Athento allows detecting the blank percentage in a document. This is done with the Extract pages blank percentage operation (op_extract_blank_pages).
When the system finds too much empty space, for example, it detects that the page is 99% blank. In the above screenshot, you can see how Athento analyzes the content of a document that has 3 pages. The first page of the document is practically blank (99.863% of the document is blank). It is possible to set a blank threshold to eliminate blank pages. For example, you can set the system to delete a page if the page is more than 99% blank.