Ideas on generating 3D LUTs programmatically?

Question

I'm trying to figure out, how to build .3d, .cube or .mga files, which contain look up table data for color correction (e.g. Adobe Lightroom, Davinci Resolve etc.), programmatically. I can't find any hints on how a .cube file is written, structured and/or compiled or which language to use (glsl, c++, python ?). Maybe some of you guys have an idea on how to approach this topic?

Answer 1

Use python colour science module. i am try to convert sip1d lut file in cube lut file simple way and use lut file in pillow and pillow_lut module.you can apply 3dlut in image

import colour
from pillow_lut import load_cube_file
from PIL import Image

def convertlut(Inputlutfile:str,outputlutfile:str):
    #read lut file in color modurl
    lut1d = colour.read_LUT(Inputlutfile)
    #Convert 3x1D to LUT3D
    lut3d = colour.io.LUT_to_LUT(lut1d, colour.LUT3D,
    force_conversion=True)
    # Write the cube lut file
    colour.write_LUT(Lut3d, outputlutfile) 

if __name__ == '__main__':
    convertlut("cgc_luts\luts\ACEScc_to_linear.spi1d","output3dlut.cube")
    #load lut file
    lut = load_cube_file("output3dlut.cube")
    #open image file 
    im = Image.open("image.png")
    #apply lut object in image and save image
    im.filter(lut).save("image-with-lut-applied.png")

i hope this helps. fix your problem