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Combined display of all available logs of Algorithm Wiki. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

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  • 10:25, 15 February 2023 Admin talk contribs created page Environment Mapping (Created page with "{{DISPLAYTITLE:Environment Mapping (Texture Mapping)}} == Description == Texture mapping means the mapping of a function onto a surface in 3D. The domain of the function can be one, two, or three dimensional, and it can be represented by either an array or a mathematical function. The source image (texture) is mapped onto a surface in 3D object space, which is then mapped to the destination image (screen) by the viewing projection. Texture space is labeled $(u, v)$, o...")
  • 10:25, 15 February 2023 Admin talk contribs created page Rasterization (Created page with "{{DISPLAYTITLE:Rasterization (Rasterization)}} == Description == Raster-scan displays are most commonly driven by a frame buffer, a memory that stores the color value for every picture element on the screen and refreshes the display continuously. The process of generating these picture clement values from a geometric description of the image is known as rasterization. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" s...")
  • 10:25, 15 February 2023 Admin talk contribs created page Partially Observable Markov Decision Process (Redirected page to POMDPs) Tag: New redirect
  • 10:25, 15 February 2023 Admin talk contribs created page POMDPs (Created page with "{{DISPLAYTITLE:POMDPs (POMDPs)}} == Description == At (discrete) time step $t$, the environment is assumed to be in some state $X_t$. The agent then performs an action (control) $A_t$, whereupon the environment (stochastically) changes to a new state $X_{t+1}$. The agent doesn’t see the environment state, but instead receives an observation $Y_t$, which is some (stochastic) function of $X_t$. (If $Y_t = X_t$, the POMDP reduces to a fully observed MDP.) In addition, t...")
  • 10:25, 15 February 2023 Admin talk contribs created page Clock Synchronization in Distributed Systems (Created page with "{{DISPLAYTITLE:Clock Synchronization in Distributed Systems (Clock Synchronization in Distributed Systems)}} == Description == The difference between the largest and the smallest clock values among all stations in a Mobile Ad Hoc Network (MANET) is called the maximum clock offset. The goal is to minimize the maximum clock offset. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%"...")
  • 10:25, 15 February 2023 Admin talk contribs created page Mesh Simplification (Created page with "{{DISPLAYTITLE:Mesh Simplification (Mesh Simplification)}} == Description == Given a surface mesh, accurately simplify it so that you may render the mesh accurately with less computing power. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | Coplanar facets merging - M.J. De Haemer and M.J. Zy...")
  • 10:25, 15 February 2023 Admin talk contribs created page Image Segmentation (Created page with "{{DISPLAYTITLE:Image Segmentation (Image Segmentation)}} == Description == Image segmentation is the division of an image into different regions, each having certain properties. It is the first step of image analysis which aims at either a description of an image or a classification of the image if a class label is meaningful. An example of the former is the description of an office scene. An example of the latter is the classification of the image of a cancerous cell....")
  • 10:25, 15 February 2023 Admin talk contribs created page Point-in-Polygon (Created page with "{{DISPLAYTITLE:Point-in-Polygon (Point-in-Polygon)}} == Description == With a given polygon $P$ and an arbitrary point $q$, determine whether point $q$ is enclosed by the edges of the polygon. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | Ray casting algorithm Shimrat; M (Point-in-Polygon...")
  • 10:25, 15 February 2023 Admin talk contribs created page Specular Reflection (Created page with "{{DISPLAYTITLE:Specular Reflection (Texture Mapping)}} == Description == Texture mapping means the mapping of a function onto a surface in 3D. The domain of the function can be one, two, or three dimensional, and it can be represented by either an array or a mathematical function. The source image (texture) is mapped onto a surface in 3D object space, which is then mapped to the destination image (screen) by the viewing projection. Texture space is labeled $(u, v)$, o...")
  • 10:25, 15 February 2023 Admin talk contribs created page Diffuse Reflection (Created page with "{{DISPLAYTITLE:Diffuse Reflection (Texture Mapping)}} == Description == Texture mapping means the mapping of a function onto a surface in 3D. The domain of the function can be one, two, or three dimensional, and it can be represented by either an array or a mathematical function. The source image (texture) is mapped onto a surface in 3D object space, which is then mapped to the destination image (screen) by the viewing projection. Texture space is labeled $(u, v)$, ob...")
