Can anybody tell me what I'm doing wrong?

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

Thanks, but I think I am launching the filter having an image (the image appears as the "Because" in the left side box).

If someone could just tell me how to hot up the "Modify Curves" box in the Curves filter... I just can't find any way to turn it on. If you could tell me the specific steps (I am probably not doing something very simple, one of those everyone-knows-but-me things) to get that box turned on I would appreciate it.

Or if someone has a "curve-an-image" plug-in, I would really like to have it.

I have downloaded several Gimp plug-ins that appear as SCM files that Windows 10 refuses to open. I think somehow somewhere there's got to be someway to open a Gimp SCM file, it's just a matter of convincing Windows 10 to do it. (I've found stuff to download on the internet that says it can, but not from any source I would trust.)

dinasset · **Posted:** Wed Jul 27, 2016 12:49 am **(#62)**

Send me (post here) your source .png image

dinasset · **Posted:** Wed Jul 27, 2016 12:51 am **(#63)**

Maybe I discovered your fault: do you have the transparent BG selected when you launch the filter?

dinasset · **Posted:** Wed Jul 27, 2016 1:04 am **(#64)**

looking again into your previous post, I see a "not responding" message coming out from the filter: does this happen always on your PC using also other images as source?

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

The "not responding" was just from the screenshot. Here's the image I am trying to curve. I 've tried clicking on each layer, flattening it, nothing gets that Modify Curve box to hot up.

On a better note, I figured out how to open the SCM files: all I had to do was tell my computer to open them in Notepad, not Paint. Now if I could just find where some of them went to in Gimp...

Wallace · **Posted:** Wed Jul 27, 2016 3:05 am **(#66)**

I was wondering if you tried to use the curve bend interface, as if it was functioning?

I'm thinking,
that the curve line used to manipulate the bend is actually present,
but can't be seen.

Try this as an experiment,
if you haven't yet tried this already.

When you do what is in the screenshot above,
dose your image bend?

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

The only thing I could get to click on was the Automatic Preview. There's nothing for me to click in the right hand Modify Curve box, but I clicked the black all over the place just in case. Nothing.

Wallace · **Posted:** Wed Jul 27, 2016 4:00 am **(#68)**

newtogimp wrote:

The only thing I could get to click on was the Automatic Preview. There's nothing for me to click in the right hand Modify Curve box, but I clicked the black all over the place just in case. Nothing.

Can you change your Gimp theme back to the default theme,
to see if this makes any difference?

Also can you disable single window mode?

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

I'm sorry, but I don't know what a "Gimp theme" is. If I changed it to default would I lose all my plugs-ins, etc.?

I checked my Windows box, my single window isn't turned on.

This is the most I can get with the Curve Filter (I don't know what to do with it, though I have a sneaky suspicion I know why Gimp is calling it the "dummy" layer).

rich2005 · **Joined:** Mar 04, 2011 **Posts:** 2629

The clue is in your screenshot: Using one of the Windoze High Visibility themes.

Black-on-black does not show

Go back to a more regular Windows theme.

Attachment:

hi-vis.jpg [ 195.44 KiB | Viewed 1961 times ]

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

THANK YOU!!!!!!!!!

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

I am trying to "extract hair" (taking a person with a head of hair, lifting her from her background, and putting her against another background). I am following this video tutorial:
http://www.bing.com/videos/search?q=gim ... &FORM=VIRE

My problem is that when I go to Colors>Curves I can't adjust it so I get a white background like the tutorial gets. The best I can get is a black background. Can anyone tell me how to get that white background in Colors>Curves like the tutorial is getting? Thank you.

trandoductin · **Posted:** Thu Oct 27, 2016 12:20 am **(#73)**

What is your picture?
White hair on black background or black hair on white background would work either way you'll just have invert colors when after you apply it as a mask.

EDIT: The Color->Curves step, you just want different contrast between your hair and your background it doesn't matter if the background is black or white as long your hair is the opposite so that it stands out from background. Depending on the image, your background can be pushed to white or black whichever works.

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

Thank you. I'm totally lost. All I want to do is lift the wig out of this picture and paste it onto another picture. I know to Add Alpha Channel>make a duplicate layer>Colors>Curves ... and then I'm lost, nothing works like in the tutorial and I can't find another tutorial that gives me what I want. :gaah

dinasset · **Posted:** Thu Oct 27, 2016 3:09 am **(#75)**

Best tool I know so far is G'MIC Foreground Extract interactive.
Unfortunately it seems no more working on the last update (or it's just me...)

Edit: I get always this sequence of messages when trying to finish (escape)
----------------------------------------------------------------------------------------------------------------------------
GIMP Error
Calling error for procedure 'gimp-drawable-sub-thumbnail':
Procedure 'gimp-drawable-sub-thumbnail' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer.

GIMP Error
Calling error for procedure 'gimp-drawable-sub-thumbnail':
Procedure 'gimp-drawable-sub-thumbnail' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer.

GIMP Error
Calling error for procedure 'gimp-drawable-sub-thumbnail':
Procedure 'gimp-drawable-sub-thumbnail' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer.

Rod · **Joined:** May 16, 2010 **Posts:** 16256

Open image
add alpha channel
duplicate
on duplicated layer run colors>curves until background is almost all black
now desturate the layer Colors>desaturate (lightness seems best)
now you need to fill in the entire LIGHT area with white
select the bottom layer - right click add layer mask (white) full opacity
select the top layer Edit>Cut select the layer mask on bottom layer Edit Paste - anchor the layer

Rod · **Joined:** May 16, 2010 **Posts:** 16256

Touched up a bit and added to a black bg.

trandoductin · **Posted:** Thu Oct 27, 2016 10:36 am **(#78)**

here's my try

newtogimp · **Joined:** Sep 10, 2015 **Posts:** 112

Thank you but I just can't seem to get it.

Add Alpha channel
Duplicate
On duplicate layer (I would think this is the bottom layer, but since nothing happens in the curves box when the bottom layer is selected, I guess the "duplicate layer" is actually the top layer?)>Colors>curves>turn to blackish>OK
On duplicate layer (still top layer?):Color>desaturate (lightness)
Fill in entire white area (which would be her face)
R click bottom layer (??)> Add layer mask (white)
Cl top layer: Edit>Cut
Cl layer mask on bottom layer (?? there's only one layer left): Edit>Paste

Maybe there should be an Invert in there somewhere? I've tried experimenting, gone down in flames.

Wallace · **Posted:** Thu Oct 27, 2016 8:22 pm **(#80)**

newtogimp wrote:

Thank you but I just can't seem to get it.

Add Alpha channel
Duplicate
On duplicate layer (I would think this is the bottom layer, but since nothing happens in the curves box when the bottom layer is selected, I guess the "duplicate layer" is actually the top layer?)>Colors>curves>turn to blackish>OK
On duplicate layer (still top layer?):Color>desaturate (lightness)
Fill in entire white area (which would be her face)
R click bottom layer (??)> Add layer mask (white)
Cl top layer: Edit>Cut
Cl layer mask on bottom layer (?? there's only one layer left): Edit>Paste

Maybe there should be an Invert in there somewhere? I've tried experimenting, gone down in flames.

The background of your wig image is mostly black and can't be change to white using color curves.
If you notice,
the image used in the tutorial,
has a lighter background then the over all foreground.

You would need to use color curves,
as described it the tutorial,
but in reverse.
So your background would be mostly black.
Painting anything of the background black,
that was not made darker by color curves.
Then panting everything else,
or the foreground white.
To come up with the proper image to use as a layer mask.

Your image would look something like in the thumbnail below.