Shape analysis is a fundamental and difficult problem in computer vision. It is crucial for recognition, video tracking, image retrieval and other applications. This paper proposes 2D shape analysis by using geodesic distance. It focuses on how to apply geodesic distance for shape matching and shape decomposition. Geodesic Fourier Descriptors is developed as a kind of shape representation for s...

Anatomical shapes present a unique problem in terms of accurate representation and medical image segmentation. Three-dimensional (3D) statistical shape models have been extensively researched as a means of autonomously segmenting and representing models. We present a method based on a principal component analysis of a stack of 2D contours represented as Fourier descriptors (FDs). A training set...

2D bulk PdSe2, a group 10 noble metal dichalcogenide, is recognized as newly found far-infrared material with bandgap energy (E G) of ≈0.05 eV and thus has attracted much attention an optoelectronic material. However, the PdSe2 subject controversial debate middle ≈0.3 also reported by electrical transport measurements. Although determining E G optical absorption measurement essential, difficult...

The formation of hydrogen bonds was investigated on the P-rich InP 001 surface employing attenuated total-reflection Fourier-transform infrared spectroscopy, low-energy electron diffraction, and total-energy density-functional theory calculations. Strong evidence was found for a c 2 2 -2P-3H reconstruction with a higher hydrogen coverage than is characteristic for the metal-organic chemical-vap...

A recent claim that the S-duality between 4d SUSY gauge theories, which is AGT related to the modular transformations of 2d conformal blocks, is no more than an ordinary Fourier transform at the perturbative level, is further traced down to the commutation relation [P̌ , Q̌] = −i~ between the check-operator monodromies of the exponential resolvent operator in the underlying Dotsenko-Fateev matrix...

A remote sensing image is composed of vegetation and base rock or soil in moutain areas, which can be decomposed by the fractal model through Fourier transformation to enhance base rock or soil information. In this paper, four scene images of two types of bed rock from Anhui province are taken as a case to demonstrate the method’s validity: two scene images’ base rocks are monzonite granite whi...