Words to Describe preprocessing

How preprocessing often is described ("________ preprocessing")

• spatial
• such
• auditory
• text
• cochlear
• data
• necessary
• simple
• adequate
• intelligent
• substantial
• net
• spectral
• automatic
• radiometric
• much
• careful
• specific
• more
• less
• parafoveal
• linguistic
• semantic
• additional
• digital
• sensory
• time
• conventional
• suitable
• little
• appropriate
• automated
• acoustic
• symbolic
• retinal
• image
• costly
• based
• iterative
• mechanical
• minimal
• initial
• above
• further
• basic
• sophisticated
• optical
• expensive
• fourier
• peripheral
• visual
• linear
• finite
• interactive
• line
• considerable
• manual
• adaptive
• neural
• global
• effective
• syntactic
• proper
• offline
• signal
• independent
• nonlinear
• geometric
• selective
• additive
• complicated
• efficient
• special
• significant
• extensive
• elaborate
• local
• conservative
• complex
• level