[request] want a Function visible() like similar() to differentiate partially visible from fully visible images

Hai Raiman, Now a days all the websites having the css and JavaScript enabled , so that the visibility is adjusted as per their requirement. While we using Sikuli to search a image which is full visible other than partial visible image look like same. Here the similar function capture the partially visible also as it looks like the same image we search.If we adjust the similarity to low it allow non similar image also. Do you understand what I am Asking? Can you add this visible() feature. I know little python if you want my help I am eagerly waiting. I thinking this can be possible ? Is it possible in your Point of View?