  • 10:25, 15 February 2023 Admin talk contribs created page CPSP (Redirected page to Cyclic Peptide Sequencing Problem) Tag: New redirect
  • 10:25, 15 February 2023 Admin talk contribs created page Cyclic Peptide Sequencing Problem (Created page with "{{DISPLAYTITLE:Cyclic Peptide Sequencing Problem (Cyclic Peptide Sequencing Problem)}} == Description == Given an experimental $MS^3$ spectrum $S$, find a cyclic peptide $P$ maximizing the number of shared masses between $S$ and the theoretical spectrum of $P$. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! R...")
  • 10:25, 15 February 2023 Admin talk contribs created page Distributed Locking Algorithms (Created page with "{{DISPLAYTITLE:Distributed Locking Algorithms (Distributed Locking Algorithms)}} == Description == The purpose of a lock is to ensure that among several nodes that might try to do the same piece of work, only one actually does it (at least only one at a time). That work might be to write some data to a shared storage system, to perform some computation, to call some external API, or suchlike. At a high level, there are two reasons why you might want a lock in a distrib...")
  • 10:25, 15 February 2023 Admin talk contribs created page Texture Synthesis (Created page with "{{DISPLAYTITLE:Texture Synthesis (Texture Synthesis)}} == Description == Given a texture sample, synthesize a new texture that, when perceived by a human observer, appears to be generated by the same underlying stochastic process. == Parameters == <pre>n: number of pixels</pre> == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | tre...")
  • 10:25, 15 February 2023 Admin talk contribs created page Image Compositing (Created page with "{{DISPLAYTITLE:Image Compositing (Image Compositing)}} == Description == Image compositing is the act of creating a single image from multiple images. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | Petro Vlahos Algorithm || 1985...")
  • 10:25, 15 February 2023 Admin talk contribs created page InDegree Analysis (Created page with "{{DISPLAYTITLE:InDegree Analysis (Link Analysis)}} == Description == A simple heuristic that can be viewed as the predecessor of all Link Analysis Ranking algorithms is to rank the pages according to their popularity (also referred to as visibility (Marchiori 1997)). The popularity of a page is measured by the number of pages that link to this page. We refer to this algorithm as the InDegree algorithm, since it ranks pages according to their in-degree in the graph $G$....")
  • 10:25, 15 February 2023 Admin talk contribs created page All Maximal Non-Branching Paths in a Graph (Created page with "{{DISPLAYTITLE:All Maximal Non-Branching Paths in a Graph (All Maximal Non-Branching Paths in a Graph)}} == Description == A node $v$ in a directed graph $G$ is called a 1-in-1-out node if its indegree and outdegree are both equal to 1, i.e., $in(v) = out(v) = 1$. We can rephrase the definition of a "maximal non-branching path" from the main text as a path whose internal nodes are 1-in-1-out nodes and whose initial and final nodes are not 1-in-1-out nodes. The proble...")
  • 10:24, 15 February 2023 Admin talk contribs created page Weighted Set-Covering (Created page with "{{DISPLAYTITLE:Weighted Set-Covering (The Set-Covering Problem)}} == Description == The set-covering problem where each set $s\in S$ is assigned a weight and the goal is to find the minimum weight sub-collection of $S$ that covers the universe. == Related Problems == Subproblem: Unweighted Set-Covering == Parameters == <pre>n: number of elements in the universe m: number of sets in the collection d: size of the largest set in collection H(x): the xth Harmonic...")
  • 10:24, 15 February 2023 Admin talk contribs created page Unweighted Set-Covering (Created page with "{{DISPLAYTITLE:Unweighted Set-Covering (The Set-Covering Problem)}} == Description == Given a universe $U$, i.e. a set of elements $\{1, 2, \ldots, n\}$, and a collection $S$ of $m$ sets whose union is the universe, identify the smallest sub-collection of $S$ whose union is the universe. == Related Problems == Generalizations: Weighted Set-Covering == Parameters == <pre>U: the universe of elements to be covered S: the collection of sets n: number of elements...")
  • 10:24, 15 February 2023 Admin talk contribs created page Optimal Policies for MDPs (Created page with "{{DISPLAYTITLE:Optimal Policies for MDPs (Optimal Policies for MDPs)}} == Description == In an MDP, a policy is a choice of what action to choose at each state An Optimal Policy is a policy where you are always choosing the action that maximizes the “return”/”utility” of the current state. The problem here is to find such an optimal policy from a given MDP. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" styl...")
