Perhaps you should try some spelling variations:
image preprocessing » image processing (Expand search), images processing (Expand search), data preprocessing (Expand search)
increase image » increasing image (Expand search), increased damage (Expand search), increase impact (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and increase » and increases (Expand search), and increased (Expand search)
decrease can » decrease in (Expand search), decrease at (Expand search), decrease on (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
decrease l » decrease il (Expand search), decrease _ (Expand search), decrease β (Expand search)
l decrease » _ decrease (Expand search), α decrease (Expand search), to decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease AND increase image preprocessing ) OR ( decrease l decrease can decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and increase image preprocessing ) OR ( decrease l decrease can decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and increase image preprocessing ) OR ( decrease l decrease can decrease ))*.