Class MeasureMTF_

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Window
                    |
                    +--java.awt.Frame
                          |
                          +--ij.plugin.frame.PlugInFrame
                                |
                                +--MeasureMTF_

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.event.ActionListener, java.util.EventListener, java.awt.image.ImageObserver, java.awt.MenuContainer, ij.plugin.PlugIn, java.io.Serializable

public class MeasureMTF_

extends ij.plugin.frame.PlugInFrame

implements java.awt.event.ActionListener

This plugin simplifies the task of measuring the Modulation Transfer Function (resolution) of an optical system, given an image of variously sized bar patterns.

This dialog-box-like plugin is based on the PlugInFrame class, and could serve as an example of how to automate repeated measurements.

Reference:

Sitter, D.N., Goddard, J.S., and Ferrell, R.K., (1995), "Method for the measurement of the modulation transfer function of sampled imaging systems from bar-target patterns.", Applied Optics, v. 34 n. 4, pp. 746-751.

Author:

Jeffrey Kuhn, The University of Texas at Austin, jkuhn@ccwf.cc.utexas.edu

See Also:

Serialized Form

Inner classes inherited from class java.awt.Frame

java.awt.Frame.AccessibleAWTFrame

Inner classes inherited from class java.awt.Window

java.awt.Window.AccessibleAWTWindow

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.AWTTreeLock

Field Summary

(package private) boolean	bFirstTopLeft first bar is at the top or on the left
(package private) static boolean	bHasMtfData
(package private) static boolean	bMtfHeadingsCreated Have the column headings in the main measurement window been created?
(package private) boolean	bPlotDFT plot the DFT result?
(package private) java.awt.Button	buttonClearMtf
(package private) java.awt.Button	buttonCreateRoi
(package private) java.awt.Button	buttonFirstBar
(package private) java.awt.Button	buttonMeasureBlack
(package private) java.awt.Button	buttonMeasureMtf
(package private) java.awt.Button	buttonMeasureWhite
(package private) java.awt.Button	buttonNextBar
(package private) java.awt.Button	buttonRecalculate
(package private) java.awt.Button	buttonRetrieveLength
(package private) boolean	bVertical measure vertically?
(package private) java.awt.Checkbox	checkFirstTopLeft
(package private) java.awt.Checkbox	checkPlotDFT
(package private) java.awt.Checkbox	checkVertical
(package private) java.awt.Choice	choiceBarSpacing
(package private) static double	dBARLENGTH distance between each grating in um (micrometers)
(package private) double	dBarSpacing distance between cycles
(package private) double	dBlackLevel measured black bar intensity
(package private) double	dDutyCycle length of white portion/total spacing (i.e.
(package private) double	dKnownLength known length in um (micrometers)
(package private) static double	dMeasuredLength measured length in pixels
(package private) double	dScale calculated scale in pix/um
(package private) double	dWhiteLevel measured white bar intensity
(package private) int	iCyclesToMeasure number of cycles to measure
(package private) int	iLinesToAverage how many lines of pixel data to average for each bar profile
(package private) int	iMeasurementSize total length of profile to measure
(package private) java.awt.Label	labelBlackLevel
(package private) java.awt.Label	labelMeasurementSize
(package private) java.awt.Label	labelScale
(package private) java.awt.Label	labelWhiteLevel
(package private) static int	nHARMONICS number of DFT harmonics to plot
(package private) java.awt.Panel	panel
(package private) java.awt.TextField	textCyclesToMeasure
(package private) java.awt.TextField	textDutyCycle
(package private) java.awt.TextField	textKnownLength
(package private) java.awt.TextField	textLinesToAverage
(package private) java.awt.TextField	textMeasuredLength

Fields inherited from class ij.plugin.frame.PlugInFrame

title

Fields inherited from class java.awt.Frame

base, CROSSHAIR_CURSOR, DEFAULT_CURSOR, E_RESIZE_CURSOR, frameSerializedDataVersion, HAND_CURSOR, icon, ICONIFIED, mbManagement, menuBar, MOVE_CURSOR, N_RESIZE_CURSOR, nameCounter, NE_RESIZE_CURSOR, NORMAL, NW_RESIZE_CURSOR, ownedWindows, resizable, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, serialVersionUID, state, SW_RESIZE_CURSOR, TEXT_CURSOR, W_RESIZE_CURSOR, WAIT_CURSOR, weakThis

Fields inherited from class java.awt.Window

active, dbg, focusMgr, inputContext, inputContextLock, OPENED, ownedWindowList, warningString, windowListener, windowSerializedDataVersion

