Perhaps you should try some spelling variations:
the preprocessing » the processing (Expand search), their processing (Expand search), image preprocessing (Expand search)
decreased can » decreased mean (Expand search), decreased in (Expand search), decreased and (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
on decreased » in decreased (Expand search), of decreased (Expand search), on deceased (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the decrease the preprocessing ) OR ( decrease on decreased can decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease the preprocessing ) OR ( decrease on decreased can decrease ))*.