Thumb() and IPTC copyright-infos & color-profiles

Kirby 2 Solved ✅
1

Is there an way to configure the thumb() function for keeping the copyright-informations & the color-profiles?

Thanks in advance

2

Solved. I wrote my own thumb driver.

3

May you share, what library you have used for that purpose or how you solved this?
Would be very interesting, because I also work on an advanced thumbnail generator for kirby with a strong focus on responsive design and the picture element. Keeping color profiles could be an interesting addition to my plugin.

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4

Hi Fabian,

remove the »-strip« command to include color profiles.

5

I just want to add something…
I use $command[] = ‘-thumbnail’;
instead of -resize (line 291 in thump.php) and -strip (line 277).

-thumbnail keeps the color profiles and delete everything else
-strip deletes everything… color profiles, IPTC profiles, EXIF, comments

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6

Thank you for this but I still have a problem.

Removing the line -strip helps to keep the right colors but changing -resize to -thumbnail breaks the code and all the thumbnails are generated as the original file in HD.

7

You mean that the images are not resized?
Could you please put this line at the end of your thumb driver and post the output here:

var_dump(implode(' ', $command));

What would also help is the output of convert --version on the command line.

8

BTW… which IM version do you use?

Because before IM v6.5.4-7 the “-thumbnail” command would strip ALL profiles from the image, including the ICC color profiles. From this version onward the color profiles will be preserved.

9

The best option I found to keep at best the colors of the images when resizing it is the following :

  1. Convert all the images in sRGB color profile
  2. Remove the line “-strip” (line 277 in thump.php)
10

I created an issue for this problem that color profiles are removed from thumbs.

https://github.com/getkirby/toolkit/issues/227

1 Like
11

This is great, thank you.