Artificial Intelligence

• unix_ten_commands.pdf
• vim kate gedit xterm ssh

Machine Learning

• neural network
• weights
• layers
• activation function sigmoid
• error
• finite differences
• negation_learning.gif
• or_learning.gif
• xor_learning.gif
• or
• ten thousand epochs
• initial w0 bias -8
• initial w1 w2 4
• plot error w0 w1
• gnuplot demo
• and
• one thousand epochs
• initial w0 bias -4
• initial w1 w2 -2
• plot error w0 w1
• models.pdf
• learning.pdf
• google_binary_SHELL.py.txt
• Wikipedia - 25 April 2013
  • Perceptron
  • Feedforward_neural_network
  • Artificial_neural_network
  • Multi-layer_perceptron
  • 8 May 2013
    • Delta rule
    • Backpropagation
  • Hopfield_network

Constraint Solvers

• Map Coloring
• states_48.txt
• aus.svg (modified) original (external)
• aus2.svg (solution)
• United States SVG (external)
• Sudoku
• easy.txt
• bot50.txt
• al_escargot.txt
• top95.txt

Spring 2013

• Image Processing Computer Vision
• bitmap PPM color PGM grayscale
• lena_rgb_p3.ppm
• katrina-08-28-2005.jpg katrina.ppm
• PPM text P3 binary P6
• PGM text P2 binary P5
• Format
  • filetype (P3, P6, P2, P5)
  • numcols
  • numrows
  • maxval (usually 255)
  • pixel values... (in row major order)
• Data is tokenized by whitespace, otherwise spacing is irrelevant.
• Each pixel is three ints (RGB for PPM) or one int (grayscale for PGM).
• Advice... just use PPM and set R=G=B for grayscale (check file size).
• Avoid binary files (P6 and P5) even though bytes are 2 or 3 or 4 to 1.
• convert -compress None blah.jpg blah.ppm
• img0 - original source image
• img1 - convert RGB to grayscale = 0.30*red + 0.59*green + 0.11*blue
• img2 - smooth grayscale values for all non-border pixels by a weighted average of nearest neighbors
• img3 - calculate G=|Gx|+|Gy| for all non-border pixels and color as red those that surpass a particular threshold
• img4 - nonmaximal supression to reduce computation for data-intensive feature identification
• img5 - color as green the most likely circle (first test on hand-drawn circle triangle square image)

Temporary Archive of Fall 2012

• link
• As of 28 January 2013.