We present techniques for spectral image acquisition. The spectral domain of the images is represented by a lowdimensional component image set, which is used to obtain an efficient compression of the high-dimensional spectral data. First, computational techniques to design color filters with a constraint of positive spectral values is described. Then, we present two prototypes of our spectral i...

Plants often attract pollinators with floral displays composed of visual, olfactory, tactile and gustatory stimuli. Since pollinators' responses to each of these stimuli are usually studied independently, the question of why plants produce multi-component floral displays remains relatively unexplored. Here we used signal detection theory to test the hypothesis that complex displays reduce a pol...

This paper proposes a new method for enhancing the contrast as well as brightness of color images, based on orthogonal D4 Wavelet transform human visual system and also considers distinction between the background and foreground of the images. The RGB (Red, Green, and Blue) values of each pixel in a color image are converted to HSI (Hue, Saturation, and Intensity) value. On the S components of ...

Feature discrimination is a critical component in large scale satellite image browsing and retrieval, as well as in other areas of remote sensing. As many satellite images are multi-spectral, the spectral information should be exploited for efficient browsing and retrieval. In this aspect, color is a suitable candidate to represent the spectral contents. This paper presents an efficient algorit...

In order to research the problem of the gray edge and leaving out some edges during detecting the color edges, the color contrast enhancement algorithm is designed that it dependences on decomposing the interrelated color component of the color images based on RGB color model. And the edge detection improved method is proposed based on the above algorithm. Namely, the components edges are compu...

Digital cameras record only one color component per pixel, red, green or blue. Demosaicking is the process by which one can infer a whole color matrix from such a matrix of values, thus interpolating the two missing color values per pixel. The selected color configuration of the sensor usually follows the Bayer color filter array, CFA. Out of a group of four pixels, two are green (in quincunx),...

A diffractive grating is promising for color separation to effectively replace conventional absorptive dye color filter in liquid crystal displays. In this paper, we demonstrated a color separation module consisting of an aspheric-lenticular lens array and a blazed grating to substitute for the dye color filter. Each component was designed to match the recent fabrication ability of our roll-to-...

In this paper we present two approaches to highlight removal in color images. The first approach is based on a global analysis of a single color image. Threedimensional color descriptors are transformed to a pair of two-dimensional descriptors. The second approach is based on a local analysis of three color images. The images are taken in analogy to photometric stereo tasks. For every surface p...

A new color space, YCgCr, is described and applied for face detection. Although similar to the YCbCr color space, it differs in the use of the Cg color component instead of the Cb one. Here, the fundamentals of this new color space YCgCr are presented and its capabilities and advantages over YCbCr are analyzed. After describing the face extraction technique and the required decision values, the...

Aim at the identification of Lingwu dates in the natural environment, a method for image segmentation based on BP neural network was put forward. After compressing the collected images, color feature of dates was analyzed in color spaces to select apposite color spaces and their components for recognition. And finally,the BP neural network was used to identify Lingwu dates. Experimental results...