Enhancement of Pixel Value Ordering Based Data Hiding by Row Block Partition

Abstract

The development of information and communication technology that support digital data transmission such as text, image, audio and video gives several effects. One of them is data security that becomes the main priority during the transmission process. Pixel-Value-Ordering (PVO) which one of data hiding methods can be implemented to achieve the requirement. It embeds data on maximum pixel and minimum pixel in a blok which is a part of the carrier image. However, PVO has capacity a problem, that only 2 bits per block can be hidden. To handle this problem, we propose a new approach by dividing blocks dinamically based on its complexity. These blocks are grouped into 4: smooth block, semi-smooth block, normal block and rough block. Using this approach, the stego capacity can be improved up to 2.6 times in average of previous method by keeping the quality stego more than 65 dB for all testing image.

Image Steganography Technique by Using MSUSAN Algorithm

“…MSUSAN operator Web Site: https://jutq.utq.edu.iq/index.php/main Email: utj@utq.edu.iq uses 3×3 sliding window which are convoluted in non_overlapping manner on the cover image to obtain MSUSAN image. The center of block (nucleus) is compared with the neighbors around it, using equation (1) with threshold value t=20. The number of neighbor pixels having similar intensity value to the nucleus is determined by n using equation 2.…”

“…Information security has become very important in communication technology to transmit different data such as video, audio, text and image safely [1]. The protection of the secret data against illegal person has been necessary while transmitting it over network.…”