Scale Selective Extended Local Binary Pattern for Texture Classification

In this paper, we propose a new texture descriptor, scale selective extended local binary pattern (SSELBP), to characterize texture images with scale variations. We first utilize multi-scale extended local binary patterns (ELBP) with rotation-invariant and uniform mappings to capture robust local micro- and macro-features. Then, we build a scale space using Gaussian filters and calculate the histogram of multi-scale ELBPs for the image at each scale. Finally, we select the maximum values from the corresponding bins of multi-scale ELBP histograms at different scales as scale-invariant features. A comprehensive evaluation on public texture databases (KTH-TIPS and UMD) shows that the proposed SSELBP has high accuracy comparable to state-of-the-art texture descriptors on gray-scale-, rotation-, and scale-invariant texture classification but uses only one-third of the feature dimension.Comment: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 201

The Design and Implementation of an Image Segmentation System for Forest Image Analysis

The United States Forest Service (USFS) is developing software systems to evaluate forest resources with respect to qualities such as scenic beauty and vegetation structure. Such evaluations usually involve a large amount of human labor. In this thesis, I will discuss the design and implementation of a digital image segmentation system, and how to apply it to analyze forest images so that automated forest resource evaluation can be achieved. The first major contribution of the thesis is the evaluation of various feature design schemes for segmenting forest images. The other major contribution of this thesis is the development of a pattern recognition-based image segmentation algorithm. The best system performance was a 61.4% block classification error rate, achieved by combining color histograms with entropy. This performance is better than that obtained by an ?intelligent? guess based on prior knowledge about the categories under study, which is 68.0%

Summary of Animal and Plant Quarantine Objects in the Imported Parcels and X-ray Pattern Identification

The quantity of the imported parcels in China has increased rapidly,becoming an important means for criminals to hide the prohibited animal and plant quarantine objects.The x-ray applied to the port of post inspection can speed up inspection and better protect the ecological safety of China by mastering its method of judging animal and plant quarantine objects

From Pyrochlore to the Tripod Kagome Lattice: Magnetism of New Compound Family A2RE3Sb3O14 (A = Mg, Zn; RE = Pr, Nd, Gd, Tb, Dy, Ho, Er, Yb)

Geometrical frustration refers to the inability of a complex system to satisfy all its competing interactions within an underlying topological constrained lattice. The two-dimensional kagome lattice is one of the most frustrated lattices and has been a favorite in the theoretical condensed matter community. However, the large variety of exotic states predicted in kagome lattices lies in contrast to a paucity of experimental systems, making new kagome lattice compounds highly desired. In this dissertation, I shall provide a systematic study of the structural and magnetic properties of a new compounds family, A2RE3Sb3O14 (A = Mg, Zn; RE = Pr, Nd, Gd, Tb, Dy, Ho, Er, Yb). These compounds feature a hitherto unstudied \tripod kagome lattice (TKL) that was realized by partial ion substitution in the pyrochlore structure. In this dissertation, I shall first brie y introduce the frustrated magnetism and experimental methods in the first two chapters. The third part will cover some general aspects of the TKL, including its structural relation to the pyrochlore lattice, the unique tripod-like spin anisotropies, and spin Hamiltonian. In the fourth chapter, I shall present susceptibility (dc, ac) and specific heat measurements and do a case by case investigation of their magnetic ground states. These include non-collinear spin orders, dipolar spin orders, spin glasses, magnetic charge orders, and several quantum spin liquids. These ground states are compared with the parent pyrochlore lattice and are understood from the standpoint of a balance among spin-spin interactions, anisotropies and Kramers/non-Kramers nature of single ion state. In the fifth chapter, an in-depth neutron scattering study of Mg2Ho3Sb3O14 is provided, demonstrating the system to be a kagome spin ice from a transverse Ising model. The last section contains the conclusions of this dissertation and offers perspectives for future work