In order to texture surfaces realistically with texture images (e.g. photos), it is important to consider the underlying relief. Here, a method is proposed to recover a coherent bump map from a single texture image. Different visual zones are first identified using segmentation and classification. Then, by linearly separating the relief into a noise-like small-scale component and a smooth “shap...

We present a color image encryption algorithm by using chaotic mapping and Hartley transform. The three components of color image are scrambled by Baker mapping. The coordinates composed of the scrambled monochrome components are converted from Cartesian coordinates to spherical coordinates. The data of azimuth angle is normalized and regarded as the key. The data of radii and zenith angle are ...

We have searched for IR emission from the intracluster dust (ICD) in the galaxy cluster A2029. Weak signals of enhanced extended emission in the cluster are detected at 24 and 70 μm. However, the signals are indistinguishable from the foreground fluctuations. The 24 versus 70 μm color map does not discriminate the dust emission in the cluster from the cirrus emission. After excluding the contam...

In the last decade, multiscale techniques for gray-level texture analysis have been intensively used. In this paper, we aim on extending these techniques to color images. We introduce wavelet energy-correlation signatures and we derive the transformation of these signatures upon linear color space transformations. Experiments are conducted on a set of 30 natural colored texture images in which ...

Visual texture segregation is the perceptual phenomenon illustrated in figure 17.1. In this image a rectangular area composed of small X-shaped patterns appears as a distinct region against a background of L-shaped patterns. This segregation occurs rapidly and unconsciously, without effort or search. The rectangular area composed of Tshaped patterns, however, does not appear as a distinct regio...

Near-infrared imaging has been considered as a solution to provide high quality photographs in dim lighting conditions. This imaging system captures two types of multimodal images: one is nearinfrared gray image (NGI) and the other is the visible color image (VCI). NGI is noise-free but it is grayscale, whereas the VCI has colors but it contains noise. Moreover, there exist serious edge and bri...

UNLABELLED Here, we report the development of SOCS (short oligonucleotide color space), a program designed for efficient and flexible mapping of Applied Biosystems SOLiD sequence data onto a reference genome. SOCS performs its mapping within the context of 'color space', and it maximizes usable data by allowing a user-specified number of mismatches. Sequence census functions facilitate a variet...

We study the influence of the choice of color space for local tone mapping methods. Many local tone mapping methods do not perform well when applied independently to the three color channels of an RGB image. A common solution is to only treat the luminance channel. However, the question of which color space provides the most suitable luminance definition has not been addressed. The correlation ...