ohmm
Class CvDemo

java.lang.Object
  ohmm.CvBase
      ohmm.CvDemo

public class CvDemo
extends CvBase

Demo of CvBase.

The main action is in process(com.googlecode.javacv.cpp.opencv_core.IplImage). Also shows how to handle custom command line parameters and mouse and key events.

Author:

Marsette A. Vona

Field Summary

protected boolean	allDone Time to quit?
static java.lang.String	APPNAME Application name.
static int	DEF_MAX_FPS Default max FPS.
protected int[]	dumpXY Clicked pixel coords pending RGB dump, or -1 if none.
protected com.googlecode.javacv.cpp.opencv_core.IplImage	procImg Processed image buffer, allocated on first call to process(com.googlecode.javacv.cpp.opencv_core.IplImage).

Fields inherited from class ohmm.CvBase

appname, brightness, canvasFrame, canvasFrameKeyEvent, cap, CAP_PROP_NAMES, CAP_PROPS, capImage, dbg, DEF_APPNAME, DEF_CAM_H, DEF_CAM_W, DEF_INPUT, DEF_MIN_DELAY_MS, DEF_SERVER_FPS, DEF_SERVER_PORT, DEF_USE_CANVAS_FRAME, DEF_USE_CONSOLE, DEF_USE_SERVER, DEF_USE_WINDOW, enableExit, exposure, FMT, frameEndMS, frameN, gain, grabber, height, hue, maxFPS, minDelayMS, mouseCallback, msgStream, msPerTick, paused, procImage, saturation, saveImage, server, serverFPS, serverImage, serverKey, serverPort, streamIndex, useCanvasFrame, useConsole, useServer, useWindow, V4L2_AUTO_PROP_NAMES, V4L2_AUTO_PROP_OFF_VALS, V4L2_AUTO_PROP_ON_VALS, V4L2_AUTO_PROPS, V4L2_CID_AUDIO_BALANCE, V4L2_CID_AUDIO_BASS, V4L2_CID_AUDIO_LOUDNESS, V4L2_CID_AUDIO_MUTE, V4L2_CID_AUDIO_TREBLE, V4L2_CID_AUDIO_VOLUME, V4L2_CID_AUTO_WHITE_BALANCE, V4L2_CID_AUTOGAIN, V4L2_CID_BACKLIGHT_COMPENSATION, V4L2_CID_BASE, V4L2_CID_BLACK_LEVEL, V4L2_CID_BLUE_BALANCE, V4L2_CID_BRIGHTNESS, V4L2_CID_CAMERA_CLASS, V4L2_CID_CAMERA_CLASS_BASE, V4L2_CID_CONTRAST, V4L2_CID_DO_WHITE_BALANCE, V4L2_CID_EXPOSURE, V4L2_CID_EXPOSURE_ABSOLUTE, V4L2_CID_EXPOSURE_AUTO, V4L2_CID_EXPOSURE_AUTO_PRIORITY, V4L2_CID_FOCUS_ABSOLUTE, V4L2_CID_FOCUS_AUTO, V4L2_CID_FOCUS_RELATIVE, V4L2_CID_GAIN, V4L2_CID_GAMMA, V4L2_CID_HCENTER_DEPRECATED, V4L2_CID_HFLIP, V4L2_CID_HUE, V4L2_CID_HUE_AUTO, V4L2_CID_LASTP1, V4L2_CID_PAN_ABSOLUTE, V4L2_CID_PAN_RELATIVE, V4L2_CID_PAN_RESET, V4L2_CID_POWER_LINE_FREQUENCY, V4L2_CID_POWER_LINE_FREQUENCY_50HZ, V4L2_CID_POWER_LINE_FREQUENCY_60HZ, V4L2_CID_POWER_LINE_FREQUENCY_DISABLED, V4L2_CID_PRIVATE_BASE, V4L2_CID_RED_BALANCE, V4L2_CID_SATURATION, V4L2_CID_SHARPNESS, V4L2_CID_TILT_ABSOLUTE, V4L2_CID_TILT_RELATIVE, V4L2_CID_TILT_RESET, V4L2_CID_USER_BASE, V4L2_CID_USER_CLASS, V4L2_CID_VCENTER_DEPRECATED, V4L2_CID_VFLIP, V4L2_CID_WHITE_BALANCE_TEMPERATURE, V4L2_CID_WHITENESS, V4L2_CTRL_CLASS_CAMERA, V4L2_CTRL_CLASS_MPEG, V4L2_CTRL_CLASS_USER, V4L2_EXPOSURE_APERTURE_PRIORITY, V4L2_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, V4L2_EXPOSURE_SHUTTER_PRIORITY, v4l2Auto, warnStream, width

Constructor Summary

CvDemo()
Sets APPNAME and DEF_MAX_FPS.

