7. The tangible non-transitory computer-readable media of claim 6 , wherein the entropy values for each portion of the first electronic document are each based at least on a number of document objects within the respective portion of the first electronic document.
7. The tangible non-transitory computer-readable media of claim 6 , wherein the entropy values for each portion of the first electronic document are each based at least on a number of document objects within the respective portion of the first electronic document. 10. The tangible non-transitory computer-readable media of claim 7 , further comprising: defining a document object model tree based at least in part on parsing the document objects; and determining a depth of document objects for particular pixels intersected by each of the first line and the second line.