Idea

Convolution is designed to calculate the remaining volume of a system with instable input and stable output.

For example, imagine a person who keeps taking in food all over a day, we define as the amount of food he takes during period , which varies during the day. Besides, we can also define as the ratio of remaining food in the person's stomach after time , that is, if the person takes food at time , then would be the remaining amount of this food at time .

Now we can easily calculate the total remaining amount of food at time by the following integration:

To generalize, convolution can be interpreted as a measure of overlap between and a time-reversed and shifted version of . It provides the accumulated effect of the input function on the system characterized by

Topics

Convolution (Discrete) Convolution (Continuous) Convolution Algebra