Vincy Salam

Shilpa Sreekumar, Vincy Salam

The advanced RDH work focuses on both data encryption and image encryption which makes it more secure and free of errors. All previous methods embed data without encrypting the data which may subject to errors on the data extraction or image recovery. The proposed work provides a novel RDH scheme in which both data and image can be encrypted and extracted reversibly without any errors. In the proposed work, data extraction and image recovery are free of any errors. The PSNR is significantly improved in the proposed work. This advanced work also performs data hiding in videos.

Archana Vijayan, Vincy Salam

Preserving accuracy is a challenging issue in super resolution images. In this paper, we propose a new FFT based image registration algorithm and a sparse based super resolution algorithm to improve the accuracy of super resolution image. Given a low resolution image, our approach initially extracts the local descriptors from the input and then the local descriptors from the whole correlated images using the SIFT algorithm. Once this is completed, it will compare the local descriptors on the basis of a threshold value. The retrieved images could be having different focal length, illumination, inclination and size. To overcome the above differences of the retrieved images, we propose a new FFT based image registration algorithm. After the registration stage, we apply a sparse based super resolution on the images for recreating images with better resolution compared to the input. Based on the PSSNR calculation and SSIM comparison, we can see that the new methodology creates a better image than the traditional methods.