Tzu Yen's Matlab Codes

Little tool codes:

  logfile - log the time-taking batch operation into a text file
 
  data logged include: 
  start & end time, operation & comment, files processed
  
  Usage: 
          logfile(startTime,operationComment,operation,processed)

  showprogress - show batch processing progress in image window with text
                 program has 3 parts, 
                    1. initialisation before entering the for loop
                    2. actual running in the for loop
                    3. wrapping up after the for loop
 
  Usage:   showprogress(part,range,current,figNo,imsize)

  addgrid - add a matrix with grid lines of a certain value
 
  Usage: 
        gridMatrix = addgrid(cleanMatrix,rowIndex,colIndex,gridValue)

  cleangrid - clean up matrix with grid line of same value
 
  Usage: 
        [cleanMatrix,rowIndex,colIndex] = cleangrid(gridMatrix,gridValue)

  addLocationbar - add a location bar at the bottom of an image
 
  Usage:   locationbar=addLocationbar(im,current,range,barH,posW,bgColor,fgColor)

  outlierRemoveT:  outlier removal using delaunay triangulation for localisation
                   triangle flip and displacement magnitude & direction to determine outlier

  Usage:      [xy1_or,xy2_or] = outlierRemoveT(xy1,xy2,figNo,im1,im2,debug)

Graphics/Vision

  triftensor:   This function computes the trifocal tensor from 7 or more matching points in
           three images.  This code follows the normalised linear algorithm and 
           algebraic minimization algorithm given by Hartley and Zisserman p393 (2nd Ed).

  Usage:   [T, e2, e3] = triftensor(x1, x2, x3)

  makeC:   This function is use to calculate camera calibration matrix 
             from modelling software anim8or's camera 
           pos and pyr are the camera location and orientation wrt the world coordinate.
           For information about anim8or free modelling software, see www.anim8or.com

  Usage:      [C,U,Tcru,im] = makeC(pos,pyr,fov,imWH,fig,points,name)

  triRigidTrans - triangle tranformation as Rigid as possible, 
                    also called "Least distortion" 
                  the idea is to extract out the rotation component Rnf
                    and interpolate the rotation in angle.

  Usage:       [T,Tdecomp,elements,ABCforPlot] = triRigidTrans(ABC,abc,figNo,infoOn)

   perspRect - this function let the user choose a perspectively distorted 
               rectangular region and rectified the image back to a
               rectangle.
 
   Usage:       imRect = perspRect(im,sze,option)
 

• Cmatscii - Function to generate Chinese character image, like ASCII arts
  
• setUpCmatscii - Function to setup character database for Chinese ascii art, it uses:
  
  • countgrid - Function to clean up a text image and estimate text size
    
  • characterise - Function to decompose text picture into characters & intensity in a data structure
    
  • makeLookUp - Function to organise look up table from grayvalue to characters
    
• CmatsciiEx - Example of generating a Chinese ascii art, need chinesetext1.png, chinesetext2.png and monalisa.png

• Chinese Simplified
• Chinese Traditional
• English

Tzu Yen Wong

School of Computer Science & Software Engineering
The University of Western Australia
Crawley, Western Autralia. 6009

Homepage: http://www.csse.uwa.edu.au/~wongt

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Tzu Yen Wong's Blog, Lalilaza Daily