In a single-chip digital color camera, a color filter array (CFA) is used to obtain sampled spectral components (red, green and blue) in an interleaved fashion. A color demosaicing operation is then carried out to determine the missing spectral components at every location. One of the problems in color demosaicing is that many of the interpolated images are affected by colored artifacts near th...

Abstract: The current research is aimed to investigate the alterations of its opticalfeatures of novel adjustable three color narrowband optical filters, which comprise ofblue, green and red light. A narrowband adjustable transmission optical filters accordingto dielectric- ferroelectric heterostructures photonic structures are designed using thetransfer-matrix method (T...

Hand gesture recognition is very important to communicate in sign language. In this paper, an effective object tracking and hand gesture recognition method is proposed. This method is combination of two well-known approaches, the mean shift and the motion detection algorithm. The mean shift algorithm can track objects based on the color, then when hand passes the face occlusion happens. Several...

This paper introduces a class of nonlinear multichannel filters capable of removing impulsive noise in color images. The hereproposed generalized selection weighted vector filter class constitutes a powerful filtering framework for multichannel signal processing. Previously defined multichannel filters such as vector median filter, basic vector directional filter, directional-distance filter, w...

Because of their ability to reach unique vantage points, rotary-winged unmanned aerial vehicles are well suited for visual target tracking missions. However, these missions are very burdensome for the vehicle operator since he must interpret the incoming video frames, update the orientation of the camera, and update the position of the vehicle to ensure the target is successfully tracked. This ...

The role of an optical low-pass filter (OLPF) in a digital still camera is to remove the high spatial frequencies that cause aliasing, thereby enhancing the image quality. However, this also causes some loss of detail. Yet, when an image is captured without the OLPF, moiré generally appears in the high spatial frequency region of the image. Accordingly, this paper presents a moiré reduction met...

Several elementwise component transformations performed over primary color image components (RGB) before optical multichannel correlations are proposed to improve real-time multispectral pattern recognition. The first transformation is deduced from the theory of the optimal filter for object location and recognition extended to multispectral images. Several modifications of this transformation ...

This paper presents a method reconstructing 3-d image structures with data collected from double optical paths microscopy. A color image gathered is divided into two monochromatic images which respectively represent right and left vision data by color filter. Then the image structures are extracted by median filter and calculated with Sobel operator or Canny operator. Pixels between the right a...