boofcv.alg.feature.detect.grid

Class UtilCalibrationGrid

java.lang.Object

boofcv.alg.feature.detect.grid.UtilCalibrationGrid

public class UtilCalibrationGrid
extends java.lang.Object

Various functions for computing calibration grids.

Constructor Summary

Constructors

Constructor and Description
UtilCalibrationGrid()

Method Summary

Methods

Modifier and Type	Method and Description
static int	distanceCircle(int i0, int i1, int size) Distance between two elements in a circular list.
static int	distanceCircle(int i0, int i1, int dir, int size) dist = (dir > 0 ) i1-i0 ? i0-i1; if( dist < 0 ) distance = size+distance;
static georegression.struct.point.Point2D_I32	findAverage(java.util.List<georegression.struct.point.Point2D_I32> contour) Find the average of all the points in the list.
static int	findFarthest(georegression.struct.point.Point2D_F64 a, java.util.List<georegression.struct.point.Point2D_F64> contour)
static int	findFarthest(georegression.struct.point.Point2D_I32 a, java.util.List<georegression.struct.point.Point2D_I32> contour) Returns the index of the point farthest away from the sample point
static int	incrementCircle(int i, int dir, int size) Returns the next point in the list assuming a cyclical list
static java.util.List<georegression.struct.point.Point2D_F64>	rotatePoints(java.util.List<georegression.struct.point.Point2D_F64> points, int numRows, int numCols) Rotates the grid by 90 degrees in the counter clockwise direction.
static java.util.List<georegression.struct.point.Point2D_F64>	rotatePoints(java.util.List<georegression.struct.point.Point2D_F64> points, int numRows, int numCols, int expectedRows, int expectedCols) Automatically checks and adjusts the points.
static int	selectThreshold(boofcv.struct.image.ImageSingleBand image, int[] histogram) Selects a threshold using the image histogram.
static void	sortByAngleCCW(georegression.struct.point.Point2D_F64 center, java.util.List<georegression.struct.point.Point2D_F64> contour) Sorts the points in counter clockwise direction around the provided point

Methods inherited from class java.lang.Object

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

Constructor Detail

UtilCalibrationGrid

public UtilCalibrationGrid()

Method Detail

selectThreshold

public static int selectThreshold(boofcv.struct.image.ImageSingleBand image,
                  int[] histogram)

Selects a threshold using the image histogram.

rotatePoints

public static java.util.List<georegression.struct.point.Point2D_F64> rotatePoints(java.util.List<georegression.struct.point.Point2D_F64> points,
                                                                  int numRows,
                                                                  int numCols,
                                                                  int expectedRows,
                                                                  int expectedCols)

Automatically checks and adjusts the points. if the number of rows/columns are swapped the grid is rotated. If no change is needed the original list is returned. Otherwise null is returned if some failure condition is present.

Parameters:

points - Ordered points in a grid.

numRows - Number of rows in grid.

numCols - Number of columns in grid.

expectedRows - Number of expected rows.

expectedCols - Number of expected columns.

Returns:

Points in the correct order/crientation.

rotatePoints

public static java.util.List<georegression.struct.point.Point2D_F64> rotatePoints(java.util.List<georegression.struct.point.Point2D_F64> points,
                                                                  int numRows,
                                                                  int numCols)

Rotates the grid by 90 degrees in the counter clockwise direction. Useful when the points are organized into a grid that has the number of rows and columns swapped. The returned points will be a grid with the input rows/columns swapped.

Parameters:

points - Ordered points in a grid.

numRows - Number of rows in grid.

numCols - Number of columns in grid.

Returns:

Ordered points.

incrementCircle

public static int incrementCircle(int i,
                  int dir,
                  int size)

Returns the next point in the list assuming a cyclical list

Parameters:

i - current index

dir - Direction and amount of increment

size - Size of the list

Returns:

i+dir taking in account the list's cyclical nature

distanceCircle

public static int distanceCircle(int i0,
                 int i1,
                 int dir,
                 int size)

dist = (dir > 0 ) i1-i0 ? i0-i1; if( dist < 0 ) distance = size+distance;

Parameters:

i0 - First point.

i1 - Second point.

dir - 0 > counting down, 0 < counting up

size -

Returns:

distanceCircle

public static int distanceCircle(int i0,
                 int i1,
                 int size)

Distance between two elements in a circular list. The closest distance in either direction is returned.

Parameters:

i0 -

i1 -

size -

Returns:

findAverage

public static georegression.struct.point.Point2D_I32 findAverage(java.util.List<georegression.struct.point.Point2D_I32> contour)

Find the average of all the points in the list.

Parameters:

contour -

Returns:

sortByAngleCCW

public static void sortByAngleCCW(georegression.struct.point.Point2D_F64 center,
                  java.util.List<georegression.struct.point.Point2D_F64> contour)

Sorts the points in counter clockwise direction around the provided point

Parameters:

center - Point that the angle is computed relative to

contour - List of all the points which are to be sorted by angle

findFarthest

public static int findFarthest(georegression.struct.point.Point2D_I32 a,
               java.util.List<georegression.struct.point.Point2D_I32> contour)

Returns the index of the point farthest away from the sample point

findFarthest

public static int findFarthest(georegression.struct.point.Point2D_F64 a,
               java.util.List<georegression.struct.point.Point2D_F64> contour)