  • 10:24, 15 February 2023 Admin talk contribs created page Filtering Problem (Stochastic Processes) (Created page with "{{DISPLAYTITLE:Filtering Problem (Stochastic Processes) (Filtering Problem (Stochastic Processes))}} == Description == The filtering problem is to obtain the best linear estimate $\hat{z}_t$ of $z_t$ based on the past observations ($y_s | s\leq t)$. Abstractly, the solution to the problem of filtering corresponds to explicitly computing $\hat{z}_t = P_t^y(z_t)$ where $P_t^y$ is the projection operator onto the Hilbert space $H_t^y$. == Parameters == No parameters...")
  • 10:24, 15 February 2023 Admin talk contribs created page Culling (Created page with "{{DISPLAYTITLE:Culling (Culling)}} == Description == Culling is the process of rejecting primitives or objects in their entireity before rendering in the case that they would not be shown in the view, reducing unnecessary computations. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | view fru...")
  • 10:24, 15 February 2023 Admin talk contribs created page Blob Detection (Created page with "{{DISPLAYTITLE:Blob Detection (Feature Detection)}} == Description == The regions or points which have noticeable difference with their surroundings is called blob. Blob detection is the problem of detecting such blobs in a given image. == Related Problems == Related: Corner Detection == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! App...")
  • 10:24, 15 February 2023 Admin talk contribs created page Corner Detection (Created page with "{{DISPLAYTITLE:Corner Detection (Feature Detection)}} == Description == Conventionally, a corner is defined as the intersection point or the junction point between two or more straight line edges (i.e. edges which have discontinuities along a straight line). Corner detection is the problem of detecting such corners in a given image. == Related Problems == Related: Blob Detection == Parameters == No parameters found. == Table of Algorithms == {| class="wiki...")
  • 10:24, 15 February 2023 Admin talk contribs created page Matrix Factorization (Created page with "{{DISPLAYTITLE:Matrix Factorization (Collaborative Filtering)}} == Description == Collaborative filtering is a technique used in recommendation systems. It analyzes relationships between users and interdependencies among products to identify new user-item associations. A method of collaborative filtering uses matrix factorization. In its basic form, matrix factorization characterizes both items and users by vectors of factors inferred from item rating patterns. == Pa...")
  • 10:24, 15 February 2023 Admin talk contribs created page Maximum Likelihood Methods in Unknown Latent Variables (Created page with "{{DISPLAYTITLE:Maximum Likelihood Methods in Unknown Latent Variables (Maximum Likelihood Methods in Unknown Latent Variables)}} == Description == In this problem, the goal is to compute maximum-likelihood estimates when the observations can be viewed as incomplete data. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !!...")
  • 10:24, 15 February 2023 Admin talk contribs created page Mesh Parameterization (Created page with "{{DISPLAYTITLE:Mesh Parameterization (Mesh Parameterization)}} == Description == Given any two surfaces with similar topology it is possible to compute a one-to-one and onto mapping between them. If one of these surfaces is represented by a triangular mesh, the problem of computing such a mapping is referred to as mesh parameterization. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width=...")
  • 10:24, 15 February 2023 Admin talk contribs created page Hyperbolic Spline Interpolation (Created page with "{{DISPLAYTITLE:Hyperbolic Spline Interpolation (Hyperbolic Spline Interpolation)}} == Description == The problem of restoring complex curves and surfaces from discrete data so that their shape is preserved is called isogeometric interpolation. A very popular tool for solving this problem are hyperbolic splines in tension, which were introduced in 1966 by Schweikert. These splines have smoothness sufficient for many applications; combined with algorithms for the automat...")
  • 10:24, 15 February 2023 Admin talk contribs created page Record Matching (Redirected page to Duplicate Elimination) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page Object Identification (Redirected page to Duplicate Elimination) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page Instance Identification (Redirected page to Duplicate Elimination) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page De-Duplication (Redirected page to Duplicate Elimination) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page Record Linkage (Redirected page to Duplicate Elimination) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page DAG Realization Problem (Created page with "{{DISPLAYTITLE:DAG Realization Problem (Graph Realization Problems)}} == Description == Given a sequence $S := (a_1, b_1), \ldots, (a_n, b_n)$ with $a_i, b_i \in \mathbb{Z}_0^+$, does there exist a directed acyclic graph (DAG) (no parallel arcs allowed) with labeled vertex set $V := \{v_1, \ldots , v_n\}$ such that for all $v_i \in V$ indegree and outdegree of $v_i$ match exactly the given numbers $a_i$ and $b_i$, respectively? == Related Problems == Generalizations...")
