Activate the "color select tool" an click the black pentagramm. Then click on the icon "foreground color" to change to the desired color. The use the "bucket fill tool" to fill the selected area. Then click on "Select -> None".
Now you can do do the same on the backgound. Thats it!
Gunold
--- http://www.bilderstroeme.de ---

Am 28.12.2014 um 12:29 schrieb Chris1968:

Hi all,

I am planning to build a website over the coming weeks but I want to make some custom images albeit slightly basic ones. My first image project would be the banner for the home page for which I already have an image which I will attach to this post.

It is a simple two colour image of a pentagram. The pentagram is black against a white background but I want to change the black to a shade of gold maybe and the background to a shade of black. Rather that editing it pixel by pixel there must be an easier way by using gimp to alter the pentagram's colour and the background colour.

Any help greatly appreciated.

Chris

Sorry, forgot to add, absolute noob with Gimp.

On 28/12/14 17:03, Gunold Brunbauer wrote:

Activate the "color select tool" an click the black pentagramm. Then click on the icon "foreground color" to change to the desired color. The use the "bucket fill tool" to fill the selected area. Then click on "Select -> None".
Now you can do do the same on the backgound. Thats it!
Gunold
--- http://www.bilderstroeme.de ---

This method invariably leads to either pixellated edges or to a faint rim of the prevoius color. For a proper way to to this see here:

Proper subject extraction, background removal, and background painting

On 28/12/14 12:27, Chris1968 wrote:

Hi all,

I am planning to build a website over the coming weeks but I want to make some custom images albeit slightly basic ones. My first image project would be the banner for the home page for which I already have an image which I will attach to this post.

It is a simple two colour image of a pentagram. The pentagram is black against a white background but I want to change the black to a shade of gold maybe and the background to a shade of black. Rather that editing it pixel by pixel there must be an easier way by using gimp to alter the pentagram's colour and the background colour.

Any help greatly appreciated.

Chris

Attachments: * http://www.gimpusers.com/system/attachments/182/original/pentagram.jpg

When doing an image from scratch, the basic principle in Gimp it to work with layers, keeping objects in their own layer (the reste of the layer being transparent) so that they can be altered at will without impacting the rest of the image. If the pentagram is in its own layer, then changing its color is just alpha-locking the layer and bucket-filling it with the new color (due to alpha-lock, all pixels keep their original opacity/transparency), and the background color can be changed by simple bucket-fill.

28 дек. 2014 г. 18:59 пользователь "Chris1968" написал:

It is a simple two colour image of a pentagram. The pentagram is black

against a

white background but I want to change the black to a shade of gold maybe

and the

background to a shade of black. Rather that editing it pixel by pixel

there must

be an easier way by using gimp to alter the pentagram's colour and the background colour.

Can't lay my hands on GIMP to try right now, but could http://docs.gimp.org/en/plug-in-exchange.html be worth a shot?

Alex

You might want to try using color to alpha. Colors > Color to Alpha

To fine tune it you can use the curves tool.

Something like this maybe. https://dl.dropboxusercontent.com/u/93550827/temp/c2a.ogv

On Sun, Dec 28, 2014, at 06:27 AM, Chris1968 wrote:

Hi all,

I am planning to build a website over the coming weeks but I want to make some
custom images albeit slightly basic ones. My first image project would be the
banner for the home page for which I already have an image which I will attach
to this post.

It is a simple two colour image of a pentagram. The pentagram is black against a
white background but I want to change the black to a shade of gold maybe and the
background to a shade of black. Rather that editing it pixel by pixel there must
be an easier way by using gimp to alter the pentagram's colour and the background colour.

Any help greatly appreciated.

Chris

Attachments: * http://www.gimpusers.com/system/attachments/182/original/pentagram.jpg

-- Chris1968 (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list
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akovia

Chris1968 gimpusers.com> writes:

Sorry, forgot to add, absolute noob with Gimp.

I wonder how many actually looked at your image. It is very small, so do not expect a great result. Hope you have a larger, better version.

First thing, it is grayscale and to do any work on it, change the mode to RGB (Image menu -> Mode).

As previous posts, Colors menu -> Color-to-Alpha will remove the gray background, even using the default setting, and a Layer menu -> Transparency -

Alpha-to-Selection will then select the pentagram for filling with a new

colour.

Big but...The quality of the posted jpeg is horrible, lots of artifacts resulting in semi-transparent pixels all over. Tweaking with the curves tool will improve the image. The only real way is to re-draw using the original as a template. Not difficult, several ways to do it. Using an old netbook and Gimp 2.6, in a few minutes while watching TV. Could be better.
http://www.mediafire.com/view/dlc0ygm1ffcdv3w/penta.xcf The top layer is plain, a second layer has been bumpmapped to give a more 'golden' effect.
Too many jaggies, that is what happens with small (200x200 pix) images.