Affinity Photo 2 PSD compatibility: Vibrance adjustment looks different between Photoshop and Affinity Photo

[FeldrinH]

I have an image with a Vibrance adjustment that was originally created in Photoshop and saved as a PSD. Opening it in Affinity Photo, I noticed that desaturated and brown colors looked much richer and more vibrant in Photoshop. It appears that the vibrance adjustment layer behaves noticeably differently between Photoshop and Affinity Photo. It would be nice if that was not the case (or at the very least if there was a way to reproduce the effect of Photoshops vibrance adjustment in Affinity Photo).

Attached are three images showing the original image and the same vibrance adjustment (0% saturation, 100% vibrance) as rendered by Photoshop and Affinity Photo respectively. Notice in particular that Affinity Photo seems to barely affect the red shades at all, whereas Photoshop saturates reds just as much as other colors.

 

 

Edited July 7, 2023 by Juhan Oskar Hennoste

[firstdefence]

Which image is from Photoshop and which is from Affinity Photo? it would help to title the images. 

Why are there 3 images?

I see no browns! 

Tip: During the post creation and post editing you can double click on the images you add to scale them down, clicking on the image shows full size but for the initial post having smaller images makes the post neater, I'd suggest scaling the image down to 400-500px 

 

[thomaso]

Hi @Juhan Oskar Hennoste,
welcome to the Affinity forums!

I would not call the difference between the ps / aph images "much" and rather see a subtle difference, a bit more in the CMY than in the RGB fields and more obvious in the gradients, with the largest difference in "to white" and the smallest in "to black", whereas I don't see any difference in the plain black, gray and white rectangles, according to the "vibrance" adjustment that is meant to affect "dull" or "mutet" colours more than others.

Different to you I don't see a major difference in red (R) or brown (red + black, ?).

If I consider that vibrance is a mixture of properties (~ saturation / brightness / gamma, contrast) and assuming (not knowing) there is no 1 identical algorithm for vibrance used by all software developers I would not expect a perfect identical result for this specific adjustment. (this short discussion may be interesting, e.g. "more for colours that were less saturated to begin with, and it has something special going on if the red component is the biggest"). [p.s.: I experience larger differences in colour intensity when comparing same image edits in Lightroom versus CaptureOne – while we probably can't judge if/which one is "right".]

Video: For easier comparison in smaller image size in a browser window I first click through the 3 images with the two arrow buttons, then I simply keep the arrow key on the keyboard pressed. The fast switch seems to make the differences more clear – unfortunately this includes the view on the "original" and thus makes it difficult to compare only the vibrance affects between PS and APh.

[FeldrinH]

13 hours ago, firstdefence said:

Which image is from Photoshop and which is from Affinity Photo? it would help to title the images. 

Why are there 3 images?

The first image is the original unadjusted image, the second is Photoshop, the third is Affinity Photo. Unfortunately it appears I can't edit the original post anymore to clarify.

[FeldrinH]

8 hours ago, thomaso said:

If I consider that vibrance is a mixture of properties (~ saturation / brightness / gamma, contrast) and assuming (not knowing) there is no 1 identical algorithm for vibrance used by all software developers I would not expect a perfect identical result for this specific adjustment.

I suspect that you are right in that it isn't reasonable to expect Affinity Photo to have complex adjustments like vibrance behave identically to Photoshop. Though it is annoying if you have a specific color grade in Photoshop and then open the same PSD in Affinity Photo and find it is completely wrong.

[thomaso]

On 7/8/2023 at 10:24 PM, Juhan Oskar Hennoste said:

Though it is annoying if you have a specific color grade in Photoshop and then open the same PSD in Affinity Photo and find it is completely wrong.

Indeed "completely"? – However, if you notice the deviation in the colour appearance as being kind of systematic, you possibly can create a workaround with an extra adjustment (or a set of editing layers or LUT) that corrects the deviation + use this as an Asset for easier assignment to other documents.