task ( part periodic signal )

im so sorry for ask new question but i have atask in my faculty with 10 marks bouns and i need them the task about ( make acode that read any periodic signal in an image like this

and then the code part the periodic signal into a separate signal (it will be display 3 signal)in 3 separate figures (the code not just for this image but for any image periodic signal ) please i need it (help me )

[Wayne King]

What have you done to earn your bonus points?

[ahmed]

i searched everywhere but i didn't find any thing that help me

[Walter Roberson]

How does this differ from your previous question http://www.mathworks.co.uk/matlabcentral/answers/109932-read-a-periodic-image-signal-and-detect-every-wave-then-display-every-wave-on-separte-figure-help-m ?