Implementation of a CVPR 2010 paper - "Common Visual Pattern Discovery via Spatially Coherent Correspondences" by Liu and Yan.

[ Codes ]

This implementation is a joint work with Mohsen Ali.

Notes:

• mex CalcAffinityMatrix3.cpp first. This is the code that calculate affinity matrix. It returns matrix A in sparse format and correspondences indices.
• A simple example is in the file "runthisone.m".
• We use vlfeat package to calculate sift.
• There are couple thresholds in the beginning of the file algorithm3.m you can/should play with.
• We borrow the file "plotmatches.m" from the old UCLA sift package to plot the results.

lazyTA is an app I implemented when I first became TA for a class at University of Florida in 2008. I found it very tedious and error-prone to design multiple forms of exam with different permutation of questions and choices and their corresponding solutions manually. lazyTA reads multiple choice questions from a repo file and populates multiple forms of properly formatted latex codes. In particular, lazyTA is capable of the following:

• randomly chooses questions from repo files.
• randomly shuffles the order of the questions.
• shuffles the choices of a question.
• generates multiple form of latexs from the same selected question. The orders questions and choices in each form are completely different.
• allows users to specify group questions. Group questions will remain together after the shuffling.
• allows users to specify questions to be included.

Check out the sources code at https://github.com/chi3x10/lazyTA

B-Spline snake. Final project of Medical Imaging Analysis.

• Source code.
• Presentation.
• README.

Curve Sketcher. (Computer graphics - project 1)

An OpenGL program that render Bezier curve and NURBS. de Casteljau subdivision method was used to render the Bezier curve.

Source code.

• Execute ./run to compile and run the program.
• Drag any control point to change the shape of the curves.
• Dragging a control point with SHIFT key held will change the z coordinate of the control point.
• Press keys 1, 2, 3, or 4 to switch between different rendering mode.

Tetrahedrons. (Computer graphics - project 2)

Three tetrahedrons are linked by their shared vertices.

Source code.

README.

• Execute ./run to compile and run the program.
• Select a tetrahedron, hold the mouse left button and move the mouse around. Different tetrahedron has different movement.
• User can change camera viewing angle by mouse.
• Press key g and then 'space' key to shoot bullets from an edge of a tetrahedron. Press key o to switch to tonado mode.

Head, Face, Mesh and Nurbs (Computer graphics - project 3)

Techniques involved:

• OpenGL related: lighting, Nurbs surface, trimming of nurbs surface, texture mapping, and animation.
• Triangular mesh file(obj).
• Quoternion rotation.

Source code.

README.

• Execute ./run to compile and run the program.
• Please see the README file first.

Understanding Support Vector Machine.

• Source code.

%%SVM training. Return largrange multiplier and biases.

• [error als b0s]= SVM_Simple(data,lbl1,testData,lbl2);

%%SVM testing. Given a collection of largrange multipliers and biases, return index of the testData.

• [index] = SVMTest(Alphas,b0s,data,testData);

%%SVM training scheme by using PCA feature.

• [error Alphas b0s]= SVM_PCA(trainingData,labels1,testData,labels2,eval,evec,means);

%%SVM training scheme by using original features and edge histogram feature.

• [error Alphas b0s]= SVM_Simple(trainingData,labels1,testData,labels2);

A MIPS simulator. (Computer Architecture - final project)

• Source code.
• Download, decompress and make.
• Run "MIPSsim fibonacii.bin output.txt". A cycle by cycle CPU status will be recorded in the output.txt file.