The classical Z-buffer algorithm samples a scene at regularly spaced points on an image plane. We present an extension of this algorithm called the irregular Z-buffer that permits sampling of the scene at arbitrary points on the image plane. The sample points are stored in a two-dimensional spatial data structure which is queried during rasterization. The irregular Z-buffer can be applied to sh...

Detection and segmentation objects are crucial to extract useful information from medical images [1] and still challenging tasks in CAD software development. Due to the irregular structure and high variability of objects of interest, there is no universal solution for detecting objects and segmenting them in all kinds of medical images. This work is a part of a larger project aimed mostly at de...

We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the optical images, and 2) it is elongated in the direction almost perpendicular to the HI disk of NGC 6822. The structure of this stellar halo looks ...

Computer-aided design of porous structures is a challenging task because of the high degree of irregularity and intricacy associated with the geometries. Most of the existing design approaches either target designing artifacts with regular-shaped pores or reconstructing geometric models from existing porous objects. For regular porous structures, it is difficult to control the pore shapes and d...

We investigated the ability of honeybees to learn mazes of four types: constant-turn mazes, in which the appropriate turn is always in the same direction in each decision chamber; zig-zag mazes, in which the appropriate turn is alternately left and right in successive decision chambers; irregular mazes, in which there is no readily apparent pattern to the turns; and variable irregular mazes, in...

pore network modeling uses a network of pores connected by throats to model the void space of a porous medium and tries to predict its various characteristics during multiphase flow of various fluids. in most cases, a non-realistic regular lattice of pores is used to model the characteristics of a porous medium. although some methodologies for extracting geologically realistic irregular network...

We introduce irregular constructible sheaves, which are $\mathbb{C}$-constructible with coefficients in a finite version of Novikov ring $\Lambda$ and special gradings. show that the bounded derived category cohomologically complexes is equivalent to holonomic $\mathcal{D}$-modules by modification D'Agnolo--Kashiwara's Riemann--Hilbert correspondence. The equipped perverse t-structure, straight...