Change images to grayscale

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Change images to grayscale

Postby Dorien » Thu Sep 25, 2014 9:58 am


Could there be a way i can make a thumbnail copy of an color image to grayscale. So convert an image to grayscale and save that as a copy. Mabye someone has made this in the past?

~ Dorien
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Re: Change images to grayscale

Postby hansfn » Sat Sep 27, 2014 12:02 am

The thumbnails are created by timthumb.

Most thumbnail settings (timthumb config) is set in app/config/config.yml - look for the key "thumbnails:". However, filters are not configurable through that config file - you need to edit app/classes/timthumb.php (This should probably be filed as a feature request on

If you change

Code: Select all
define ('DEFAULT_F', '');


Code: Select all
define ('DEFAULT_F', '2');

around line 150 you get greyscale thumbs. (You might have to clear the cache first.) List of filter values.
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Re: Change images to grayscale

Postby streeff » Mon Oct 20, 2014 10:46 am

Would be even better if you could only apply that to some specific thumbnails, not all.
Evert Albers, Streeff - web // branding // information design - Amersfoort & Amsterdam, NL
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