Adrian F. Clark
What does Otsu's method do?
minimizes the within-class variance
Which of the following is not a valid equation for a straight line?
the equation $y = m + x - c$
What does one do with the Hough accumulator to find lines?
Each peak in the accumulator is a line in the image
Which of the following is a sensible region descriptor?
the circularity of a region
Why is a recursive region labelling algorithm poor in practice?
it tends to overflow the computer's stack
If a histogram has two peaks, where is the best place to put a threshold to separate foreground from background?
in the bottom of the dip between the two peaks
What is the purpose of the Hough transform?
To find the parameters of lines, etc
In the parametric Hough transform, what is the accumulator array indexed by?
radius and angle
What shape is the curve drawn in the parametric accumulator array from a single pixel in an image?
How many lines are drawn in the parametric accumulator array from a single pixel in an image?
as many as there are angle entries in the accumulator array