Added s-curve contrast option

[refotografia]

This is a version of the original contrast filter, but using s-curve approach.

[brendan-duncan]

Thanks for this!

I'm going to look at adding this code to the existing contrast function, as an option. There's a bunch of other scaffolding that would need to go in for a new function, and it would add to the technical debt.

[refotografia]

You're welcome! If you prefer, i can take a shot using enum in the same way as in the solarize filter.

…

On Sun, 19 May 2024, 04:26 Brendan Duncan, ***@***.***> wrote: Thanks for this! I'm going to look at adding this code to the existing contrast function, as an option. There's a bunch of other scaffolding that would need to go in for a new function, and it would add to the technical debt. — Reply to this email directly, view it on GitHub <#650 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGGZAETP3QAT7SBJ3QQ4XWDZDALUZAVCNFSM6AAAAABHYLNRC6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCMJZGA4DGOBSGA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[brendan-duncan]

That would be great. I was thinking something like
enum ContrastMode { default, scurve } ...
Image contrast(Image src,
{required num contrast,
Image? mask,
Channel maskChannel = Channel.luminance,
ContrastMode mode = ContrastMode.default})