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how to cut image into circle shape

Feb 7, 2011, 18:36
Post: #1
how to cut image into circle shape
Hi all,

I am totally new to image editing. I have a square shaped image, wants to cut it into circle. How can I do it? I did it easilly in ms paint, but for gimp it's quite confusing. I tried to draw a circle, but I don't know how to put this image inside the circle. Or maybe just easilly crop as circle, how can it be done?

Thank you for the tips..
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Feb 7, 2011, 20:37 (This post was last modified: Feb 7, 2011 20:42 by ofnuts.)
Post: #2
RE: how to cut image into circle shape
Word of caution: there are no circular images. There are images where corners are transparent, so that only a circle shows.

First make sure that your layer has an "alpha channel" (menu: Layer/Transparency/Add alpha channel)(if it's grayed out, it means you already have one)

Then create a circular selection ("Ellipse select tool", the 2nd one in the toolbox). You can check the "Tool options" dialog: menu: Windows/Dockable dialogs/Tool options (top of list). If you want a true circle, check the "fixed", select "aspect ratio' and enter "1:1". Depending on what kind of marks you have, you can use the diagonal framing (default) where you click one corner, and release at the opposite diagonal corner, or the radial one (check "expand from center" in the Tool options) where you click where you want the center of the circle and release where you want the border.

Once the selection is done, you can adjust it (click around the middle) or extend it (click inside, but close to the sides).

One you are have the required selection, invert the selection, so that everything is selected, except your circle: menu: Select/Invert (or Ctrl-I)

Erase the selection (menu: Edit/clear or "Delete" key). You should have your central circle left, surrounded by a checkerboard pattern.

Reduce the checkerboard to the minimum by auto-cropping the image (menu: image/autocrop image)

Save image in a format that supports transparency, like PNG. JPEG doesn't support transparent images...

If you are going to work further on the picture, save ist as XCF (Gimp native format).

[Image: 2Tvo0.png]

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Jun 2, 2013, 06:47
Post: #3
RE: how to cut image into circle shape
OfNuts,

I don't know much about GiMP, just use it for some basic stuff, but I wanted to create the appearance of a circular crop. I came across your explanation here via a Google search. I followed your *very* clear, precise instructions, and the process worked like a charm. I know, of course, that this cropping process isn't all that complex, but it's *always* a complex undertaking to explain even the simplest of operations. Your explanation is just stellar, so I wanted to thank you for taking the time to post it.

Regards,

LuneKeltkar
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Jun 2, 2013, 09:06
Post: #4
RE: how to cut image into circle shape
Most welcome Smile

[Image: 2Tvo0.png]

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Jul 4, 2014, 01:21
Post: #5
RE: how to cut image into circle shape
I would like to add my appreciation for a concise solution. No BS

Thank you very much
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Jan 30, 2015, 21:04
Post: #6
RE: how to cut image into circle shape
I followed these steps as closely as I can, but I am not getting the expected result (a circular crop.)

my Right Click. Layer>Transparency> Add Alpha Channel IS greyed out.
I select a circle
I invert the selection
I Delete and... Voila! Nothing. Image stays exactly as it was originally.

what am I doing wrong.
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Jan 30, 2015, 23:32
Post: #7
RE: how to cut image into circle shape
I would suspect that the active layer is not the one you think (it could also be a channel).
If you paint on the image, outside of the circle, does it work?

[Image: 2Tvo0.png]

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Jan 31, 2015, 03:06
Post: #8
RE: how to cut image into circle shape
(Feb 7, 2011 18:36)thecup Wrote:  Hi all,

I am totally new to image editing. I have a square shaped image, wants to cut it into circle. How can I do it? I did it easilly in ms paint, but for gimp it's quite confusing. I tried to draw a circle, but I don't know how to put this image inside the circle. Or maybe just easilly crop as circle, how can it be done?

Thank you for the tips..


https://www.youtube.com/watch?v=myEAkFb2-f0
this link help you
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Jul 13, 2016, 16:49
Post: #9
RE: how to cut image into circle shape
I created a video tutorial on how to crop an image into a circle shape. You can check it out here:
https://www.youtube.com/watch?v=4RUB7GoITfM

Thanks,

Mike.

[Image: 2h7zyp3.png]
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Jul 13, 2016, 17:41
Post: #10
RE: how to cut image into circle shape
Getting better, except for all the advertising Wink

A more economical workflow is
Add alpha channel Layer -> Transparency -> Add alpha channel
Create a circular selection.
Image -> crop to selection Saves messing about with the crop tool.
Invert selection Select -> Invert
Cut the selection Edit -> Cut.

Exporting in Gimp does not require Select File Type by Extension for common file types. Gimp will recognise the common extensions and bring up the correct export dialogue.

You do not normally need to uncheck save background color in the export png dialogue. Most applications will honour the transparency (I think IE6 was an exception).
AFAIK it always gets saved as white in Gimp. You can check this value yourself if you run a Gimp png through ImageMagick identify

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