Fields inherited from class java.awt.Container

component, containerListener, containerSerializedDataVersion, dispatcher, layoutMgr, listeningBoundsChildren, listeningChildren, maxSize, ncomponents, printing, printingThreads

Fields inherited from class java.awt.Component

accessibleContext, actionListenerK, adjustmentListenerK, appContext, background, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, changeSupport, componentListener, componentListenerK, componentOrientation, componentSerializedDataVersion, containerListenerK, cursor, dropTarget, enabled, eventMask, focusListener, focusListenerK, font, foreground, graphicsConfig, hasFocus, height, hierarchyBoundsListener, hierarchyBoundsListenerK, hierarchyListener, hierarchyListenerK, incRate, inputMethodListener, inputMethodListenerK, isInc, isPacked, itemListenerK, keyListener, keyListenerK, LEFT_ALIGNMENT, locale, LOCK, metrics, minSize, mouseListener, mouseListenerK, mouseMotionListener, mouseMotionListenerK, name, nameExplicitlySet, newEventsOnly, ownedWindowK, parent, peer, peerFont, popups, prefSize, privateKey, RIGHT_ALIGNMENT, textListenerK, TOP_ALIGNMENT, valid, visible, width, windowClosingException, windowListenerK, x, y

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

MeasureMTF_()
Constructor.

Method Summary

(package private) double[]	AbsDFT(double[] adX, int iNK) Calculates the magnitude of the Discrete Fourier Transform of an array of values.
void	actionPerformed(java.awt.event.ActionEvent e) Handle button presses, etc.
(package private) void	clearMTF() Clears all MTF values from the ImageJ measurement list.
(package private) void	createROI(ij.ImagePlus imp) Creates a rectangular Region Of Interest that is the right size to perform the profile measurement.
(package private) void	measureMTF(ij.ImagePlus imp) Finds the profile, calculates the DFT of the data, then calculates the MTF for this bar spacing based on the fundamental frequency (zero'th harmonic).
(package private) void	moveROI(ij.ImagePlus imp, double dDistDown, double dDistOver) Moves the current Region Of Interest down by a certain distance in um.
(package private) void	recalculate() Recalculate all parameters from user inputs
(package private) double	sinc(double x) Calculates the sinc function of a number

Methods inherited from class ij.plugin.frame.PlugInFrame

processWindowEvent, run

Methods inherited from class java.awt.Frame

, addNotify, addToFrameList, constructComponentName, finalize, getAccessibleContext, getCursorType, getFrames, getIconImage, getMenuBar, getState, getTitle, initIDs, isResizable, paramString, postProcessKeyEvent, readObject, remove, removeFromFrameList, removeNotify, setCursor, setIconImage, setMenuBar, setResizable, setState, setTitle, writeObject

Methods inherited from class java.awt.Window

addOwnedWindow, addWindowListener, adjustListeningChildren, applyResourceBundle, applyResourceBundle, connectOwnedWindow, dispatchEventImpl, dispose, eventEnabled, getFocusOwner, getGraphicsConfiguration, getInputContext, getListeners, getLocale, getOwnedWindows, getOwner, getToolkit, getWarningString, hide, isActive, isShowing, nextFocus, ownedInit, pack, postEvent, postWindowEvent, preProcessKeyEvent, processEvent, removeOwnedWindow, removeWindowListener, resetGC, setCursor, setFocusOwner, setWarningString, show, toBack, toFront, transferFocus

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyOrientation, checkGD, countComponents, createChildHierarchyEvents, createHierarchyEvents, deliverEvent, dispatchEventToSelf, doLayout, findComponentAt, findComponentAt, findComponentAt, getAccessibleAt, getAccessibleChild, getAccessibleChildrenCount, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents_NoClientCode, getComponents, getInsets, getLayout, getMaximumSize, getMinimumSize, getMouseEventTarget, getPreferredSize, getWindow, insets, invalidate, invalidateTree, isAncestorOf, layout, lightweightPaint, lightweightPrint, list, list, locate, minimumSize, numListening, paint, paintComponents, paintHeavyweightComponents, postsOldMouseEvents, preferredSize, print, printComponents, printHeavyweightComponents, processContainerEvent, proxyEnableEvents, proxyRequestFocus, remove, remove, removeAll, removeContainerListener, setFont, setLayout, update, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, areInputMethodsEnabled, bounds, checkImage, checkImage, checkWindowClosingException, coalesceEvents, contains, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAccessibleIndexInParent, getAccessibleStateSet, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont_NoClientCode, getFont, getFontMetrics, getForeground, getGraphics, getHeight, getInputMethodRequests, getLocation, getLocation, getLocationOnScreen_NoTreeLock, getLocationOnScreen, getName, getNativeContainer, getParent_NoClientCode, getParent, getPeer, getSize, getSize, getToolkitImpl, getTreeLock, getWidth, getWindowForObject, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isEnabledImpl, isFocusTraversable, isLightweight, isOpaque, isRecursivelyVisible, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.awt.MenuContainer

