1. Hough Transform

2. Detecting Lines Hough transform detects lines in images Equation of line is: y = mx + b or Hough transform uses an array called accumulator. Size of accumulator is the size of the variables.

3. Detecting Lines For each data point, a number of lines are plotted going through it, all at different angles. These are shown here as solid lines. For each solid line a line is plotted which is perpendicular to it and which intersects the origin. These are shown as dashed lines. The length and angle of each dashed line is measured. In the diagram above, the results are shown in tables. This is repeated for each data point. A graph of length against angle, known as a Hough space graph, is then created. http://en.wikipedia.org/wiki/Hough_transform

4. Detecting Lines http://en.wikipedia.org/wiki/Hough_transform

5. Detecting Lines http://en.wikipedia.org/wiki/Hough_transform