Image color profile

General
1

Following up on this tracker, how do I change the profile?

Thanks

2

The link goes to the Xojo Login Page!?

3

You have to be authenticated to go to the tracker. (thus the login page)

If you’re logged in it takes you to the issue:

image
image1528×342 42.3 KB

fyi,
Anthony

1 Like
4

Maybe this? (just did a Google search, no experience)

1 Like
5

Technically you don’t. You can however convert to a new profile in an image editing app. MBS or Einhugur may have a way to do it and there’s probably a declare on macOS.

Think of it this way, it kinda works like text encodings. If you have UTF-8 text, you can use ConvertEncoding to change it to ASCII, but if you simply use DefineEncoding to set the encoding, what you get out is not usable.

1 Like
6

Well, if you need to convert an image from one color space to another, you could do different things:

  1. Use Xojo to load into a picture. Then make a new picture of same size, draw old into new and save new picture. That should convert to Generic RGB colorspace on macOS.
  2. Use GMImageMBS class and assign new ICC Profile there and save. Changing the profile converts colors.
  3. Check the LCMS classes and the related examples to learn how to convert pictures and check our JPEG, TIFF and PNG classes to handle the read/write part.
  4. If it’s just one slow image, ignore it and move on.
7 
Use Xojo to load into a picture. Then make a new picture of same size, draw old into new and save new picture. That should convert to Generic RGB colorspace on macOS.

Yes, but when I re-save the image, I lose the creation and modification date and time; I have to re-enter them afterward.

It’s still a solution, though, thanks.