Performance comparison of alu's for binary image authentication

摘要

The paper presents a comparison between 8-bit, 16-bit and 32-bit ALUs which are designed to perform the data hiding operation for the authentication of binary images. This paper compares the area, delay and power consumption of each ALU. The data hiding is done in such a way that the connectivity of the image is preserved and hence the image quality will be retained. . The watermarking can be done on those pixels which are identified as "flippable" and "embeddable". The "flippability" of a pixel is determined by imposing three transition criteria in a 3x3 moving window centred at the pixel. A "key" is introduced, in order to ensure the authenticity and integrity of the binary image. All the designed ALUs are capable of performing data hiding operation on any image of any bit size. The 16 bit ALU and the 32 bit ALU were compared with the one which is designed to perform the task, by the parallel processing of 8 bit ALUs. The aim of the paper is to prove that lower bits ALUs exhibits better performance, when compared to higher bit ALUs. The coding is written in verilog language and the results are taken from cadence software.