getFont, postEvent

Field Detail

panel

java.awt.Panel panel

textMeasuredLength

java.awt.TextField textMeasuredLength

buttonRetrieveLength

java.awt.Button buttonRetrieveLength

textKnownLength

java.awt.TextField textKnownLength

labelScale

java.awt.Label labelScale

labelWhiteLevel

java.awt.Label labelWhiteLevel

buttonMeasureWhite

java.awt.Button buttonMeasureWhite

labelBlackLevel

java.awt.Label labelBlackLevel

buttonMeasureBlack

java.awt.Button buttonMeasureBlack

textCyclesToMeasure

java.awt.TextField textCyclesToMeasure

choiceBarSpacing

java.awt.Choice choiceBarSpacing

textDutyCycle

java.awt.TextField textDutyCycle

textLinesToAverage

java.awt.TextField textLinesToAverage

labelMeasurementSize

java.awt.Label labelMeasurementSize

checkVertical

java.awt.Checkbox checkVertical

checkFirstTopLeft

java.awt.Checkbox checkFirstTopLeft

checkPlotDFT

java.awt.Checkbox checkPlotDFT

buttonRecalculate

java.awt.Button buttonRecalculate

buttonCreateRoi

java.awt.Button buttonCreateRoi

buttonMeasureMtf

java.awt.Button buttonMeasureMtf

buttonClearMtf

java.awt.Button buttonClearMtf

buttonFirstBar

java.awt.Button buttonFirstBar

buttonNextBar

java.awt.Button buttonNextBar

nHARMONICS

static final int nHARMONICS

number of DFT harmonics to plot

dBARLENGTH

static final double dBARLENGTH

distance between each grating in um (micrometers)

dMeasuredLength

static double dMeasuredLength

measured length in pixels

dKnownLength

double dKnownLength

known length in um (micrometers)

dScale

double dScale

calculated scale in pix/um

dWhiteLevel

double dWhiteLevel

measured white bar intensity

dBlackLevel

double dBlackLevel

measured black bar intensity

iCyclesToMeasure

int iCyclesToMeasure

number of cycles to measure

dBarSpacing

double dBarSpacing

distance between cycles

dDutyCycle

double dDutyCycle

length of white portion/total spacing (i.e. if white=1/4 width and black=3/4 width, Duty Cycle=0.25)

iLinesToAverage

int iLinesToAverage

how many lines of pixel data to average for each bar profile

iMeasurementSize

int iMeasurementSize

total length of profile to measure

bVertical

boolean bVertical

measure vertically?

bFirstTopLeft

boolean bFirstTopLeft

first bar is at the top or on the left

bPlotDFT

boolean bPlotDFT

plot the DFT result?

bMtfHeadingsCreated

static boolean bMtfHeadingsCreated

Have the column headings in the main measurement window been created?

bHasMtfData

static boolean bHasMtfData

Constructor Detail

MeasureMTF_

public MeasureMTF_()

Constructor. Creates the main user interface panel.

Method Detail

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent e)

Handle button presses, etc.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

createROI

void createROI(ij.ImagePlus imp)

Creates a rectangular Region Of Interest that is the right size to perform the profile measurement.

moveROI

void moveROI(ij.ImagePlus imp,
             double dDistDown,
             double dDistOver)

Moves the current Region Of Interest down by a certain distance in um. If we are measuring vertical bars, the ROI is moved to the right instead.

recalculate

void recalculate()

Recalculate all parameters from user inputs

clearMTF

void clearMTF()

Clears all MTF values from the ImageJ measurement list.

measureMTF

void measureMTF(ij.ImagePlus imp)

Finds the profile, calculates the DFT of the data, then calculates the MTF for this bar spacing based on the fundamental frequency (zero'th harmonic).

sinc

double sinc(double x)

Calculates the sinc function of a number

AbsDFT

double[] AbsDFT(double[] adX,
                int iNK)

Calculates the magnitude of the Discrete Fourier Transform of an array of values.