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I convert Image into CIELab color space. After that I split Image into 3 channels are Lightness,a,b . So I have 2 questions

1. How can I decompose Lightness channel into Detail Layer.
2. Assume I have a new Detail Layer. How can I combine with Lightness,a,b channels.

Thanks you.

I convert Image into CIELab color space. After that I split Image into 3 channels are Lightness,a,b . So I have 2 questions

1. How can I decompose Lightness channel into Detail Layer.
2. Assume I have a new Detail Layer. How can I combine with Lightness,a,b channels.

for example below

Thanks you.

I convert Image into CIELab color space. After that I split Image into 3 channels are Lightness,a,b . So I have 2 questions

1. How can I decompose Lightness channel into Detail Layer.
2. Assume I have a new Detail Layer. How can I combine with Lightness,a,b channels.

for This is an example below detail layer.

Thanks you.

I convert Image into CIELab color space. After that I split Image into 3 channels are Lightness,a,b . So I have 2 questions

1. How can I decompose Lightness channel into Detail Layer.
2. Assume I have a new Detail Layer. How can I combine with Lightness,a,b channels.

This is an example detail layer.

I convert Image into CIELab color space. After that I split Image into 3 channels are Lightness,a,b . So I have 2 questions

1. How can I decompose Lightness channel into Detail Layer.
2. Assume I have a new Detail Layer. How can I combine with Lightness,a,b channels.

This is an example detail layer.

Image credit from "https://inst.eecs.berkeley.edu/~cs194-26/fa14/upload/files/projFinalUndergrad/cs194-ew/img/hdr/memorial/memorial.detail.jpg"