Global illumination algorithms
Path tracing is a computer graphics Monte Carlo method of rendering images of three-dimensional scenes such that the global illumination is faithful to reality. Fundamentally, the algorithm is integrating over all the illuminance arriving to a single point on the surface of an object. This illuminance is then reduced by a surface reflectance function (BRDF) to determine how much of it will go towards the viewpoint camera. This integration procedure is repeated for every pixel in the output image. When combined with physically accurate models of surfaces, accurate models of real light sources (light bulbs), and optically correct cameras, path tracing can produce still images that are indistinguishable from photographs. Path tracing naturally simulates many effects that have to be specifically added to other methods (conventional ray tracing or scanline rendering), such as soft shadows, depth of field, motion blur, caustics, ambient occlusion, and indirect lighting. Implementation of a renderer including these effects is correspondingly simpler. An extended version of the algorithm is realized by volumetric path tracing, which considers the light scattering of a scene. Due to its accuracy, unbiased nature, and algorithmic simplicity, path tracing is used to generate reference images when testing the quality of other rendering algorithms. However, the path tracing algorithm is relatively inefficient: a very large number of rays must be traced to get high-quality images free of noise artifacts. Several variants have been introduced which are more efficient than the original algorithm for many scenes, including bidirectional path tracing, volumetric path tracing, and Metropolis light transport. (Wikipedia).
Graph Data Structure 6. The A* Pathfinding Algorithm
This is the sixth in a series of videos about the graph data structure. It includes a step by step walkthrough of the A* pathfinding algorithm (pronounced A Star) for a weighted, undirected graph. The A* pathfinding algorithm, and its numerous variations, is widely used in applications suc
From playlist Path Finding Algorithms
What is a Path Graph? | Graph Theory
What is a path graph? We have previously discussed paths as being ways of moving through graphs without repeating vertices or edges, but today we can also talk about paths as being graphs themselves, and that is the topic of today's math lesson! A path graph is a graph whose vertices can
From playlist Graph Theory
What is a Path? | Graph Theory
What is a path in the context of graph theory? We go over that in today's math lesson! We have discussed walks, trails, and even circuits, now it is about time we get to paths! Recall that a walk is a sequence of vertices in a graph, such that consecutive vertices are adjacent. A path is t
From playlist Graph Theory
Find the Shortest Path - Intro to Algorithms
This video is part of an online course, Intro to Algorithms. Check out the course here: https://www.udacity.com/course/cs215.
From playlist Introduction to Algorithms
Longest Simple Path - Intro to Algorithms
This video is part of an online course, Intro to Algorithms. Check out the course here: https://www.udacity.com/course/cs215.
From playlist Introduction to Algorithms
Section 4b: Graph Connectivity
From playlist Graph Theory
What is a Walk? | Graph Theory
What is a walk in the context of graph theory? That is the subject of today's math lesson! A walk in a graph G can be thought of as a way of moving through G, where you start at any vertex in the graph, and then move to other vertices through the edges in the graph. In a walk, you are allo
From playlist Graph Theory
In this tutorial I explore the concepts of walks, trails, paths, cycles, and the connected graph.
From playlist Introducing graph theory
What is a Trail? | Graph Theory
What is a trail in the context of graph theory? That is the subject of today’s math lesson! Recall that a walk in a graph G is just any sequence of vertices in G where consecutive vertices are adjacent. A trail is the same thing except with the added restriction that no edge can be travers
From playlist Graph Theory
Jeremy Dubut: Natural homology computability and Eilenberg Steenrod axioms
The lecture was held within the framework of the Hausdorff Trimester Program : Applied and Computational Algebraic Topology
From playlist HIM Lectures: Special Program "Applied and Computational Algebraic Topology"
TU Wien Rendering #33 - Metropolis Light Transport
Metropolis Light Transport is a powerful technique that can outperform the convergence speed of Bidirectional Path Tracing on most difficult scenes (what makes a scene difficult is a story on its own). It promises optimal importance sampling "along multiple steps" in the stationary distrib
From playlist TU Wien Rendering / Ray Tracing Course
TU Wien Rendering #32 - Bidirectional Path Tracing, Multiple Importance Sampling
With a classical unidirectional path tracer, we'll have some scenes where it is difficult to connect to the light source, and therefore many of our computed samples will be wasted. What if we would start not only one light path from the camera, but one also from the light source, and conne
From playlist TU Wien Rendering / Ray Tracing Course
Broadcasted live on Twitch -- Watch live at https://www.twitch.tv/simuleios
From playlist Misc
Flat Entanglement Spectra in Fixed-area Eigenstates of Quantum Gravity - Don Marolf
Workshop on Quantum Information and the Structure of Spacetime Topic: Flat Entanglement Spectra in Fixed-area Eigenstates of Quantum Gravity Speaker: Don Marolf Date: December 4, 2018 For more video please visit http://video.ias.edu
From playlist Workshop on Quantum Information and the Structure of Spacetime
Paths & the Pen tool in Adobe Photoshop Ep17/33 [Adobe Photoshop for Beginners]
In this tutorial I am going to discuss the Pen tool and the concept of paths in Photoshop. I'll be briefly discussing some examples and then demonstrate how the tool works, where you will have the option to follow along have have a go yourself. Enjoy **FYI** In this video tutorial I will
From playlist TastyTuts: Learn Adobe Photoshop | CosmoLearning.org
P Werner - Hybridization expansion based CTQMC
PROGRAM: STRONGLY CORRELATED SYSTEMS: FROM MODELS TO MATERIALS DATES: Monday 06 Jan, 2014 - Friday 17 Jan, 2014 VENUE: Department of Physics, IISc Campus, Bangalore PROGRAM LINK : http://www.icts.res.in/program/MTM2014 The realistic description of materials with strong electron-electro
From playlist Strongly correlated systems: From models to materials
Lecture 19: Variance Reduction (CMU 15-462/662)
Full playlist: https://www.youtube.com/playlist?list=PL9_jI1bdZmz2emSh0UQ5iOdT2xRHFHL7E Course information: http://15462.courses.cs.cmu.edu/
From playlist Computer Graphics (CMU 15-462/662)
Light and the Art of Path Tracing
Path Tracing is a rendering method almost unchallenged at producing photorealistic images. Let's take a little look at it. This was an almost finished 30 minute video, but due to some loss of files near the end of the editing, much of it missing, and this was what I could recover. There a
From playlist Summer of Math Exposition 2 videos
Inkscape Trace Bitmap Tutorial: How to Convert PNG Image or Jpeg to Vector + Remove Background
Inkscape Trace Bitmap Tutorial: How to Convert Jpeg to Vector + Remove Background | Astronaut Mural Inkscape step-by-step beginner, intermediate tutorial on how to create a vector image from a jpeg, PNG, raster image in Inkscape using the Trace Bitmap tool. Follow along in this Inkscape s
From playlist Inkscape Tutorials: Basic Tools and Techniques for Beginners
Proving Parallel Lines with Angle Relationships
👉 Learn about converse theorems of parallel lines and a transversal. Two lines are said to be parallel when they have the same slope and are drawn straight to each other such that they cannot meet. In geometry, parallel lines are identified by two arrow heads or two small lines indicated i
From playlist Parallel Lines and a Transversal