Jump to content
You must now use your email address to sign in [click for more info] ×

"Apply Image" with LAB wrong when Metal Enabled (1.7.0)


Recommended Posts

There is a problem with "Apply Image" filter when metal is enabled and when not enabled. It produce different results. see screenshots.

Right result when metal is NOT enabled (screenshot 1-filter/1-opts), when metal is "on" - result too much white (screenshot 2-filter/2-opts).
In other cases it looks like like filter with Metal "on" try to make channel value above 1, clamping colors

1-filter.png

1-opts.png

2-filter.png

2-opts.png

Link to comment
Share on other sites

1 hour ago, Chris B said:

Hey IPv6,

Do you have the beta installed and if so, can you still reproduce this? I've been checking the filters as I go but this one seems to be behaving for me in the beta. I'd appreciate a second opinion.

Yes, the same problem exist in latest beta as well. Metal-powered execution of "Apply Image" filter in LAB mode is completely wrong // Looks like LAB values are offsetted, making everything "whitish" and causing clamping where it should not (i use this filter in macros for LAB transformations and difference is big)

Снимок экрана 2019-06-14 в 16.45.50.png

Снимок экрана 2019-06-14 в 16.46.27.png

Снимок экрана 2019-06-14 в 16.48.13.png

Link to comment
Share on other sites

  • Staff
47 minutes ago, IPv6 said:

Curves and Channel mixer are ok, though, in beta... i was under impressions they suffer from same problem but in beta they are not.
So only apply image affected
 

Yeah I had another go and came back to tell you I've cracked it. Thanks @MEB

Link to comment
Share on other sites

selective color adjustment has this problem  in LAB where it changes a saturated blue to magenta without making any changes  ie happens as soon as you call up the selective color adjustment  first picture is before selecting selective color adjustment second is after selecting selective color adjustment without making any changes in the sliders.

Screenshot 2019-06-15 at 09.03.56.jpg

Screenshot 2019-06-15 at 09.04.14.jpg

Link to comment
Share on other sites

  • 1 month later...
  • Staff
On 6/15/2019 at 5:09 PM, hanshab said:

selective color adjustment has this problem  in LAB where it changes a saturated blue to magenta without making any changes  ie happens as soon as you call up the selective color adjustment  first picture is before selecting selective color adjustment second is after selecting selective color adjustment without making any changes in the sliders.

Hi hanshab,
Thanks for your report and sorry for the late reply. This issue should now be fixed in the latest Affinity Photo Customer Beta 1.7.2.147.

Link to comment
Share on other sites

4 hours ago, MEB said:

Hi IPv6, 
Yes, there's still issues here, sorry. Note that's actually the Metal output that's correct (not the opposite). The issue/log is still open for reviewing/fix.

"Metal output that's correct (not the opposite)" - so something changed behind LAB calculations? i see... Please, provide us (AP users, i mean) with exact information about how Affinity Photo treat A/B channels in filters, after all... I heavily use calculations over lab channels for some effects - and unusual non-documented mapping stuff (i suspect that channel value limits between Metal/Non metal was changed? or anything) does not help. As well as endless guessing for "right remapping mindfuck" to make some LAB-related filters just to work as expected //

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Terms of Use | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.