We design and simulate a polarizing color filter with a sub-wavelength metal-dielectric grating. It manifests several advantages: a large acceptance angle (up to ±50°), high transmittance (74.3%-92.7%), low absorption loss (∼3.3%), and a high extinction ratio. This polarizing color filter can be integrated into a liquid-crystal display (LCD) backlight system to simultaneously recycle the light ...

In this paper, an effective content-based visual image retrieval system is presented. This system consists of two main components: visual content extraction and indexing, and query engine. Each image in the image database is represented by its visual features: color and spatial information. The system uses a novel color label histogram with only thirteen bins to extract the color information fr...

Human or face tracking in a diverse environment is very important for various applications in computer vision, especially for video surveillance. Usually, a color cue offers many advantages over motion or geometric information which cannot robustly handle partial occlusion, rotation, scale and resolution changes. In this paper, we present a robust face tracking system by employing a color-based...

Most of the current digital cameras will capture only one color at each of the pixel using a single sensor overlaid with a color filter array (CFA).Inorder to recover a full color image from a mosaic pattern, specific methods will be used to restore the two missing color values at each of the pixels in the Bayer pattern.The restoration process to find out the missing color samples is known as c...

Digital cameras generally use a single image sensor which surface is covered by a color filter array. The Color Filter Array (CFA) limits each sensor pixel by sampling one of the three primary color values (red, green or blue), whereas the other two missing color values would be acquired by the post-processing procedure called demosaicking. From the noisy CFA data, the full color images are rec...

Figure 1: Performance on a GTX 280 GPU of our adaptivemanifold filter (AM) versus the permutohedral lattice (PL), and the guided filter (GF). The vertical axis shows time, in seconds, to filter a 1 Megapixel RGB color image. The shaded areas represent performance changes when σr varies from 1 (bottom curve) to 0.05 (top curve). The guided filter performance curve, in dashed red, is based on per...

This paper presents an image adaptive linear filtering method for the reconstruction of the RGB (red, blue, green) color coordinates of a pixel from the lossy compressed luminance/chrominance color coordinates. In the absence of quantization noise, the RGB coordinates of a pixel can be perfectly reconstructed by employing a standard, fixed filter whose support includes only the luminance/chromi...

A new filtering approach designed to eliminate impulsive noise in color images, while preserving fine image details is presented in this paper. The comparison shows that the new filter outperforms the VMF, as well as other standard procedures used in color image processing for the elimination of impulsive noise. 1 Vector Median Filter Noise reduction is an important step in many color image pro...

Abst ract. Visual search is the task of nding objects in an image which are described in a high dimensional space, spanned by preattentive features , e.g. orientation, scale, and colour. By using steerable lters this search space may be scanned continouosly, though spanned by discrete feature detectors. Based on this idea, we will show a method for detecting arbitrarily oriented bars from steer...