# Find the minimum number of arithmetic operations required for 2D Filters [closed]

Find the minimum number of arithmetic operations required for 2D Filters

• What have you found so far, so that we can guide the next steps. And I don't understand the 'dct' tag here – Laurent Duval Dec 5 '20 at 8:36
• Please stop posting your homework problems, that's not what this site is about. – Matt L. Dec 5 '20 at 11:03

For instance in $$f_2$$, computing $$a+3b+5c+3d+e$$ takes 4 adds and 3 multiplies, while $$a+3(b+d)+5c+e$$ takes 4 adds and 2 multiplies only.