This book is related to the compression in images,various compression techniques are described here like Huffman coding,lzw . This book defines the various advantages and disadvantages of various compression techniques . This book defines the secure compression in images ,here secure mean the actual data should be recover easily without loosing too much. There should be minimum noisy data .This book clearly defines the advantages and disadvantages of Least Significant Bit method. This is the basic book for beginner in this area