Complex sentence: Second, compound document comparison compares all embedded objects by first marking their original place, and then comparing the objects granularly in their native form on a cell by cell basis for Excel objects and pixel by pixel basis for image objects.
Split into simpler sentences: Second, compound document comparison compares all embedded objects by first marking their original place, and then comparing the objects granularly in their native form. As an example, this may include comparison on a cell by cell basis for Excel objects and pixel by pixel basis for image objects.