Class Threshold

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--Threshold

public class Threshold

extends java.lang.Thread

Threshold is an algorithm to apply thresholding to an image.

Author:

Judy Robertson SELLIC OnLine

See Also:

code.iface.threshold

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Threshold()
Constructs a new Threshold

Method Summary

int[]	flip_the_pixels(int[] src, int w, int h) Turns all the black pixels in the specified image array to white and vice versa
int[]	threshold(int[] src, int width, int height, int value) Applies the thresholding operator with the specified threshold value to the specified image array
int[]	twothreshold(int[] src, int width, int height, int low, int high) Applies the thresholding operator between the specified threshold values to the specified image array

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, run, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

Threshold

public Threshold()

Constructs a new Threshold

Method Detail

threshold

public int[] threshold(int[] src,
                       int width,
                       int height,
                       int value)

Applies the thresholding operator with the specified threshold value to the specified image array

Parameters:

src - pixel array representing image to be thresholded

width - width of the image in pixels

height - height of the image in pixels

value - threshold value

Returns:

a thresholded pixel array of the input image array

twothreshold

public int[] twothreshold(int[] src,
                          int width,
                          int height,
                          int low,
                          int high)

Applies the thresholding operator between the specified threshold values to the specified image array

Parameters:

src - pixel array representing image to be thresholded

width - width of the image in pixels

height - height of the image in pixels

low - lower threshold value

high - higher threshold value

Returns:

a thresholded pixel array of the input image array

flip_the_pixels

public int[] flip_the_pixels(int[] src,
                             int w,
                             int h)

Turns all the black pixels in the specified image array to white and vice versa

Parameters:

src - The black and white pixel array whose values are to be inverted

Returns:

A pixel array which is the negative of the input image