Class SvpTools

java.lang.Object
  |
  +--SvpTools

public class SvpTools

extends java.lang.Object

Constructor Summary

SvpTools()

Method Summary

static double	angleBetween(DPoint v0, DPoint v1) returns the angle, in the range 0 -> PI between the two unit vectors
static double	angleBetweenShifted(DPoint v0, DPoint v1) returns the angle, in the range 0 - PI/2 between the two unit vectors.
static double	distanceBetween(DPoint p1, DPoint p2) returns the distance between the two DPoints
static double	getMeanIntensity(int[][] pixels, DPoint start, DPoint vector, double length, double width) Returns the mean pixel density in the specified region.
static RegionPixelStats	getPixelStats(int[][] pixels, DPoint start, DPoint vector, double length, double width, double slice_size) Breaks the specified region into "slices" based on the slice_size parameter.
static DPoint	unitize(DPoint v) returns unit vector version of the passed vector

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SvpTools

public SvpTools()

Method Detail

getPixelStats

public static RegionPixelStats getPixelStats(int[][] pixels,
                                             DPoint start,
                                             DPoint vector,
                                             double length,
                                             double width,
                                             double slice_size)

Breaks the specified region into "slices" based on the slice_size parameter. Pixel density is computed for each slice, and the mean and standard deviation of those densities is returned in a RegionPixelStats structure.

 
           length
   ________________________    
  |    |    |    |    |    |   ^
  |start     vector        |   |
  *----------------------> | width
  |    |    |    |    |    |   |
  |____|____|____|____|____|   V
            !    !
          slice_size 
 

Parameters:

pixels - the image, passed as a parameter so this method can be static

start - the starting point of the region

vector - a vector in the length-wise direction of the region

length - the length of the rectangular region

width - the width of the rectangular region

slice_size - the width of the slices that the region will be divided into when computing stats (ideally should be 1?)

getMeanIntensity

public static double getMeanIntensity(int[][] pixels,
                                      DPoint start,
                                      DPoint vector,
                                      double length,
                                      double width)

Returns the mean pixel density in the specified region.

           length
   ________________________    
  |                        |   ^
  |start     vector        |   |
  *----------------------> | width
  |                        |   |
  |________________________|   V

 

angleBetween

public static double angleBetween(DPoint v0,
                                  DPoint v1)

returns the angle, in the range 0 -> PI between the two unit vectors

angleBetweenShifted

public static double angleBetweenShifted(DPoint v0,
                                         DPoint v1)

returns the angle, in the range 0 - PI/2 between the two unit vectors. used to determine angle between lines, since the furthest two lines angles can be from each other is PI/2 (perpendicular)

distanceBetween

public static double distanceBetween(DPoint p1,
                                     DPoint p2)

returns the distance between the two DPoints

unitize

public static DPoint unitize(DPoint v)

returns unit vector version of the passed vector