A novel introduced for automatic conversion of huge volume secret image to protected equally sized mosaic image for transmitting image securely. This mosaic image, designed to resemble randomly chosen target image, acts as a camouflage for the secret image, enhancing its security during transmission. The above process is accomplished by separating required image to equal parts called fragments arranging their properties of colour to the matching blocks in the resultant or target. Innovative methodologies are developed to process the colour imaging methods are devised to execute the colour translation similarly the secret picture can be retrieved with minimal loss. Furthermore, a method for handling overflows and underflows in the converted pixel colour values is introduced to ensure the integrity of the colour transformation. This process includes copying the colour changes in the original colour space without conversion. The important data required for secret image recovery is then entrenched into the subsequent mosaic tiled image using a lossless data hiding structure, which is implemented with a unique key for added security.