86
votes
Making the background of an image transparent in Gimp
Using fast bucket fill instead of contour selection
Note: This tutorial is also available in PDF.
Add an alpha channel
Some image types lack a transparency channel; JPG for example. If this is the ...
- 1,202
57
votes
Accepted
In Inkscape, how do I add a white background?
You are correct--that "checked background" is how many programs indicate transparent areas. SVG files have a transparent background. Changing the background color is not part of the SVG standard, so ...
- 6,682
55
votes
Accepted
Save a JPG without a background
You can't save transparency to a .jpg. The file format simply doesn't support it. Anything that is transparent will become white when saved to a .jpeg.
Try .png or .gif, those file formats do accept ...
- 24.3k
49
votes
Accepted
Why does a brush with 50% opacity and 100% flow take 8 individual strokes to reach 100% opacity?
Basically it blocks 50% of what is left behind, as opposed to being a pure 50% opacity in a additive way. Therefore working in an inverse exponential way towards 99.999...% opacity.
So laid on top of ...
- 4,693
46
votes
Accepted
how to make a color transparent in GIMP
Whenever we choose to change a color to transparent with the Layer > Transparency> Color to alpha tool we will also introduce semi-transparency of colors different to the selected. Below this is shown ...
- 12.1k
45
votes
JPEG with transparent background
JPG does not allow transparent backgrounds.
The only thing you can do is have a flat color background that would blend into your website: eg. if your website background is white, then have JPGs ...
- 27.4k
34
votes
How would I remove all the white from this image? I just want the image to be the red parts
Double click your background layer in the layer pallet (to make it into a standard layer)
Choose Selection -> Color Range
Click in the white area of the image
Bring the fuzziness up around 90
...
- 3,198
25
votes
Accepted
Why does this PNG image on twitter look different when clicked?
The picture doesn't change. The background color of the page does.
It's a transparent PNG. The whites are not visible on a white background. The blacks aren't visible on black background.
The normal ...
- 1,775
25
votes
Accepted
Transparent artboard backgrounds in Photoshop
As of Photoshop CC 2015.5 you can now have artboards with transparent backgrounds.
Either create a new Artboard and select Transparent under the Background Contents menu or, if you have an existing ...
- 10.9k
22
votes
Accepted
Can I change the default Gimp transparent background to white?
Yes, that would be very easy, I just opened up Gimp 2 my self and tried it out to make sure! :p Anyway, in the layers panel, right click and choose New Layer.
Then make sure you select White for the ...
- 393
20
votes
Accepted
Sketch3: export a group and keep the size of the transparent background
Got 2 answers for you...
Select Rectangle 6 and click on make exportable, now click Create Separate Slice Layer (the little knife) and simply drag the shown image to your desktop to export it.
(The ...
- 850
19
votes
Accepted
How can I make a shape look like it is made of glass?
Some initial notes
Let's make a google search (images):
https://www.google.com/search?q=crystal+logo
1) You can see how difficult is to make an abstraction of a crystal. Verey few logos succeed there.
...
- 33.3k
19
votes
Why does a brush with 50% opacity and 100% flow take 8 individual strokes to reach 100% opacity?
Each stroke is moving 50% from the current color towards the brush color. The formula would be 100% * (1 - (brush opacity ^ number of strokes)). So going from white to black, you will have:
50% gray
...
- 358
18
votes
Accepted
How to determine the equivalent opaque RGB color for a given partially transparent RGB color against a white background
Use formula Y=255 - P*(255-X) where X is a RGB number, P=opacity (0...1), Y=new RGB number which should give the same appearance with 100% opacity as X gives with 100p% opacity against white ...
- 50.3k
17
votes
What is an "alpha value of black"?
The alpha value is used in the RGBA colour space to indicate the transparency of a colour. The alpha value goes from 0 to 1 where 0 is completely transparent and 1 not transparent at all.
This ...
- 8,098
17
votes
JPEG with transparent background
JPEG doesn't support transparency at all.
Most compatible option is to use PNG, but results in large files for photographs because it is lossless compression.
Another option is to use the new WebP ...
- 271
16
votes
JPEG with transparent background
While the JPEG format can't handle transparency itself, it is entirely possible to have transparency using JPEGs with modern browsers. It is, however, complicated. It involves using SVG to create a ...
- 277
15
votes
How would I remove all the white from this image? I just want the image to be the red parts
Ctrl/Command+Click the green channel thumbnail in the Channels Panel
Hold down the Option/Alt key and...
Click the New Layer Mask button at the bottom of the Layers Panel
Save....
- 197k
15
votes
Accepted
Removing all partial transparency in GIMP
If you want to remove the transparency of the partially transparent pixels, use Layer>Transparency>Threshold alpha. Depending on the threshold this will either make the edge pixels totally transparent ...
- 13.8k
14
votes
Make a selection of image transparent in GIMP
Here is another method to make a selection semi-transparent.
Choose Layer > Transparency > Add Alpha Channel if not yet done.
Select your area.
Choose Select > Float (ShiftCtrlL) for creating a ...
- 12.1k
13
votes
What is the name of hobby grade equipment to create photos where the background can be easily removed?
How about a light box? They are cubes made of some sort of semi-translucent fabric that diffuses the light. You can probably find something like that in your local photography equipment store. Here is ...
- 8,098
13
votes
Illustrator: changing the opacity of fill and stroke independently won't work
You should expand the small triangle on the appearance panel and adjust as usual -
If it does not work - probably the problem it the way you created the shapes
- 10.4k
13
votes
Accepted
Make a selection of image transparent in GIMP
Select a rectangular region of the image with the Rectangle Select Tool.
Click the Eraser Tool. It looks like a pink eraser.
In the Tool Options pane, change the Opacity to 50%.
In the Tool Options ...
- 786
13
votes
Accepted
How to create a gradient opacity mask in Illustrator
Duplicate the object that you wish to create a reflection of and flip it vertically (Object > Transform > Reflect, making sure you choose Horizontally)
Duplicate the "reflection" group that you just ...
- 6,594
13
votes
Illustrator: white space around logo when exporting as JPG
In the Export dialog box, tick the 'Use Artboards' option. This saves the image including the containing artboard, what you're seeing as the white frame behind your logo.
If you need to re-adjust the ...
- 27.4k
12
votes
Accepted
Transparent path/stroke fill in Illustrator
There is a little known feature, in Illustrator, that allows you to do this non-destructively. That is without expanding and using pathfinder. This can bring some future flexibility to your designs. ...
- 55.1k
12
votes
PNGs made in GIMP not coming out transparent
I’ve worked out why this might happen. If the Image Mode is set to Indexed Color, then the export doesn’t seem to accept the added alpha channel. So:
Image → Mode → RGB
File → Export As → imagename....
- 223
12
votes
Accepted
Set a stroke to knockout a fill behind it with live text in Illustrator
This is possible to do. You just need to know a very rarely used feature*.
First turn on transparency grid, so that you can observe the effect. Choose: View → Show Transparency Grid or hit Shift ...
- 55.1k
12
votes
Accepted
Adding transparency to ink drawing
To remove shadows and grain from the background we can chose a threshold for values of transparency and of opacity when using the "Color to Alpha" tool in Gimp 2.10:
Simply drag the sliders until you ...
- 12.1k
11
votes
Accepted
GIMP will only fill with black
Likely the PNG file is in Indexed Color Mode. Check in Menu: Image > Mode whether it is set to Indexed.... Change it to RGB and you can use any color you'd like.
- 2,959
Only top scored, non community-wiki answers of a minimum length are eligible