Grayscale images are fundamental to many image processing applications like data compression, feature extraction, printing and tone mapping. However, some information is lost when converting from color grayscale. In this paper, we propose a light-weight high-speed decolorization method based on human perception of temperatures. Chromatic aberration results differential refraction light dependin...

colors as a key element of emotional (sentimental) impacts and interaction with its surrounding, which is the most important visual factor, has had a great importance in the history of art and culture of iran for decades. this key element has shown its importance in several historical monuments and buildings. a large number of color theoreticians believe that colors affect the human beings’ spi...

Context. H II regions and planetary nebulae (PNe) both emit at radio and infrared (IR) wavelengths, and angularly small H II regions can be mistaken for PNe. This problem of classification is most severe for H II regions in an early evolutionary stage, those that are extremely distant, or those that are both young and distant. Previous work has shown that H II regions and PNe can be separated b...

We present a measurement of the surface brightness of the cosmic X-ray background (CXB) in the Chandra Deep Fields, after excluding all detected X-ray, optical and infrared sources. The work is motivated by a recent X-ray stacking analysis by Worsley and collaborators, which showed that galaxies detected by HST but not by Chandra may account for most of the unresolved CXB at E > 1 keV. We find ...

this study focused on the role of appropriate equivalence selection of colors in the field of advanced pranic healing (aph), based on mona baker’s equivalence, both at word level and above word level. the partici- pants included 40 bachelor’s students studying in the field of english translation. participants received the colors’ translation test (ctt) included in the book “advanced pranic heal...

The line integral convolution (LIC) method, originally developed for imaging vector fields in scientific visualization, has the potential to produce images with directional characteristics. In this paper, we present four techniques to explore the use of LIC in generating images in the style of the Impressionists. In particular, we develop an Impressionist Line Integral Convolution algorithm (IL...

The mid-infrared emission from 18 nearby galaxies imaged with the IRAC instrument on Spitzer Space Telescope samples the spatial distributions of the reddening-free stellar photospheric emission and the warm dust in the ISM. These two components provide a new framework for galaxy morphological classification, in which the presence of spiral arms and their emission strength relative to the starl...