  • 10:24, 15 February 2023 Admin talk contribs created page Digraph Realization Problem (Created page with "{{DISPLAYTITLE:Digraph Realization Problem (Graph Realization Problems)}} == Description == Given a sequence $S := (a_1, b_1), \ldots, (a_n, b_n)$ with $a_i, b_i \in \mathbb{Z}_0^+$, does there exist a directed graph (no parallel arcs allowed) with labeled vertex set $V := \{v_1, \ldots , v_n\}$ such that for all $v_i \in V$ indegree and outdegree of $v_i$ match exactly the given numbers $a_i$ and $b_i$, respectively? == Related Problems == Subproblem: DAG Realiza...")
  • 10:24, 15 February 2023 Admin talk contribs created page Subtree Isomorphism (Created page with "{{DISPLAYTITLE:Subtree Isomorphism (Graph Isomorphism Problem)}} == Description == Determine whether a given tree is contained within another tree. == Related Problems == Generalizations: Largest Common Subtree Related: Graph Isomorphism, General Graphs, Graph Isomorphism, Bounded Number of Vertices of Each Color, Graph Isomorphism, Trivalent Graphs, Graph Isomorphism, Bounded Vertex Valences == Parameters == <pre>n: number of vertices in the...")
  • 10:24, 15 February 2023 Admin talk contribs created page LCST (Redirected page to Largest Common Subtree) Tag: New redirect
  • 10:24, 15 February 2023 Admin talk contribs created page Largest Common Subtree (Created page with "{{DISPLAYTITLE:Largest Common Subtree (Graph Isomorphism Problem)}} == Description == Find a largest tree which occurs as a common subgraph in a given collection of trees. == Related Problems == Generalizations: Graph Isomorphism, General Graphs Subproblem: Subtree Isomorphism Related: Graph Isomorphism, Bounded Number of Vertices of Each Color, Graph Isomorphism, Trivalent Graphs, Graph Isomorphism, Bounded Vertex Valences == Parameters ==...")
  • 10:24, 15 February 2023 Admin talk contribs created page Graph Isomorphism, Bounded Vertex Valences (Created page with "{{DISPLAYTITLE:Graph Isomorphism, Bounded Vertex Valences (Graph Isomorphism Problem)}} == Description == Given two graphs with the degree of each vertex bounded, determine whether they are isomorphic to one another. == Related Problems == Generalizations: Graph Isomorphism, General Graphs Related: Graph Isomorphism, Bounded Number of Vertices of Each Color, Graph Isomorphism, Trivalent Graphs, Largest Common Subtree, Subtree Isomorphism == Par...")
  • 10:24, 15 February 2023 Admin talk contribs created page Graph Isomorphism, Trivalent Graphs (Created page with "{{DISPLAYTITLE:Graph Isomorphism, Trivalent Graphs (Graph Isomorphism Problem)}} == Description == Given two trivalent graphs (AKA cubic graphs--graphs in which each vertex has degree 3), determine whether they are isomorphic to one another. == Related Problems == Generalizations: Graph Isomorphism, General Graphs Related: Graph Isomorphism, Bounded Number of Vertices of Each Color, Graph Isomorphism, Bounded Vertex Valences, Largest Common Subtree,...")
  • 10:24, 15 February 2023 Admin talk contribs created page Graph Isomorphism, Bounded Number of Vertices of Each Color (Created page with "{{DISPLAYTITLE:Graph Isomorphism, Bounded Number of Vertices of Each Color (Graph Isomorphism Problem)}} == Description == Given two colored graphs with the number of vertices of each color bounded, determine whether they are isomorphic to one another. == Related Problems == Generalizations: Graph Isomorphism, General Graphs Related: Graph Isomorphism, Trivalent Graphs, Graph Isomorphism, Bounded Vertex Valences, Largest Common Subtree, Subtree Is...")
