14 posts in this category
Note on MiniMax (Updating) Motivation This is a very traditional way of solving turn based game like chess or tic-tac-toc. It’s climax is Deep Blue AI in playing chess. Note, some people think about GAN training procedure as a min-max game between G and D, which is also interesting.
May 18, 2020
Note on Photometric Reasoning Shape $\hat n$, lighting $l$, reflectance $\rho$ affect image appearance $I$. Can we infer them back? $$ I=\rho<\hat n,l> $$ How much does shading and photometric effects tell us about shape, in natural settings.
Mar 17, 2020
Note on Hardware Based Computational Photography Now we have far more computational power than before! Besides, many images will go through complex algorithms as postprocessing. But we can also optimize camera measurement, so that results look even better.
Feb 27, 2020
Computational Photography TOC {:toc} Basically, enhance image by computation! Intersection of 3 fields Optics Vision Graphics Majorly two kinds of work Co-design camera and image processing (optics + vision) Use Vision to help Graphics to help generate better image faster! CG2REAL CG rendering is very computational intensive!
Motivation This is a brief analytical note about how physical self movement of eye / camera will induce optic flow in a static environment. And then discuss how a system can separate these two components instantaneously.
Feb 17, 2020
Stereo Basic Stereo algorithm can be formulated as Markov Random Field. Thus Methods in MRF inference could all be used. Prior Planar Prior Natural scene is usually piece-wise! How to impose this idea to depth map?
Feb 4, 2020
Semantics Vision Task Note semantics and geometric reasoning is conceptually similar to each other Stereo and Optical flow is about finding correspondence / matches. Object recognition in some sense is finding correspondence w.r.t. a template, and make the template match the observation. Semantic Vision before CNN So ancient semantic detector works like this
TOC {:toc} Continuing Image Prior and Generative Model . Probabilistic Graphic Model comes into scene, when we want to model and deal with some complex distribution over many variables. When we start to add structure into the model, not everything depend on everything, then the dependency relationship among variables emerges as a graph structure.
Jan 28, 2020
Note on Advanced Computer Vision This is the course note for Advanced Computer Vision Class (CS 659a) These are links to notes for individual modules and specific domain notes. Basic Computer Vision
Jan 20, 2020
Image Prior: Modeling Spatial Relaionship Materials: https://www.cse.wustl.edu/~ayan/courses/cse659a/lec1.html#/ TOC {:toc} This is the basis for most further applications We need Regularizer for a spatial configuration $$\hat X=\arg\min_X \phi(X)+R(X)\\$$This could be interpreted in a Bayesian way,
Jan 14, 2020