An Adoptive approach in Demosaicing True Color from Digital Camera having Bayer Color Filter
Journal Title: International Journal of Computer Science & Engineering Technology - Year 2013, Vol 4, Issue 10
Abstract
Single sensor with Bayer pattern color filters are used to reduce size and cost of consumer digital cameras. These cameras use various demosaicing algorithms to construct the entire image with true colors from the acquired insufficient RGB (Red,Green and Blue) mosaics. In order to estimate original true colors, iterative demosaicing algorithms are being employed. These algorithms incur high cost in computing and process all the pixels irrespective of the content of the image. The computation expense of algorithm and the quality of image are directly proportional. However, it has been observed that for homogeneous region, the simple (non-iterative) and complicated (iterative) demosaicing algorithms yield result in same image quality. In this paper, homogeneous and heterogeneous regions of images are identified using neighboring color dependency matrices namely NRDM (Neighboring Red Dependency Matrix), NBDM (Neighboring Blue Dependency Matrix) and NGrDM (Neighboring Green Dependency Matrix). The color distribution of homogeneous, heterogeneous regions is evaluated from these dependency matrices and used to identify the type of selected region. The identified region type is considered for determining a demosaicing algorithm having less computation provides the same image quality. The simple, non-iterative demosaicing algorithms are employed in homogeneous regions and iterative algorithms are used in heterogeneous regions. The image quality metrics Mean Square Error (MSE) is used to evaluate the proposed adaptive method with the existing iterative algorithms. The reduction in MSE values shows the effectiveness of the proposed adaptive approach.
Authors and Affiliations
B. Rajesh Kanna
Keywords
Related Articles
- EP ID EP136176
- DOI -
- Views 108
- Downloads 0
AN ENHANCED PRIVACY PRESERVING SEARCH ENGINE FRAMEWORK USING GREEDY ALGORITHM
By using internet, the user collect all the information. Because of weak search quality the users get irrelevant information. By using Personalized Web Search (PWS), this paper achieves the highquality search results. In...
Novel Approach for Detection of Brain Tumor using Segmentation Techniques
Medical Image Processing is one of the standard method to detect the abnormal tissue. The key benefit of this field is reduction of manual work and early detection of the disease. Various types of medical imaging modalit...
Privacy preservation for Neural Network Training
Data mining enables us to extract interesting patterns from huge volumes of data. This can be a security/privacy issue, if we make sensitive information available to unintended users as a result of mining. Preserving the...
Li-Fi - The Future of Internet
Wireless network has now become the most common form of internet. The use of wireless internet either at home or public places can sometimes lead to slow internet speed and increased processing time as more than one devi...
EXTRACT THE PUNJABI WORD WITH EDGE DETECTOR FROM MACHINE PRINTED DOCUMENT IMAGES
Optical character recognition is the essential area of research in the world. Text segmentation and extraction is an important task under the OCR System. OCR system depends on the quality of the input document and type o...