Abstract : In recent times, different authors have been invented various image encryption schemes using chaotic map and these schemes are better than conventional image encryption schemes. Encryp- tion of Image is one of the good techniques that maintain the confidentiality of images over online data transmission. This article concentrates on different chaotic based image encryption scheme. Each of these scheme describe that there algorithms are best to protect from different statistical at- tacks and also secure from unauthorized access. By comparing and analyzing the different chaotic based image encryption scheme, it evaluates the performance of security analysis and also focuses on the merit and demerit of these schemes. Keyword– Chaotic Map, Encryption algorithm, Security Analysis, merit and demerit of dif- ferent schemes