Cross Reference: /frameworks/native/docs/images/camera2/metadata/android.tonemap.curveRed

`Name`	`Date`	`Size`
Up to higher level directory
`gamma_tonemap.png`	24-Aug-2016	`30.8K`
`inverse_tonemap.png`	24-Aug-2016	`22.2K`
`linear_tonemap.png`	24-Aug-2016	`21.3K`
`rec709_tonemap.png`	24-Aug-2016	`31.6K`
`srgb_tonemap.png`	24-Aug-2016	`31.6K`