Problems with LAB?

[Petar Petrenko]

Hi,

when modifying the image while draging the "L" slider, it can't be restored even if you enter the starting "L" value manually. Only with "Undo". Is it a normal behaviour, or...

[Callum]

Hi Petar,

I have't been able to recreate this if possible could you provide a screen recording demonstrating your issue?

[Petar Petrenko]

5 minutes ago, Callum said:

Hi Petar,

I have't been able to recreate this if possible could you provide a screen recording demonstrating your issue?

It is just very easy to do that. Just:

1. Remember the starting value of the "L" slider;
2. Drag it to any direction;
3. Enter the starting value for the "L" slider;

The image is not the same as it was at the begining.

[Callum]

3 minutes ago, Petar Petrenko said:

It is just very easy to do that. Just:

1. Remember the starting value of the "L" slider;
2. Drag it to any direction;
3. Enter the starting value for the "L" slider;

The image is not the same as it was at the begining.

I still can't recreate this I'm afraid.

[Petar Petrenko]

Oh, never mind. Maybe it's not very serious and LAB mode is not used too often.

[Joachim_L]

Petar is right. There is a difference in colour. Where do the Lab slider gets it initial value from and how it could be related to the image? Reverting to default it is L93 A0 B0 in my (everyones?) case. Same "problem" with the CMYK slider which starts only with K10. Moving C to 100 and back to 0 make the image look like greyscale. To revert to the original colours for the image you have to select the transparent fill.

[walt.farrell]

So why doesn't one of you who can see the problem provide some screenshots or a recording like Callum asked for? And perhaps some details like what OS you're using?

[R C-R]

2 hours ago, Petar Petrenko said:

It is just very easy to do that. Just:

1. Remember the starting value of the "L" slider;
2. Drag it to any direction;
3. Enter the starting value for the "L" slider;

The image is not the same as it was at the begining.

It might help if you explained where you see this slider & what it is being applied to.

[Joachim_L]

Publisher 1.7.2.471, Windows 10.

Perhaps Petar and I are brothers in mind? See attached file. Second image from left Lab slider moved to 0. Third image shows the colour when moving back to 93.

If you select an image, there should be no colour preset, of course reverting the colours will fail. Still unsure where this initial colour comes from. P.S.: No recording possible, I am not allowed to.

P.P.S.: Same problem in APhoto and I guess in ADesigner ... overread the tag of this topic.

[R C-R]

9 minutes ago, Joachim_L said:

Still unsure where this initial colour comes from.

I do not understand what you mean by "initial color." The sliders in the Color Studio panel just show the values for the selected color sample (whichever of the two large round sample 'wells' is frontmost in the panel). The wells can be set to anything -- they don't necessarily come from anything on the canvas.

[Joachim_L]

2 minutes ago, R C-R said:

I do not understand what you mean by "initial color."

Making a new document in panel Colour C0M0Y0K10 is preset. This is what I mean with initial.

[walt.farrell]

45 minutes ago, Joachim_L said:

Making a new document in panel Colour C0M0Y0K10 is preset. This is what I mean with initial.

It's whatever you have set as your defaults. If you don't like that one, pick a new color and change your defaults (Edit > Defaults > ...). It's not initially related to an image you've opened at all.

 

[walt.farrell]

@Callum: Here's a better recipe for you that may be what Petar was describing, though it's still a bit of a guess:

1. Create a new document.
2. Place an image file as a new (Image) layer, and make sure it's selected.
3. With the Color panel set to sliders, and the slider mode set to LAB, note the current value of the L slider. Move the slider. Image color changes.
4. Type the original value into the L box (or simply adjust the slider back to that original value). Image does not change to original color.

[R C-R]

3 hours ago, walt.farrell said:

• Create a new document.
• Place an image file as a new (Image) layer, and make sure it's selected.

This is exceedingly weird: in the current Mac versions of all three Affinity apps, when I use File > Place... the History panel records this as "Set text stylesheet" when placing either png or jpg files. However, in both Designer & Publisher if I use the Place Image Tool, this is recorded as "Place Image," as expected. In all three apps, either way the Layers panel shows them as "(Image)" layers.

Separate & apart from that, as for setting the 'fill color' of Image layers (whatever that is supposed to mean), for me it does not matter if the Colors panel is set to displaying the Wheel, Sliders, Boxes, or Tint; nor if set to Sliders whether it is set to display RGB, RGB Hex, HSL, LAB, or any of the other choices. Changing the color of the selected "(Image)" layer by any method (including via the Swatches panel) changes every non-transparent pixel in it to what seems to be a shade of the fill color that appears in the fill color well, without changing the selected layer type (or its behavior) from "(Image)" to any other layer type.

[walt.farrell]

20 minutes ago, R C-R said:

when I use File > Place... the History panel records this as "Set text stylesheet" when placing either png or jpg files.

That happens on Windows, too, though I've only tried it with Photo and with JPG files so far.

[Petar Petrenko]

19 hours ago, walt.farrell said:

So why doesn't one of you who can see the problem provide some screenshots or a recording like Callum asked for? And perhaps some details like what OS you're using?

You can see my signature bellow the post.

[walt.farrell]

4 hours ago, Petar Petrenko said:

You can see my signature bellow the post.

Oops. Sorry about that.

I couldn't actually, as your signature is so long (15 lines) that I had told the forums to hide it, and had forgotten I did that. I'll remember to check for that next time.