It has been recently proposed that the blue-green coloration in eggs of many avian species may constitute a sexually selected female signal. Blue-green color intensity would reflect the physiological condition of females, and hence it might also affect the allocation of male parental care. In this study, we use three different experimental approaches to explore the importance of sexual selectio...

No-reference image quality assessment is an image characterization task of sorts. We explore the chromatic characterization of color images and relate it to image quality. Poor image quality is usually related to a loss of contrast; contrast is measured along the color dimensions of luminance, saturation and hue (which is a circular variable). The distribution of saturation as a function of lum...

We report the first time-series measurements of Sgr A*-IR’s broadband infrared color. Using the newly commissioned laser guide star adaptive optics (LGS AO) system on the Keck II telescope, we imaged Sgr A*-IR in the broadband filters H (1.6 μm), K’ (2.1 μm), and L’ (3.8 μm) every 3 minutes over the course of 120 minutes, during which time the Chandra Xray Observatory was also monitoring the Ga...

The work reported here was part of a program of research on how warning lamps affect driver vision, and how those lamps can be designed to provide the most benefit for the safety of emergency vehicle operations. In order to understand the overall effects of lamps on safety, it is necessary to know about the positive (intended) effects of the lamps on vehicle conspicuity, as well as any negative...

Andrea Baraldi Flavio Parmiggiani IMGA-CNR Via Emilia Est 770 41100 Modena, Italy E-mail: [email protected] Abstract. In the literature on computer vision, very few contour detection algorithms are designed to deal with color images. In this paper, we present the multispectral contour detection algorithm (MSCDA) which is designed to process multispectral digital images as well as monoch...

The attraction of adult Chironomus salinarius to incandescent 3-W lamps of 7 different colors used in CDC traps was studied on a small island in the lagoon of Venice, Italy. An ANOVA indicated that the lamp type was a highly significant (P < 0.01) factor associated with differences in light trap catch (28% of total variation), as well as catch per lux (18% of total variation). The white lamp at...

Some stomatopod crustacean species that inhabit a range of habitat depths have color vision systems that adapt to changes in ambient light conditions. To date, this change in retinal function has been demonstrated in species within the superfamily Gonodactyloidea in response to varying the spectral range of light. Intrarhabdomal filters in certain ommatidia within the specialized midband of the...

A new concept and algorithm are presented for noniterative robust estimation of piecewise smooth curves of maximal edge strength in small image windows – typically to . This boundary-estimation algorithm has the nice properties that it uses all the data in the window and thus can find locally weak boundaries embedded in noise or texture and boundaries when there are more than two regions to be ...

BACKGROUND Computer image analysis techniques have decreased effects of observer biases, and increased the sensitivity and the throughput of immunohistochemistry (IHC) as a tissue-based procedure for the evaluation of diseases. METHODS We adapted a Cyan/Magenta/Yellow/Key (CMYK) model for automated computer image analysis to quantify IHC stains in hematoxylin counterstained histological secti...

The colors of the human skin represent a special category of colors, because they are distinctive from the colors of other natural objects. This category is found as a cluster in color spaces, and the skin color variations between people are mostly due to differences in the intensity. Besides, the face detection based on skin color detection is a faster method as compared to other techniques. I...