A REVIEW ON ENCODING AND RECONSTUCTION OF ENCRYPTED IMAGES
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 4, Issue 7
Abstract
This paper gives a scheme of encoding of encrypted greyscale images while transmission of images for security purpose. In the encryption phase, the original pixel values are masked by a modulo-256 addition with pseudorandom numbers that are derived from a secret key. After decomposing the encrypted data into a downsampled subimage and several data sets with a multiple-resolution construction, an encoder quantizes the subimage and the Hadamard coefficients of each data set to reduce the data amount. Then, the data of quantized subimage and coefficients are regarded as a set of bitstreams. At the receiver side, while a subimage is decrypted to provide the rough information of the original content, the quantized coefficients can be used to reconstruct the detailed content with an iteratively updating procedure. Because of the hierarchical coding mechanism, the principal original content with higher
Authors and Affiliations
Shweta M. Ghorpade
Search Engine : A Survey
There is lot of information available on the internet so to fetch the relevant information is very typical task . In this paper our purpose is to make a survey on various issues related to search engines li technology.
INTELLIGENT SECURITY SYSTEM USING IMAGE PROCESSING
Now a days, security systems are meant only for the purpose of recording the images like cc cameras or for giving some alerts to the security officers about the theft. But, they won’t take any action on the th...
Trusted Cloud for Data Sharing
Cloud computing is a general term for anything that involves delivering hosted services over the internet. These services are broadly divided into three categories: Infrastructure-as-a-Service (IaaS), Platform-as-...
BLACKBOX-WOMEN’S”SAFETY DEVICE
In today’s time safety of women, safety of children, safety of senior citizen is a major concern for society. Every hour and every day the news headlines are filled with crime incidents, depicting victim’s plight....
Detection of Low Vision with the help of Segmented Retinal Images
Retinal Blood Vessel segmentation is much required for detecting the cardiovascular diseases like ophthalmic pathologies, hypertension etc. The available techniques not having the features like measuring the indi...