[CoreImage] How to create cube data from LUT Image for CIColorCube / CIColorCubeWithColorSpace

Updated

Mar 23, 2021 6:35 PM

Created

Mar 23, 2021 3:34 PM

Best solution

We need to use following image as neutral HALD CLUT Image. (Not square aligned one)

I don't know why, but this square aligned LUT image does not work well. It depends on the parsing algorithm?

This website can download the neutral LUT image.

LUT Generator

This site has also nice tutorial and providing software.

IWLTBAP LUT Generator

➤ What is a LUT and a HALD?A Look-Up Table (LUT) is a file containing math instructions to replace a color by another one. This process is done pixel by pixel, that gives a very high accuracy. A HALD is a 3D LUT converted into 2D image as JPG or PNG file.

sellfy.com

Imprementations

This article explains very well how we create cube data for CIColorCube.

https://gist.github.com/JoshuaSullivan/b575d96bfd8a4177d8d46352e5f36458

Additional resources.

[iOS] Lookup Table Image (LUT Image)로 필터 적용하기 with CIColorCube, Metal

⚠️ 정확히 이해못했는데, 기록용으로 쓰는 것이라서 자세한 설명을 기대하지 마시오 ⚠️ ⚠️ Metal로 하는법은 제대로 안나오고 있으니 따라하지 마시오 ⚠️ [1] Lut Image 프로젝트에 넣어주기 여기서 35 FREE LUTs를 다운받아주세요-! 디자이너분이 포토샵 작업 후 35개의 Lut image를 주셨다고 가정합니다.

eunjin3786.tistory.com

[iOS] Lookup Table Image (LUT Image)로 필터 적용하기 with CIColorCube, Metal

docs.huihoo.com

https://chibicode.org/?p=57

chibicode.org