Question

In terms of object recognition, the simplest patterns of lines are gratings, which can vary in two dimensions:

Answer 1

In terms of object recognition, the simplest patterns of lines are gratings, which can vary in two dimensions Frequency and contrast

What is Frequency?

• The frequency of a repeated event is its number of instances per unit of time. In some cases, it is also referred to as temporal frequency or ordinary frequency to underline differences with spatial and angular frequencies, respectively.
• One (event) per second is equal to one hertz (Hz), which is how frequency is stated. The period is the reciprocal of the frequency since it is the length of time for one cycle in a repeating occurrence.
• For instance, the period, T—the space between beats—of a heart beating at a frequency of 120 beats per minute (2 hertz), is equal to 0.5 seconds (60 seconds divided by 120 beats).

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