Perhaps you should try some spelling variations:
imagem processing » image processing (Expand search), images processing (Expand search), imaging processing (Expand search)
decrease faster » decrease after (Expand search), decrease further (Expand search), decreased after (Expand search)
decrease imagem » decrease age (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
ratio decrease » rapid decrease (Expand search), ratio increase (Expand search), brazil decrease (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease faster decrease imagem processing ) OR ( decrease ratio decrease rate decrease ))~.