The design of the lighting environment is important for determining room specifications. Recently, systems that can change the lighting environment in a room by controlling the direction and intensity of light using a computer have been proposed. ...

Shadow (Guo et al., 2021) is a lightweight block cipher based on a new logical combination method of AND-RX operation and the generalized Feistel structure with high diffusion and excellent performance in hardware implementation. In this paper, ...

Let X be an n-element set and let F be a family consisting of k-subsets of X. The matching number of F is defined as the maximum number of pairwise disjoint members in F. A ( k − 1 )-set E is called a shadow of F if E is contained in some member ...

Two families A and B are called cross t-intersecting if | A ∩ B | ≥ t for all A ∈ A, B ∈ B. Let n , k , t be positive integers and A , B ⊆ ( n k ). Pyber proved that if A and B are cross 1-intersecting, then | A | | B | ≤ ( n − 1 k − 1 ) 2 for ...

Let V be an n-dimensional vector space over the finite field F q, and let L ( V ) = ⋃ 0 ≤ k ≤ n [ V k ] be the set of all subspaces of V. A family of subspaces F ⊆ L ( V ) is s-union if dim( F + F ′ ) ≤ s holds for all F, F ′ ∈ F. A ...

Katona’s intersection theorem states that every intersecting family $\mathcal{F}\subseteq {[n]}^{(k)}$ satisfies $|\partial \mathcal{F}|⩾|\mathcal{F}|$, where $\partial \mathcal{F}=\{F\backslash \{x\}:x\in F\in \mathcal{F}\}$ is the shadow of $\mathcal{F}$. Frankl conjectured that for $n>2k$ and every intersecting family $\mathcal{F}\subseteq {[n]}^{(k)}$, there is some $i\in [n]$ such that $|\partial \mathcal{F}(\mathrm{...}\mathcal{}$$\mathcal{}\mathcal{}$$\mathcal{}$$\left(\begin{array}{c}\mathrm{}\\ \mathrm{}\end{array}\right)$$$${}_{\mathrm{}}{}_{}{}^{}$$\mathcal{}{}_{\mathrm{}}{}_{}\mathcal{}{}_{\mathrm{}}{}_{}$

Shadows are one of the most commonly observed optical phenomena in real-world environments. Often they are encountered in a target-scene area depending on the angle of view, scene structure, scene illumination, and scene geometry. In ...

We study the size of the shadow of k-uniform hypergraphs with bounded degree. Lower bounds on the ratio of the size of the shadow and the size of the hypergraph are given as a function of the degree bound and k. We show that cliques are extremal ...

In general, intrinsic image decomposition algorithms interpret shading as one unified component including all photometric effects. As shading transitions are generally smoother than reflectance (albedo) changes, these methods may fail in ...

This paper explores a novel concept of textile-based shadow displays that incorporates shape memory alloys (SMA) on fabrics to cast dynamic shadows as an ambient information display. To explore this, we implemented a lamp prototype, capable of ...

The popularity of mobile terminals has generated massive moving objects with spatio-textual characteristics. A top-k spatial keyword query over moving objects (Top-k SKM query) returns the top-k objects, moving or static, based on a ranking ...

According to actual application scenarios that may produce shadows that may affect analysis and recognition, a shadow removal algorithm based on HSV color space and region growth is proposed. First the images are transformed to HSV color space, the ...

Background subtraction algorithm is essential for video processing. such as target tracing, gesture recognition and gait recognition. ViBe has been widely used because of easy implementation and high efficiency. However, the algorithm would produce a ...

We provide a necessary and sufficient condition for stars to be the largest cross-intersecting families.

In this paper, a novel dual-image-based reversible data hiding scheme using exploiting modification direction (EMD) is proposed. This scheme embeds two 5-base secret digits into each pixel pair of the cover image simultaneously according to the ...

A cast shadow is one of the visual features that serve as a perceptual cue to the three-dimensional (3D) layout of objects. Although it is well known that adding cast shadows to an object produces the illusion that the object has a 3D layout, ...

Basically, the Synthetic Aperture Radar (SAR) images are often degraded due to three factors namely noise, blur and artifact. The noise is the undesirable fluctuation in a random portion of the image and is often detracts from the image. The blur will ...

Currently, the existence of an extremal singly even self-dual code of length 24k + 10 is unknown for all nonnegative integers k. In this note, we study singly even self-dual [24k + 10, 12k + 5, 4k + 2] codes. We give some restrictions on the possible ...

The presence of shadows in satellite images is inevitable, and hence, shadow detection and removal has become very essential. In this paper, a shadow detection algorithm based on PSO has been used to identify shadows in very high-resolution satellite ...

To provide cultural night experiences with tourists in Kanazawa City, we exhibited our interactive digital installation titled "Temari and Shadow" at the open space of the 21st Century Museum of Contemporary Art, Kanazawa. Our installation utilizes ...