs better than the frequency domain technique in terms of recovery of watermarks.Keywords
Discrete Cosine Transform (DCT), Discrete Wavelet Transform (DWT), Digital Watermark, Medical Images, PSNR, NCC.- Design and Analysis of Operational Transconductance Amplifier (OTA)
Abstract Views :176 |
PDF Views:2
Authors
Affiliations
1 Electronics & Communication Department, Government Polytechnic, Rajkot, Gujarat, IN
1 Electronics & Communication Department, Government Polytechnic, Rajkot, Gujarat, IN
Source
Digital Signal Processing, Vol 3, No 6 (2011), Pagination: 262-267Abstract
Operational Transconductance Amplifier (OTA) is one of the most versatile and important circuit components in the analog and mixed signal circuit design. It is also one of the more complex cells to design. Basically there are many types of op-amp but OTA is different from others because OTA is voltage control current source device. For OTA, input will be voltage at different types and achieved current at output side. The main feature of paper is that it reduces the size of chip decreasing MOS transistor in conventional design of OTA which have 16 and our design reduce MOS transistor up to 10 and it reduce noise up to some extent and try to get good design which has higher output capability. This paper gives analysis of Schematic design and CMOS Layout of OTA for different types of inputs and gets parameter like Gain margin, Phase margin, Slew Rate, CMRR, Transient Time, Noise Spectral Density, PSRR, Power Dissipation and Power Consumption.Keywords
CMOS Layout, Micro Wind OP-AMP, Tanner, Transconductance, Schematic Circuit.- Comparative Analysis of Different Noise Sequence Embedded Color Image Watermarking Techniques in Spatial Domain
Abstract Views :183 |
PDF Views:2
Authors
Affiliations
1 EC Department, Government Polytechnic, Rajkot, Gujarat, IN
2 EC Department, G H Patel College of Engineering & Technology, Vallabh Vidyanagar, Gujarat, IN
3 EC Department, Darshan Institute of Technology & Engineering, Rajkot, Gujarat, IN
1 EC Department, Government Polytechnic, Rajkot, Gujarat, IN
2 EC Department, G H Patel College of Engineering & Technology, Vallabh Vidyanagar, Gujarat, IN
3 EC Department, Darshan Institute of Technology & Engineering, Rajkot, Gujarat, IN