A Novel Approach for Secured Image Transmission by Reversible Colour Transformations

Information security is becoming increasingly significant in the modern world. Secure Image Transmission has a potential of being adopted for mass communication. Numerous stenographic techniques for transmitting information without raising suspicion are found in. Recently, many methods have been proposed for secure image transmission, for which two common approaches are image encryption and data hiding. In image encryption, image is encrypted as a noise image by this it may arouse an attacker’s attention during transmission in data hiding image hiding on a cover image, if the secret image is large compare to cover we have to compress secret image but this type of compression not practicable in many applications Conversely A new secure image Transmission technique is implemented, known as secret fragment visible mosaic image which allows the user to securely transmit an image under the cover of another image of same size, This method presents an approach where mosaic image generation has done by dividing the secret image into fragments and transforming their respective color characteristics into corresponding blocks of the target image. Usage of the Pixel color transformations helps to yield the lossless recovered image based on the untransformed color space values. Generation of the key plays an important role to recover the secret image from the mosaic image in lossless manner. Finally the same approach can be performed on videos also which helps to eliminate the flickering artifact to achieve the lossless data recovery in motion related videos. The experimental results show good robust behavior against all incidental and accidental attacks and compare to the conventional algorithms.