Computer based methods for facial age estimation can be improved by incorporating experimental findings from human psychophysics. Moreover, the latter can be used in creating systems that are not necessarily more accurate in age estimation, but strongly resemble human age estimations. In this paper we investigate the perceptual hypothesis that contrast is a useful cue for estimating age from fa...

A cylindrical coordinate colour space (lightness, saturation/chroma, hue) is derived from an opponent colour space in the RGB space. It is shown how cylindrical coordinate colour models widely used in the literature are related to or can be reduced to the derived model, thereby contributing to creating a unified cylindrical coordinate colour model. In particular, the widely used saturation expr...

In this paper we proposed a new method, in order to extract the shadow area, using the homomorphic system for more emphasizing on illumination and reflection components separately. Also we use Value component of HSV color space as darkness/lightness of a color, which tends to work better for any images. Furthermore, the presented experimental results which are obtained for shadow identification...

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A mathematically simple transformation from the Judd (1951) modified CIE space into the space spanned by the cones is derived. The transformation is based on geometrical intuition (Pitt 1945). Light fluxes that initiate vision are transmitted into electrical signals by the photoreceptors. In day light these are the retinal cones. Most humans have three types of cones with spectral sensitivities...

detecting faces in cluttered backgrounds and real world has remained as an unsolved problem yet. in this paper, by using composition of some kind of independent features and one of the most common appearance based approaches, and multilayered perceptron (mlp) neural networks, not only some questions have been answered, but also the designed system achieved better performance rather than the pre...

This paper introduces a calibration-based auto white balance method for digital still camera. The main idea is to detect white-points in an image accurately. White-Point Color Temperature Curve (WPCTC) is constructed from sensor calibration and is utilized to estimate white-point locations in a scene. Minimum Color Temperature Distance (MCTD) with a luminance threshold is defined to further loc...

This paper proposes a color correction method based on modeling the hue shift phenomenon of human visual system (HVS). Observers tend to perceive same color stimuli, but of different intensity, as different hues, what is referred to as the hue shift effect. Although the effect can be explained with the Bezold-Brücke (B-B) effect, it is not enough to apply the B-B model on high luminance display...

We propose a 3D arrangement of thumbnail images for the purpose of browsing a single video file. The thumbnail images are linearly extracted from the video and used as textures for bended screens in a 3D-ring arrangement, which act as links for the playback of the corresponding video segments. Furthermore, the thumbnail images in this 3D-ring are intuitively organized by their dominant colors a...