In this paper, we propose a new method, called an adaptive skin color xlter, for detecting skin color regions in a color image. The use of skin color provides an e$cient way to "nd candidate regions for faces or hands in color images. However, it is not easy to "nd skin color regions because the color of skin regions varies from image to image due to a variety of reasons. Since most of the prev...

Robust real−time tracking of non−rigid objects in a dynamic environment is a challenging task. Among various cues in tracking, color can provide an efficient visual cue for this type of tracking problem because of its invariance in the presence of changing complex shapes and appearances. To track the color object, a particle filter uses several hypotheses simultaneously and weights them by thei...

A method of designing polarization rotators with double-liquid-crystal (LC) cells is presented. When placed between a polarizer and an analyzer, the polarization rotator becomes a polarizing color filter. Any required color can be generated by optimization of the parameters of the double-LC layers. One specific example of a green filter is given. This filter is analyzed in terms of the optical ...

Recently, several RGB-White (RGBW) color filter arrays (CFAs) have been proposed, which have extra white (W) pixels in the filter array that are highly sensitive. Due to the high sensitivity, the W pixels have better SNR (Signal to Noise Ratio) characteristics than other color pixels in the filter array, especially, in low light conditions. However, most of the RGBW CFAs are designed so that th...

Due to their extraordinary abilities manipulate light propagation at the nanoscale, dielectric resonators that generate electric and magnetic Mie resonances for minimal optical loss have recently attracted great interest. Based on an all-dielectric metasurface, made of H-type silicon nanoarrays, this study proposed constructed a visible-wavelength-range color filter, with high-quality resonance...

To enhance SNR performance by reducing crosstalk in backside illumination (BSI) pixel structure of CMOS image sensor, a new process technology, named as ‘lensed color filter’, was developed. Effective color filter thickness is increased while optical height is lower than conventional structure. The real chip with 1.12um pixels and 12Mega resolution was manufactured. It has 25% higher color filt...

The primary issue involved in image and signal processing is to efficiently remove noise from a digital color image while preserving its features. A fuzzy filter is presented for the reduction of additive noise for digital color images. The filter consists of two sub filters. The first sub filter computes fuzzy distances among the color components of the central pixel and its neighborhood. Thes...