Critical review of bio‐inspired data optimization techniques: An image steganalysis perspective

Abstract

Image steganalysis involves the discovery of secret information embedded in an image. The common method is blind image steganalysis, which is a twoclass classification problem. Blind steganalysis extracts all possible feature variations in an image due to embedding, select the most appropriate feature data, and then classifies the image. The dimensionality of the extracted image features are high and demand data reduction to identify the most relevant features and to aid accurate classification of an image. The classification is under two classes namely, clean (cover) image and stego (image with embedded