apcs-k/per6-chen-dong-webcamarcade

Games that involve image processing through the webcam

Webcam-Arcade

Games that involve image processing through the webcam.

Instructions

• Compile using "javac -cp .:libs/* *.java" or "javac -cp .;libs/* *.java" on Windows machines
• Run the program with "java -cp .:libs/* Driver" or "java -cp .;libs/* Driver"
  • It is expected for terminal to default to a no-operation implementation
• Get a distinct color that you wish to track, preferably a light source and cover the entire square in the center. Press any button to begin tracking this color
  • You may press any key besides the following keys to track a new color
• Switch between screens with the following keys:
  • Press S to enter the Setup Screen (Default Screen)
  • Press D to enter the Draw Screen
  • Press P to enter the Pong Screen

Drawing

• Once you enter the draw screen, press any key besides 'z' and 'r' to draw a rectangle
• Draw screen supports undo and redo. Press z to undo and r to redo

Pong

Classes, Algorithms, Data Structures, etc...

Hierarchy and Class Descriptions

Driver

• Entrance to the program
• Creates The WebcamPanel, SetupScreen, etc...
• Has a stack of screens
  • peek() the top of the stack and pass down the method paintImage(), which is like a while loop (more like a thread that is constantly updated in the WebcamPanel)

Screen

• Interface
• Describes general methods that screens should have. Look into code for more info

SetupScreen

• Records the color of the object to be tracked
• Allows the user to test if the color is distinct enough before selecting a different screen

DrawScreen

• Allows the user to draw
• Contains a LinkedList of history of commands and a Stack of optional redo commands

PongScreen

• Classic Pong game

Algorithms

Mean Shift Algorithm

• Separate colors into RGB (red green blue)
• Find the weighted mean of all the colors in a Rectangle, then move to that mean
  • The weight is given by w = e^(-k*Distance(colorTracked, colorPixel)^2)
  • Credits to cmsoft.com and its color tracking case study

Undo/Redo in DrawScreen

• All commands are added to the end of the linkedlist (like a stack, but we need to iterate through the list to draw the rectangles)
• Any undo commands are pushed onto a redo stack