I am looking for an application or an online service that could basically apply the above mentioned filter or something like to to an existing PDF file ( I do not have the images ) so the document that i have looks like this and i want it to be converted to something like this later.
PS : I did try to find a service an app or a site that can do this for me, but could not find one I know I could do it using Open CV or some other library but i don’t want to code something that long just for this, any and all abstraction and help would be greatly appreciated