hi.. my name is richard. i would like to get details on free code for reversible image data hiding with contrast enhancement. Can you give me free code?

This system is proposed for digital images, mainly focussed on grey scale images.
Usual algorithms just keep the PSNR values high to enhance the contrast of an
image, where this system enhances the image quality as well as its security and
decreases the bandwidth consumed. For embedding data in the image highest two
peaks in the histogram are selected and then repeated the same process for
performing histogram equalization. The data is embedded in the image,
compressed and encrypted using chaotic encryption such that the data and image
are completely recoverable. The system with the proposed algorithm was
performed on two sets of images to prove its efficiency. It is found that, by
embedding considerable amount of data into the image, the contrast of the image
is being enhanced. It is proved that, this system works better than the three inbuilt
MATLAB functions for contrast enhancement which as an add-on provides
compression and encryption for better security.