Square Root of Negative One

acquiring google map api key

Posted in android, coding by cheng on November 14, 2010

1. run cmd
navigate to D:\Program Files\Java\jdk1.6.0_22\bin in cmd line
(to change root directory- d: )

2. find the keystore file
assume it is in C:\Users\[useraccount]\.android\

3. run keytool
in cmd line, type in
keytool -list -alias androiddebugkey -keystore C:\Users\[useraccount]\.android\debug.keystore -storepass android -keypass android

4. For reference on API –
http://code.google.com/android/add-ons/google-apis/reference/index.html

Example Using Google Maps in Android
http://www.devx.com/wireless/Article/39145/1954

video processing

Posted in coding by cheng on April 5, 2010

software

1. frame by frame motion detection (FD)

2. background substraction (BD)

3. with some noise threathhold

0.1*FD + 0.9* BD  = GD

dilate -fix holes..

erode -cut the outline

4. contour finder

hardware

projector projects no infrared light. nor fluorescent lights.  therefore, by using exposed b+w film as filter on monochromic camera, we can avoid feedback problem of projected image.

BNC connector + mechanical convertar ->  RCA connector -> computer

super circuit camera connector + clamp to mount it anywhere

KJ’s project?