A wavelet decomposition for multiscale edge detection is used to separate border edges from texture in an image, toward the goal of a complete segmentation by Active Perception for robotic exploration of a scene. The physical limitations of the image acquisition system and the robotic system provide the limitations on the range of scales which we consider. We link edges through scale space, usi...

Millions of auroral images are captured every year by ground-based imagers. Even though the auroral appearance or “type” yields relevant information about the physical processes in the ionosphere and the magnetosphere, qualitative descriptions of auroras are typically used. Modern methods including those widely used in computer vision research can, however, make it possible to use objective and...

There is often interest in identifying geometry in a scene. Edge detection is an established method of looking at scene geometry, but naive edge detection in a complex scene discerns little about the physical geometry; light and shadowing effects especially in outdoor scenes can cause edge detectors to mistakenly classify texture and shadow edges as geometry edges. However, with a sample of sev...

The sliding of a finger on a material surface results in complex physical interactions. Tactile texture displays have been limited in their ability to capture the aspects of these interactions. As a step forward, we have combined two complementary types of tactile stimuli, vibrotactile and electrostatic, to deliver roughness textures with high realism. These two types of stimuli represent the s...

in this research, the effect of different levels of carrageenan gum (0.05– 0.2%) and whey protein concentrate (0.5 - 1.5%) on physical, chemical and sensory properties of low fat mozzarella cheese have been investigated. use of these fat replacers cause significant differences (p ≤ 0.05) on chemical properties as increase in gum and wpc resulted moisture and protein content to increase but ph t...

A three-dimensional (3D) topological insulator (TI) is a unique quantum phase of matter with exotic physical properties and promising spintronic applications. However, surface spin current in a common 3D TI remains difficult to control and the out-of-plane spin texture is largely unexplored. Here, by means of surface spin photocurrent in Bi2Te3 TI devices driven by circular polarized light, we ...

This study proposes the application of fractal descriptors method to the discrimination of microscopy images of plant leaves. Fractal descriptors have demonstrated to be a powerful discriminative method in image analysis, mainly for the discrimination of natural objects. In fact, these descriptors express the spatial arrangement of pixels inside the texture under different scales and such arran...

Dynamic textures are image sequences which contain moving scenes such as a flowing river, drifting smoke, waving foliage, etc. Such image sequences have dynamical properties that are related to motion in the physical world. In this paper, we propose a novel analytical tool for analyzing dynamic textures. The key idea is to exploit the properties of the impulse responses of the state variables c...

Image based modeling techniques construct digital shape models from 2D images of physical objects. They are used in a wide range of applications, where both virtual and real data is required. Texture information is a crucial part of virtual models used to represent real world objects in simulations, animations, virtual and augmented reality, reverse engineering, and various other applications. ...

Environment mapping is a popular technique for creating consistent lighting when compositing a virtual object into a real scene. However, capturing an environment map usually requires physical access to the scene to obtain illumination measurements. But what if all one has available is a single photograph of the scene? In this paper, we study techniques for synthesizing plausible environment ma...