An Efficient Adaptive Filtering for CFA Demosaicking
Journal Title: International Journal on Computer Science and Engineering - Year 2010, Vol 2, Issue 4
Abstract
Most digital still cameras acquire imagery with a color filter array (CFA), ampling only one color value for each pixel and interpolating the other two color values afterwards. The nterpolation process is commonly known as demosaicking. In general, a good demosaicking method should preserve the highfrequency information of imagery as much as possible, ince such nformation is essential for image visual quality. We discuss in this paper two key observations for preserving igh-frequency information in CFA emosaicking: 1) the high frequencies are similar across three color omponents, and 2) the high frequencies along the horizontal and vertical axes are essential for image quality. Our frequency analysis of CFA mples indicates that filtering a CFA image can better preserve high frequencies than filtering each color component parately. This motivates us to design an efficient filter for stimating the luminance at green pixels of the CFA image and devise an adaptive filtering approach to estimate the minance t red and blue pixels. Experimental results on imulated ages, as well as raw data, verify that the proposed method tperforms the existing methods both visually and in terms of eak signal- onoise ratio, at a notably lower mputational cost
Authors and Affiliations
Dev. R. Newlin , Elwin Chandra Monie
Keywords
Related Articles
- EP ID EP139717
- DOI -
- Views 96
- Downloads 0
Comparative and Analysis of Biometric Systems
Biometric as the science of recognizing an individual based on his or her physical or behavioral traits, it is beginning to gain acceptance as a legitimate method for determining an individual identity. Biometric have no...
DEFINING RELATIONS IN PRECISIATION OF NATURAL LANGUAGE PROCESSING FOR SEMANTIC WEB
As we know people using semantic web which facilitates them to organize, locate and process content. The content access by people comfortably is the natural language which we all use in our day to day life. The Semantic...
CIRS: A State-Conscious Concurrency Control Protocol for Replicated Real-Time Databases
Replication [5] is the technique of using multiple copies of a server or a resource for better availability and erformance.Each copy is called a replica. The main goal of replication is to improve availability, since a...
A Survey paper: Data Security in Local Networks Using Distributed Firewalls
Computer and Network security are the means of prevention and detection of unauthorized actions by users of computer system. The unauthorized action can be defined by the security policies which defines the security rule...
Tree-kNN: A Tree-Based Algorithm for Protein Sequence Classification
The phylogenomic classification of protein sequences attempts to categorize a given protein within the evolutionary context of the entire family. It involves mainly four steps: selection of homologous sequences, multiple...