  • 10:24, 15 February 2023 Admin talk contribs created page Graph Isomorphism, General Graphs (Created page with "{{DISPLAYTITLE:Graph Isomorphism, General Graphs (Graph Isomorphism Problem)}} == Description == Given two graphs, determine whether they are isomorphic to one another. == Related Problems == Subproblem: Graph Isomorphism, Bounded Number of Vertices of Each Color, Graph Isomorphism, Trivalent Graphs, Graph Isomorphism, Bounded Vertex Valences, Largest Common Subtree Related: Graph Isomorphism, Trivalent Graphs, Graph Isomorphism, Bounded Ve...")
  • 10:24, 15 February 2023 Admin talk contribs created page Arithmetic Expression Binary Tree (Created page with "{{DISPLAYTITLE:Arithmetic Expression Binary Tree (AST to Code Translation)}} == Description == Translate a given arithmetic expression binary tree into machine-readable code that uses as few registers as possible. == Related Problems == Related: AST to Code Translation == Parameters == <pre>$n$: number of nodes in the tree</pre> == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space...")
  • 10:23, 15 February 2023 Admin talk contribs created page AST to Code Translation (Created page with "{{DISPLAYTITLE:AST to Code Translation (AST to Code Translation)}} == Description == Translate a given abstract syntax tree (AST) into machine-readable code that uses as few registers as possible. == Related Problems == Related: Arithmetic Expression Binary Tree == Parameters == <pre>$n$: number of nodes in the tree</pre> == Table of Algorithms == Currently no algorithms in our database for the given problem. == Time Complexity graph == File:AST to Co...")
  • 10:23, 15 February 2023 Admin talk contribs created page Longest Palindromic Substring (Created page with "{{DISPLAYTITLE:Longest Palindromic Substring (Longest Palindromic Substring)}} == Description == Given a string of length $n$, find the palindromic substrings of maximal length. == Parameters == <pre>n: length of given string</pre> == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | Naive (Longest Palindromic Substring Longest Palin...")
  • 10:23, 15 February 2023 Admin talk contribs created page ER (Redirected page to Entity Resolution) Tag: New redirect
  • 10:23, 15 February 2023 Admin talk contribs created page Entity Resolution (Created page with "{{DISPLAYTITLE:Entity Resolution (Entity Resolution)}} == Description == Entity resolution (ER) is the problem of matching records that represent the same real-world entity and then merging the matching records. ER is a well known problem that arises in many applications. An exhaustive ER process involves comparing all the pairs of records, which can be very expensive for large datasets. == Parameters == No parameters found. == Table of Algorithms == {| class="wi...")
  • 10:23, 15 February 2023 Admin talk contribs created page Ray Tracing (Created page with "{{DISPLAYTITLE:Ray Tracing (Ray Tracing)}} == Description == Ray tracing is an image rendering technique in which rays are cast from the viewpoint and followed as they reflect off of objects in the scene. == Parameters == No parameters found. == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Year !! Time !! Space !! Approximation Factor !! Model !! Reference |- | Dürer rendering algorithm ( Ray Tracin...")
  • 10:23, 15 February 2023 Admin talk contribs created page Constructing Suffix Trees (Created page with "{{DISPLAYTITLE:Constructing Suffix Trees (Constructing Suffix Trees)}} == Description == Let $T = t_1 t_2 \cdots t_n, be a string over an alphabet $\Sigma$. Each string $x$ such that $T = uxv$ for some (possibly empty) strings $u$ and $v$ is a substring of $T$, and each string $T_i = t_i \cdots t_n$, where $1 \leq i \leq n + 1$ is a suffix of $T$; in particular, $T_{n+1} = \epsilon$ is the empty suffix. The set of all suffixes of $T$ is denoted $\sigma(T)$. The suffix...")
  • 10:23, 15 February 2023 Admin talk contribs created page Maximum Square Subarray (Created page with "{{DISPLAYTITLE:Maximum Square Subarray (Maximum Subarray Problem)}} == Description == Given an $n \times n$ matrix find a maximum subarray with sides of equal length. == Related Problems == Generalizations: Maximum Subarray Related: 1D Maximum Subarray, 2D Maximum Subarray == Parameters == <pre>n: dimension of array</pre> == Table of Algorithms == Currently no algorithms in our database for the given problem. == Reductions FROM Problem == {| cl...")
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