Method Summary

protected void	cmdHelpExt() Help for the extra command line parameter.
protected java.lang.String	cmdHelpExtParams() Shows the extra command line parameter.
protected boolean	doneProcessing() Are we allDone?
protected void	guiHelpExt() Help for the extra GUI keyboard commands.
protected boolean	handleKeyExt(int code) Handle our custom keypresses.
protected void	handleMouse(int event, int x, int y, int flags) Show pixel color at mouse click.
int	initExt(int argc, java.lang.String[] argv, int ate) Handle extra command line parameters.
static void	main(java.lang.String[] argv) Program entry point.
protected com.googlecode.javacv.cpp.opencv_core.IplImage	process(com.googlecode.javacv.cpp.opencv_core.IplImage frame) Shows how to do image processing.
void	release() Releases allocated memory.

Methods inherited from class ohmm.CvBase

camIndexOptional, cmdHelp, dumpCaptureProperties, finalize, fmt, getCaptureProperty, getDefAppname, getDefInput, guiHelp, handleKey, handleMouse, init, init, init, init, mainLoop, makeGrabber, makeServer, mouseEventToString, msg, nowMS, save, setCaptureProperty, updateServerImage, v4l2DisableAuto, v4l2EnableAuto, v4l2GetExposure, v4l2SetExposure, waitForKeypresss, warn

Methods inherited from class java.lang.Object

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

Field Detail

DEF_MAX_FPS

public static final int DEF_MAX_FPS

Default max FPS.

See Also:

Constant Field Values

APPNAME

public static final java.lang.String APPNAME

Application name.

See Also:

Constant Field Values

allDone

protected boolean allDone

Time to quit?

dumpXY

protected int[] dumpXY

Clicked pixel coords pending RGB dump, or -1 if none.

procImg

protected com.googlecode.javacv.cpp.opencv_core.IplImage procImg

Processed image buffer, allocated on first call to process(com.googlecode.javacv.cpp.opencv_core.IplImage).

Constructor Detail

CvDemo

public CvDemo()

Sets APPNAME and DEF_MAX_FPS.

Method Detail

cmdHelpExt

protected void cmdHelpExt()

Help for the extra command line parameter.

Overrides:

cmdHelpExt in class CvBase

cmdHelpExtParams

protected java.lang.String cmdHelpExtParams()

Shows the extra command line parameter.

Overrides:

cmdHelpExtParams in class CvBase

guiHelpExt

protected void guiHelpExt()

Help for the extra GUI keyboard commands.

Overrides:

guiHelpExt in class CvBase

process

protected com.googlecode.javacv.cpp.opencv_core.IplImage process(com.googlecode.javacv.cpp.opencv_core.IplImage frame)

Shows how to do image processing.

Overrides:

process in class CvBase

Returns:

the processed image, null will cause image display to be skipped for this frame

doneProcessing

protected boolean doneProcessing()

Are we allDone?

Overrides:

doneProcessing in class CvBase

Returns:

true iff main loop should end

Default impl returns false.

handleKeyExt

protected boolean handleKeyExt(int code)

Handle our custom keypresses.

Overrides:

handleKeyExt in class CvBase

handleMouse

protected void handleMouse(int event,
                           int x,
                           int y,
                           int flags)

Show pixel color at mouse click. Chains to default impl to show debug info about mouse events.

Overrides:

handleMouse in class CvBase

Parameters:

event - one of the CV_EVENT_* constants (see opencv_highgui.java in the JavaCV sources for a list)

x - the x pixel coordinate of the mouse event

y - the y pixel coordinate of the mouse event

flags - bitmask of the CV_EVENT_FLAG_* constants (see opencv_highgui.java in the JavaCV sources for a list)

Default impl prints a message using CvBase.mouseEventToString(int, int, int, int) except for CV_EVENT_MOUSEMOVE.

Overriding this is one way that subclasses can handle mouse events.

release

public void release()

Releases allocated memory.

Overrides:

release in class CvBase

initExt

public int initExt(int argc,
                   java.lang.String[] argv,
                   int ate)

Handle extra command line parameters.

Overrides:

initExt in class CvBase

ate - the number of command line arguments already eaten by CvBase.init(int, String[])

Returns:

the total number of arguments eaten

main

public static void main(java.lang.String[] argv)

Program entry point.