Question about Conversion RGB

I have this question to convert from RGB color to CMYK color

when i execute the Code I get this result

ans =

'RGB'

This means that no conversion occurred and the image did not appear to me, what can i do ?

folder = iccroot;

disp(folder)

profiles = iccfind(folder)

size(profiles)

currentProfile = profiles{1}

currentProfile.Description

ProfileName = currentProfile.Description.String

[~,descriptions] = iccfind(folder)

descriptions

[profiles,descriptions] = iccfind(folder,'rgb')

descriptions

currentProfile.Description

P = iccread('sRGB.icm');

P_new = iccwrite(P,'my_profile.icm');

I_rgb = imread('Pepper.png');

inprof = iccread('sRGB.icm');

outprof = iccread('EV2456 User 5000K G2.2.icc');

C = makecform('icc',inprof,outprof)

I_cmyk = applycform(I_rgb,C);

imwrite(I_cmyk,'pep_cmyk.tif','tif')

info = imfinfo('pep_cmyk.tif');

info.PhotometricInterpretation

Answer 1

[Walter Roberson]

The Enzo ev2456 is not a CMYK device.

Remember that icc deals with rgb profiles as well as CMYK.