11. Quiz: Histogram Bins

Histograms

HOG is just one example of a feature detection algorithm that uses histograms to organize image data! You can also imagine creating histograms of color, to identify prominent colors in an image, or histograms of object area or contour features. In this quiz, we'll investigate why histograms are so useful in forming feature vectors.

Why use bins?

Histograms are often used in forming useful features because of how they divide data into ranges using bins. Why are bins so useful in creating good features? Select all answers that apply.
SOLUTION:
  • Bins reduce the dimensionality of data; they represent image data in a more compact way.
  • Grouping data into ranges allows for more flexibility in identifying similar objects based on their feature vectors.

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