Are there any additional options/attributes required in order to get the equalize filter to work?

[T4VincentF]

Hi,

I'm testing out some of the thumbor filters in v6 of the serverless image handler at the moment and it appears that equalize isn't working for me.
I used the original image referenced in the equalize filter docs here but the image appears to remain the same when /filters:equalize() is added to the URL. - see image url below

https://d1lptcrn2ongl3.cloudfront.net/filters:equalize()/vf-rdqa-4888/pxl-filters-channel/t4_preview/test-case-id---c381418/t4_749877E84C78E413933E023629F2178142B968129B11A6622AC113988DEB47D2-9245.jpg

I'm wondering if this filter requires some additional parameters in order to work or if this is a bug?

Cheers!

Edit: Included version of serverless image handler

[Furytron]

I don't think it does anything to be honest, looking at the code here I can see its set the currentEdits.normalize to true, but I cannot see anywhere else that is referenced. I could be missing the obvious though and AWS would need to confirm.

[dougtoppin]

We are adding this to our backlog to investigate and will reply.

[dougtoppin]

@T4VincentF From some limited testing it does look like there is a bug in the handling of this. Adding your report to our backlog. Thanks for reporting this.

[dougtoppin]

@T4VincentF @Furytron After more investigation into this, it is not a bug. The Serverless Image Handler includes a thumbor style interface in the api but maps those to comparable sharp library calls. For the thumbor equalize filter that is the sharp normalize function.
It may not produce exactly the same result but is the closest match in sharp.
We added a story to our backlog to update the documentation to clarify how this works.

[Furytron]

Thanks @dougtoppin . Docs would be handy to clear up any confusion