In this paper, Daubechies orthogonal wavelets are used to compress color spectra. Color spectra have many forms from sharp peaks to constant value. Compression is needed to save space in storing and bandwidth in transmission of spectra. The underlying idea of this paper is to nd suitable wavelets for compression. Quality of compression and reconstruction is measured with color diierence E from ...

In images, interreflections can change the color and the intensity that is reflected from the surfaces. An approach is presented that minimizes the interreflections in a color image and takes shadows into account. Using the HSI color space the color image is segmented into homogeneous regions. All segmented regions are examined for the occurrence of shadow and interreflections. The one-bounce m...

A new study has used magnetoencephalography to track cortical responses color as they emerge in time. Similarities and differences within these neural parallel characteristics of the perceptual experience color. It is still common describe vision terms two stages. In first, light spectrum sampled by three classes retinal cone receptors with different spectral sensitivities. second, signals are ...

-In this paper we proposed a new and simple method in order to extract the shadow area, by using the homomorphic system to emphasize more on illumination and reflection components of image gray-level value separately. In this new method all analysis carried out in the HSV color space using Value component as darkness / brightness of a color to improve the accuracy in detecting shadow area. The ...

An image difference structure is created that include of image regularization, feature derivation, and feature grouping. Based on this structure image difference measure is created by selecting exact implementations for each of the steps. An image difference prediction is then calculated using image difference features (IDFs) that are derived from the images. The input images are then regulariz...

objectives: the purpose of this research was to identify and present environmental aspects that affect elders presence and participation in urban public spaces. methods & materials: the current research is an analytic- descriptive type in survey beds. statistical sample of this research were elders over 65 years of shiraz city that attended and participated in urban public places. data of this ...

This paper has a further exploration and study of visual feature extraction. According to the HSV (Hue, Saturation, Value) color space, the work of color feature extraction is fnished, the process is as follows: quantifying the color space in non-equal intervals, constructing one dimension feature vector and representing the color feature by cumulative histogram. Similarly, the work of texture ...

A novel approach for segmentation of grayscale images, which are color scene originally, is proposed. Many algorithms have been elaborated for a grayscale image segmentation. All those approaches have been discussed in a luminance space, because it has been considered that grayscale images do not have any color information. However, a luminance value has color information as a set of correspond...

In this paper a color descriptor designed for bleeding detection in endoscopic images is proposed. The development of the algorithm was carried out on a representative training set of 36 images of bleeding and 25 clear images. Another 38 bleeding and 26 normal images were used in the final stage as a test set. All of the considered images were extracted from separate endoscopic examinations. Th...