A Visual Enhancement Quality of Digital Medical Image Based on Bat Optimization

Hussin, Kholood N.; Nahar, Ali Kareem; Khleaf, Hussain Kareem

doi:10.30684/etj.v39i10.2165

Cited by 3 publications

(3 citation statements)

References 20 publications

(22 reference statements)

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“…The peak signal-to-noise ratio (PSNR) measure is used between the watermarked and the unwatermarked images. It is related to imperceptibility, where a higher PSNR means a higher imperceptibility [29].…”

Section: Performance Evaluation 41 Performance Measuresmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid Watermarking and Encryption Techniques for Securing Medical Images

Alhussan¹,

Abdallah²,

Alsodairi³

et al. 2023

Computer Systems Science and Engineering

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Securing medical data while transmission on the network is required because it is sensitive and life-dependent data. Many methods are used for protection, such as Steganography, Digital Signature, Cryptography, and Watermarking. This paper introduces a novel robust algorithm that combines discrete wavelet transform (DWT), discrete cosine transform (DCT), and singular value decomposition (SVD) digital image-watermarking algorithms. The host image is decomposed using a two-dimensional DWT (2D-DWT) to approximate low-frequency sub-bands in the embedding process. Then the sub-band low-high (LH) is decomposed using 2D-DWT to four new sub-bands. The resulting sub-band low-high (LH 1 ) is decomposed using 2D-DWT to four new sub-bands. Two frequency bands, high-high (HH 2 ) and high-low (HL 2 ), are transformed by DCT, and then the SVD is applied to the DCT coefficients. The strongest modified singular values (SVs) vary very little for most attacks, which is an important property of SVD watermarking. The two watermark images are encrypted using two layers of encryption, circular and chaotic encryption techniques, to increase security. The first encrypted watermark is embedded in the S component of the DCT components of the HL2 coefficients. The second encrypted watermark is embedded in the S component of the DCT components of the HH 2 coefficients. The suggested technique has been tested against various attacks and proven to provide excellent stability and imperceptibility results.

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Section: Performance Evaluation 41 Performance Measuresmentioning

confidence: 99%

“…A correlation coefficient measure is used between the extracted and the original watermarks, where a higher correlation coefficient means that the extracted watermark is the one of interest. This measure is calculated as follows [29].…”

Section: Performance Evaluation 41 Performance Measuresmentioning

confidence: 99%

Hybrid Watermarking and Encryption Techniques for Securing Medical Images

Alhussan¹,

Abdallah²,

Alsodairi³

et al. 2023

Computer Systems Science and Engineering

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“…The Bat must be used by three principles: To begin started, all bats utilize the echolocation in order to measure their distance from a given spot. Second, bats fly in a predetermined direction at a predetermined speed at irregular intervals with a fixed frequency [43]. The volume and wavelength, however, can change.…”

Section: A Optimal Backstepping Control Parametersmentioning

confidence: 99%

A Comparative Study Between Convolution and Optimal Backstepping Controller for Single Arm Pneumatic Artificial Muscles

Ahmed

Kadhim

2022

Journal of Robotics and Control

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This study was based on the dynamic modeling and parameter characterization of the one-link robot arm driven by pneumatic artificial muscles. This work discusses an up-to-date control design based on the notion of a conventional and optimal backstepping controller for regulating a one-link robot arm with conflicting biceps and triceps positions supplied by pneumatic artificial muscles. The main problems found in systems that utilize pneumatic artificial muscle as actuators are primarily the large uncertainties, non-linearities, and time-varying features that severely impede movement performance in tracking control. In consideration of the uncertainty, high nonlinearity, and external disturbances that can exist during the motion. Lyapunov-based backstepping control technique was utilized to assure the stability of the system with improved dynamic performance. The bat algorithm optimization method is utilized in order to modify the variables used in the design of the controller to enhance the efficiency of the suggested controller. According to the conclusions, a quantitative comparison of the response in the PAM actuated the arm model in the current study and earlier investigations with the Backstepping controlled system revealed fair agreement with a variation of 37.5% from the optimal classical synergetic controller. In addition, computer simulations were utilized in order to compare the effectiveness of the proposed conventional controls and the optimal background. It has been proven that an optimal controller can control the uncertainties and maintain the controlled system’s stability.

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