Does the size of the feature map always reduce upon applying the filters? Explain why or why not

Data Science, AI and ML
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#1

No, the convolution operation shrinks the matrix of pixels(input image) only if the size of the filter is greater than 1 i.e, f > 1.

When we apply a filter of 1×1, then there is no reduction in the size of the image and hence there is no loss of information.