Steganography: Hiding Half Tone Images

Abstract

Basically half tone technique is used in Printing technology. The fundamental principle of half tone technique is to convert 8-bit pixel representation to 1-bit using half tone operators. This 1-bit gives wide scope to hide half tone image in an image. The performance of proposed Small half tone operator is compared with standard Floyd-Steinberg. Experimentation is carried out by hiding different 8 half tone images in carrier image. Performance of error doped image is measured majorly in two ways, one quality is measured by Correlation and Structural Similarity Index Matrix (SSIM). Second introduction of error is measured by Root Mean Square Error (RMSE). In this paper, application of half tone technique can be used for steganography, optimization of storage, image data compression, encryption and watermarking is described.