Jump to content
Our response time is longer than usual currently. We're working to answer users as quickly as possible and thank you for your continued patience.

Selection Refine... conundrum


Recommended Posts

I use selections here and there, but in a haphazard kind of way, as I've been hampered by some odd behavior when refining those selections.

I first make a rough selection using e.g. the Selection Brush Tool, then I go into the 'Refine...' dialog and start painting the edges to refine. At this point the selection usually looks very much to my satisfaction, especially when checking with the 'Matte Black' preview. But whenever I then click 'Apply' in the refine dialog, the resulting selection is all messed up and a far cry from what I saw in the refinement dialog. What' am I missing?

Link to comment
Share on other sites

Can you show us an example of what you mean by “all messed up”?
It’s difficult to diagnose a visual problem when you can’t see it.
A screenshot of the original, and one of the matte (while refining the selection), and one of the result may be useful.

Link to comment
Share on other sites

Happy to oblige. Below an example from an insect I shot (partial detail).

So here's the rough selection with the selection brush:

Clipboard03.jpg.8d865a7008b12e9dec4b64e3942fa2f8.jpg

 

This is the selection after refinement and with the black matte review (including all the fine hair detail as intended):

Clipboard04.jpg.b1679ed2311f84365ca564d9be6ff6e7.jpg

 

But after clicking apply, I see this, which still includes the fine hair detail, but obliterates some parts of the leg, which was included in the refined selection above:

Clipboard05.jpg.e4cffc584002870e99e0660617701010.jpg

 

 

 

Link to comment
Share on other sites

Thanks for supplying the images.
Hopefully one of the selection experts will see this and be able to advise.
(The problem may simply be down to the settings values you are using – Smooth, Ramp, etc. – but I could only guess while an expert will be able to steer you in the right direction much more quickly.)

Link to comment
Share on other sites

A general tip when selecting on low contrast images like this :

just add an brightness/contrast layer and push its settings quite a bit to increase contrast as far as possible. 
you may use HSL to boost colors, too.
then merge visible. 
the resulting layer can then be used for selection. 
after having a good selection, simply hide or delete - then apply the selection to the original layer. 
 

using this helping layer will give you much more visible feedback of you selection. 

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

Link to comment
Share on other sites

Another option in your case: the background seems totally black. You may use selection by color of the background, then invert selection. Could provide better results. 

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

Link to comment
Share on other sites

Another tip: before using color-based selections, check if your document is at least 16bit color mode. In 8 bit modes, selection can become erratic (all or nothing)

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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...
 Share

×
×
  • Create New...

Important Information

Please note there is currently a delay in replying to some post. See pinned thread in the Questions forum. These are the Terms of Use you will be asked to agree to if you join the forum. | 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.