I need to remove background and resize

Hello

I need to remove the background and put a uniform background without noise ....

In addition I also need to resize the canvas (50x50) and place the image centered ...

How could I do it?

Thank you

Attached image

[darova]

Did you try something? What about im2bw?

[Raul Fuentes]

I can't...can you help me??

I neet to do... attached image

Thanks

[darova]

I want you to make some effort. I want some feedback. I want to know that the work i do is helpfull to someone

You know what i mean? Im ideological