Image enhancement has an important role in image processing applications. Contrast
limited adaptive histogram equalisation (CLAHE) is an effective algorithm to enhance the …

This paper suggests a sparse watermark image embedding scheme on the singular values
of the pre-selected wavelet sub-band coefficients of the digital images. Dictionary learning …

This paper proposes a tamper detection and correction technique using semi-fragile data
hiding that aims to achieve high perceptual quality of images at the user-end even after …

Digital watermarking has an important application to protect and authenticate the medical
images. To perform accordingly one of the most commonly used methods is region based …

This paper investigates the scope of wavelets for performance improvement in spread
spectrum image watermarking. Performance of a digital image watermarking algorithm, in …

Transmission of digital data through radio mobile channel experiences fading effect that
leads to severe degradation in quality. Error concealment is a postprocessing technique to …

This paper proposes a scheme for quality access control of discrete cosine transform (DCT)
based compressed color image (s) using data hiding. The goal of access control is achieved …

Transmission of block-coded images through error-prone radio mobile channel often results
in lost blocks. Error concealment (EC) techniques exploit inherent redundancy and reduce …

This paper proposes a tamper detection and correction scheme using semi-fragile data
hiding that aims to achieve high perceptual quality of images at the end-user even after …

This paper presents an adaptive and robust invisible watermarking method for digital
images. The proposed method is carried out into four phases. In the first phase, Scale …