The Option-Command-P-R is a good one. If you have a Macbook Air, using Option will allow you to boot over the network if there’s another computer setup for remote install.

c = cvWaitKey(100);

switch (c)

{

case 30: // up arrow

case ‘U’: // UP

case ‘u’: // up

avgOutput = (InputUnitTwo + InputUnitOne) / 2;

printf(“Avg=%f\n”, avgOutput);

break;

}

Notice that in the case switch, the keyboard ASCII “letters” use a single quote ( ‘U’ ), where as the ASCII “code” is just a decimal (30 for up-arrow).

Here are the other decimal ASCII codes for the non-printable arrow keyboard inputs:

case 28: // right arrow

case 29: // left arrow

case 30: // up arrow

case 31: // down arrow

Here’s how to do it:

1) If System Preferences is open, quit it.
2) Open System Preferences.
3) Hold down Command and Option at the same time and click on “Displays”
(NOTE! This must done on the *first* time you open the displays preference pane after opening system preferences or it wont work. If you’ve already opened Display prefrences without holding cmd and option, quit and try again)
4) That’s it! You should now see a buggy looking “Rotation” option off to the edge of the window. Clicking brings up your options for rotation and actually works!

1. Login to your machine.
2. Navigate to the Apple menu and select System Preferences.
3. This action will launch a System Preferences window.
4. In the System Preferences window, locate the section entitled System.
5. In the System section, locate and click to select the Accounts icon. (It should be the first icon from the left.)
6. This will launch an Accounts window.
7. In the left pane of the Accounts window, locate the Login Options.
   1. If grayed out or dimmed, this task requires authentication.
      1. To Authenticate: click the golden padlock icon at the bottom-left of the Accounts window. This will launch a screen entitled Authenticate.
      2. Enter your Administrator Password and click OK. If the correct password is entered, this will authenticate you and close the window. Once the window closes, Login Options will no longer be dimmed.
8. Select Login Options. This will display your login options in the right pane of the Accounts window.
9. Deselect/Uncheck the first option – Automatically log in as username.
10. Close the Accounts window.
11. Navigate to the Apple menu and select System Preferences. This will re-launch the System Preferences window.
12. Relocate and click to select Accounts icon.
13. Locate and select Login Options (re-authenticate if necessary).
14. Select/Check the first option – Automatically log in as username.
15. From the pull-down menu select your username.
16. A window will appear and prompt you for the password assigned to selected username. Enter the correct password. Please note, if you are completing this step following an admin password reset, please enter your new admin password.
17. Click the OK button to commit the password information and close the window.
18. Close the Accounts window and reboot to verify the automatic login capability.

“If you have used Xcode before you know that when you create a new project the name you give the project is used as the name for the target executable.  But what do you do if you come up with a new name for your application or want to create a similar project with some minor changes.  Well you have two choices.

1.  Rename the entire project.

2.  Rename only the executable.

Renaming a project in Xcode 3.x

This seems like it ought to be a simple process provided by Xcode but it is not.  Here is how to do it.

1.  Copy and rename the project folder

2.  Inside the new project folder rename the files ending in .pch and .xcodeproj

3.  Right click on .xcodeproj file (it is actually a folder) and select show contents. In the contents folder there should be a file ending in .pbxproj. Open This file in you favorite editor and replace all instances of the old project name with the new project name.

4.  Delete the build folder

5.  Open the Renamed Xcode project and right click (Control click) on the Target from the groups and files list. Select Info to open the properties panel.

6.  Click on the build tab the select packaging from the collection pop up menu

7.  Change the value in the product name build setting to the new name.

8.  Do Build Clean all Targets.

Changing the executable name

1. Open the Xcode project and right click (Control click) on the Target from the groups and files list. Select Info to open the properties panel.

2.  Click on the build tab the select packaging from the collection pop up menu

3.  Change the value in the product name build setting to the new name.

4.  Do Build Clean all Targets.”

• Create a new XCode project using the Command Line Utility/Standard Tool template
• Select Project -> Edit Project Settings
• Set Configuration to All Configurations
• In the Architectures section, double-click Valid Architectures and remove all the PPC architectures
• In the Search Paths section set Header Search Paths to /usr/local/include/opencv ( important note: if you installed via MacPorts, /usr/ becomes /opt/ ).
• Close the Project Info window
• Select Project -> New Group and create a group called OpenCV Frameworks
• With the new group selected, select Project -> Add to Project…
• Press the “/” key to get the Go to the folder prompt
• Enter /usr/local/lib (important note: if you installed OpenCV via MacPorts, then this becomes /opt/local/lib )
• Select libcxcore.dylib, libcvaux.dylib, libcv.dylib, libhighgui.dylib, and libml.dylib.
• Click Add
• Uncheck Copy Items… and click Add

Now you should be able to include the OpenCV libraries, compile, and run your project:

To use the libraries, include the required files with standard includes. For example:

#include <cv.h>
#include <highgui.h>

(important note: if you installed OpenCV via MacPorts, then /usr/local/ becomes /opt/local/ )

http://www.macports.org/install.php

Click the “dmg” link for Snow Leopard.

Once downloaded, double-click .dmg file, which will open a folder. Double-click the MacPorts-1.8.2.pkg package, which will install MacPorts.

Open up a NEW terminal window and run “sudo port -v selfupdate”.

Done.

• Start typing the recipient’s address or name in a new message.
• Select the desired address from the auto-complete list as if you’d compose an email to them.
• Click the small down arrow in the recipient.
• Select Remove from Previous Recipients List from the menu.

You can also search for the unwanted address directly in the previous recipients list:

• Select Window | Previous Recipients from the menu in Mac OS X Mail.
• Highlight the address you want to remove.
  • You can highlight multiple addresses by holding down the Command key.
• Click Remove from List.

You can also use the Previous Recipients window to rid the list of old, unused addresses.

• Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
• Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
• Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
• Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
• Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
• Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard

In Leopard, the following keys can be held down while selecting an area (via Command-Shift-4 or Command-Control-Shift-4):

• Space, to lock the size of the selected region and instead move it when the mouse moves
• Shift, to resize only one edge of the selected region
• Option, to resize the selected region with its center as the anchor point