Yen-Yu Chang

Graphics: Shading

Mon, 23 Mar 2015 00:00:00 +0000

Shading refers to depicting depth perception in 3D models or illustrations by varying levels of darkness. In computer graphics, shading refers to the process of altering the color of an object in 3D scene, based on its angle to lights and its distance from lights to create a photorealistic effect.

Graphics: Understanding Local Reflectance Model

Sun, 22 Mar 2015 00:00:00 +0000

Illumination and reflectance over objects makes image looks real, since light-material interaction in real world caused each point of the object have different colors and shades.This post is written to discuss some factors about illumination and reflectance models(global, local, etc.), and explore how computer graphic deals with illumination and reflectance of objects.

Druid: A Real-time Analytical Data Store

Sun, 15 Mar 2015 00:00:00 +0000

Druid is an open source data store designed for real-time exploratory analytics on large data sets. The system combines a column-oriented storage layout, a distributed, shared-nothing architecture, and an advanced indexing structure to allow for the arbitrary exploration of billion-row tables with sub-second latencies.

Dynamo: Amazon's Highly Available Key value Store

Mon, 09 Mar 2015 00:00:00 +0000

Dynamo is a highly available key-value storage system built by Amazon. It sacrifices a consistency under certain failure scenarios, makes extensive use of object versioning and application-assisted conflict resolution in a manner that provides a novel interface for developers to use.

Terminal Configuration

Mon, 02 Mar 2015 00:00:00 +0000

This Post is just used for keeping personal configuration files online

Delay Scheduling: A Simple Technique for Achieving Locality and Fairness in Cluster Scheduling

Sun, 01 Mar 2015 00:00:00 +0000

This is a paper motivated by the scheduling problem raised in traditional FIFO strategy in data-intensive cluster computing system.

The proposed methodology is designed to get a good tradeoff point between the conflicts of fairness and data locality, which practically improve response time for small jobs by 5x in a multi-user workload and double throughput in an IO-heavy workload.

A Closed-From Solution to Natural Image Matting

Wed, 25 Feb 2015 00:00:00 +0000

This article is a summary for PAMI 2013 paper - A closed-form solution to natural image matting.

Spark : Resilient Distributed Dataset for efficient in memory computing

Mon, 23 Feb 2015 00:00:00 +0000

This article is basically a high level summary for a 3 minutes presentation that lead the audience to have a intuition about what Spark is and how it achieve efficient and fault-tolerant in-memory computing.