Fundamentals of digital image processing
Fundamentals of digital image processing
Markov random field processing for color demosaicing
Pattern Recognition Letters
Reconstruction filters in computer-graphics
SIGGRAPH '88 Proceedings of the 15th annual conference on Computer graphics and interactive techniques
A new digital signal processor for progressive scan CCD
IEEE Transactions on Consumer Electronics
Software pixel interpolation for digital still cameras suitable for a 32-bit MCU
IEEE Transactions on Consumer Electronics
Demosaicing: image reconstruction from color CCD samples
IEEE Transactions on Image Processing
IEEE Transactions on Image Processing
Color plane interpolation using alternating projections
IEEE Transactions on Image Processing
Subband DCT: definition, analysis, and applications
IEEE Transactions on Circuits and Systems for Video Technology
Image resizing in the compressed domain using subband DCT
IEEE Transactions on Circuits and Systems for Video Technology
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Single sensor color digital cameras use color filter arrays (CFAs) for capturing an image. Color interpolation is then applied to the captured data for reconstructing the full color image. In this paper we present techniques for interpolating the CFA data in the YUV color space to obtain the full color image. The resulting color images could be directly used in the DCT based JPEG compression scheme. We have also used the concept of sub-band DCT computation for interpolating the individual components of color images in the DCT domain. Based on a simple strategy for computing the Y, U, and V components, several modifications are also proposed for improving the quality of the reconstructed images. We have observed that median filtering of the chrominance components improves the visual quality of the interpolated color image. The results are also compared with some of the well known interpolation algorithms and are found to have competitive advantages considering the speed of computations, quality of the image reconstruction, storage requirements, and false color suppression.