input: [0] f [Values] too many to mention [Meaning] Let’s you apply image filters to change the resized picture. For instance you can change brightness/ contrast or even blur the image [Parameter] 
output: filters
options: s o u r c e
options: w i d t h
options: h e i g h t
options: q u a l i t y
options: a l i g n m e n t
options: z o o m / c r o p
options: f i l t e r s
options: s h a r p e n
options: c a n v a s c o l o u r
options: c a n v a s t r a n s p a r e n c y