Script programmed in python to test the filters of the raspberry pi camera:
#!/usr/bin/env python
#demo raspistill camerapi
#Oscar Gomez Fuente
import os
filters = ['negative', 'solarise', 'whiteboard', 'blackboard', 'sketch',
'denoise', 'emboss', 'oilpaint', 'hatch', 'gpen', 'pastel',
'watercolour', 'film', 'blur', 'saturation', 'colourswap',
'washedout', 'posterise', 'colourpoint', 'colourbalance', 'cartoon' ]
for i in filters :
os.system('raspistill -v -vf -ifx ' + str(i))