Color filter array demosaicking based on the distribution of directional color differences

N Li, JSJ Li, S Randhawa - IEEE signal processing letters, 2017 - ieeexplore.ieee.org
Color artifacts are often found at edges due to interpolation across them. To tackle this
problem, four high-order interpolants for four different directions are determined, and a …

Adaptive order-statistics multi-shell filtering for bad pixel correction within CFA demosaicking

JSJ Li, S Randhawa - TENCON 2009-2009 IEEE Region 10 …, 2009 - ieeexplore.ieee.org
As today's digital cameras contain millions of image sensors, it is highly probable that the
image sensors will contain a few defective pixels due to errors in the fabrication process …

A real-time 2-D median based filter for video signals

JSJ Li, S Luthi - IEEE transactions on consumer electronics, 1993 - ieeexplore.ieee.org
A 2-D, multishell median-based filter for real-time video signal processing is presented. The
device is able to remove impulse and missing line noise in real-time without blurring sharp …

The relationship of the multi-shell to multistage and standard median filters

JSJ Li, A Ramsingh - IEEE transactions on image processing, 1995 - ieeexplore.ieee.org
It is shown that for a particular window size, by changing gradually the minimum and
maximum operators to the higher and lower order statistics of the shell, respectively, the …

FPGA based multi-shell filter for hot pixel removal within colour filter array demosaicing

D Bailey, JSJ Li - 2016 International conference on image and …, 2016 - ieeexplore.ieee.org
Modern cameras have an image sensor with millions of pixels, among which some of them
are inevitably defective (known as hot pixels). Moreover, the number of hot pixels will …

Statistical analysis of the median based multi-shell order-statistics filters

JSJ Li, A Ramsingh - Proceedings of ICASSP'94. IEEE …, 1994 - ieeexplore.ieee.org
The multi-shell median filters have been shown to be effective in preserving image details as
well as in the suppression of impulsive noise. In this paper, the statistical analysis of a …

Adaptive median based multi-shell-order-statistics filters for the removal of impulsive noise

JSJ Li, A Ramsingh - … on Speech, Image Processing and Neural …, 1994 - ieeexplore.ieee.org
The multistage and multi-shell median filters have been shown to be effective in preserving
fine image structures as well as in the suppression of noise. It has been shown that the multi …

A unified approach to bad pixel removal and adaptive CFA demosaicking

JSJ Li, S Randhawa - TENCON 2012 IEEE Region 10 …, 2012 - ieeexplore.ieee.org
The fabrication process for today's digital cameras will inevitably produce some defective
pixels in those mega-pixel image sensors. In the manufacturing process, these defective …

Integration of Adaptive CFA Demosaicking with Bad Pixel Removal

JSJ Li, S Randhawa - … : Chinese Conference, CCPR 2012, Beijing, China …, 2012 - Springer
In the manufacturing process of image sensors for digital cameras, some defective pixels
known as bad pixels will inevitably be produced and more bad pixels may emerge with …

Local histogram filtering utilizing feature-selective templates

TJ McMurray, JA Pearce - Nonlinear Image Processing III, 1992 - spiedigitallibrary.org
Local histogram filtering utilizing feature selective templates consists of ordering the
elements of the subimage histogram contained in the support of a nine element square …