Apply curve with NConvert?

[stalker]

Hello (X)NConvert users and developers.

I know XnConvert and XnView GUI. I need do some operation in batch, in Linux version of NConvert. Exactly, I want apply a color curve to dozens of images. I found a curve perfect for my needs and... what now? I know I can save it as .xbs file, to check curve parameters. But how to use it with NConvert? Saving as .bat file doesn't help much because curve's parameters aren't included.

Can anyone give me some hints?

[cday]

Not currently supported as far as I know...

But you could request that support be added, and Pierre has been in the past responded to a number of requests to port XnView functions to NConvert, although I'm not sure how easy it would be to add support for the curves function?

[cday]

If you have an immediate need you might check imagemagick which supports more functions, distinguishing between applying a curves adjustment and drawing a curve...

[stalker]

Thank you. I use Imagemagick sometimes but it could be very handy to "design" the curve in XnView and then use it in NConvert.

[cday]

I use Imagemagick sometimes but it could be very handy to "design" the curve in XnView and then use it in NConvert.

Yes, Pierre?

[stalker]

I found another approach, very around, but works. I use Curves action in XnConvert, save preset to .xbs file, read curve(s) parameter, calculate polynomial coefficients using IM and Gnuplot functions described here: https://imagemagick.org/Usage/color_mods/#curves and then use convert to apply the polynomial.

Very simple, isn't it?