Edge-Directed Image Interpolation Using Color Gradient Information
نویسندگان
چکیده
Image resampling method using color edge-directed interpolation has been developed. It uses color image gradient to perform the interpolation across image gradient rather than along image gradient. The developed combined method takes color low resolution image and grayscale high resolution image obtained by a non-linear image resampling method as an input. It includes consecutive calculation stages for high resolution color gradient, for high resolution color information interpolation and finally for high resolution color image assembling. The concept of color basic edges is used to analyze the results of color image resampling. Color basic edge points metric was suggested and used to show the effectiveness of the proposed image interpolation method.
منابع مشابه
Interpolation and Zooming Techniques Utilizing Edge-weighted Adaptive Filtering for Color Filter Array
A single sensor provided with a color filter array (CFA) format looks like a mosaic image. Each pixel in the image contains a primary color, red, green and blue, arranged alternately. Most previous interpolation and zooming techniques for CFA image utilize the gradient and the spatial information of the neighborhood color pixels around the interpolation positions. However, their characteristics...
متن کاملA Low Complexity Color Demosaicing Algorithm Based on Integrated Gradient
Color demosaicing is critical to digital cameras as it converts a Bayer sensor mosaic output to a full color image, which determines the output image quality of the camera. In this paper, an efficient decision-based demosaicing method is presented. This method exploits a new edge-sensing measure called integrated gradient (IG) to effectively extract gradient information in both color intensity ...
متن کاملLow-complexity color demosaicing algorithm based on integrated gradients
bstract. Color demosaicing is critical for digital cameras, because t converts a Bayer sensor mosaic output to a full color image, which etermines the output image quality of the camera. In this work, an fficient decision-based demosaicing method is presented. This ethod exploits a new edge-sensing measure called integrated graient (IG) to effectively extract gradient information in both color ...
متن کاملAn Effective Image Demosaicking Algorithm with Correlations among RGB Channels
In this paper, an effective image demosaicking algorithm, which is based on the correlation among the three primary colors, is proposed for mosaic image with Bayer color filter array (CFA). To reduce the distortion and improve the reconstruction quality, the proposed interpolation method makes full use of the brightness information and the edge information. We design several filters with size o...
متن کاملColor Demosaicing Using Asymmetric Directional Interpolation and Hue Vector Smoothing
This paper presents a color demosaicing method applied to the Bayer pattern color filter array (CFA). Reliable estimation of an edge direction, edge-directed asymmetric interpolation, and the use of color samples at immediate neighbors are considered as the key guidelines for smooth and sharp image restoration. Also, special interest is directed to local areas that are rich in high spatial freq...
متن کامل