Read the values of luminance of the image

Hello

I would like to create a plugin that changes the saturation of an image based on luma values, similar to the curve of Lum VS Sam of Davinci resolve.

How to read the values of luminance of an image? I couldn't find any image manipulation methods in the SDK, but maybe I'm in the right place.

Thank you

To attach the Lum VS DR Sam curve.

lum_vs_sat.png

The SDK API won't let you change individual values in pixels, i.e. what, I should change the saturation of a pixel from its brightness.

The SDK lets you change even develop settings can be changed in the UI (for example an exhibition), via picture: applyDevelopPreset (), the:applyDevelopSettings() papers and LrDevelopController photo.  But none of the sliders in the user interface let you accomplish your purpose, if you can not do with the SDK.

You can write an external editing (for example in C++ or Swift) application which provides such a feature TIFF.  You would be it interface to LR as a 'external editing plugin', as the Nik plugins.   But I don't think that's what you think.

Tags: Photoshop Lightroom

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