Https://www.educative.io/courses/intro-deep-learning/the-principles-of-the-convolution

[Vikrant]

Team, check the image uploaded
f * g is stated as dot product. It is a dot product or a scalar multiplication, which is displayed in the image ? a * 1 + b * 4 + c * 7 and so on .
The dot product of two matrices is the product between the rows of the first matrix and the columns of the second matrix.
Could you check and revert ?

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Course: Introduction to Deep Learning & Neural Networks - Learn Interactively
Lesson: The Principles of the Convolution - Introduction to Deep Learning & Neural Networks

[Sami_Muzzamil]

Hi Vikrant!
The operation described in the lesson is convolution which is carried out by element-wise multiplication of two matrices, followed by summing the result to a get a single number. One matrix is the convolution filter and the other is a part of the image of the same size as the convolution filter.

The term dot product is used here because, If both matrices are unpacked as vectors, then this operation is the dot product of the vectors.