Image Manipulation

[Baker]

Sheesh. I'm drawing to draw a circle in Gimp and you'd think that'd be easy.

No.

I had to find a tutorial on it and it's mad hard for how easy it should be.

http://www.farcrydesign.com/tutorials/G ... orial.html

[goldenboy]

To draw a circle in Gimp, you only need to create a circular selection of the right size, then "Stroke Selection".

To draw anything out of straight lines, I usually just use the paths tool and then "Stroke Path".

... If you need to use mainly straight lines etc for something, then a vector graphics application will perhaps be better suited, like Inkscape.

http://www.inkscape.org

[leileilol]

why can't i just have a damn circle and line tool?

"submit a patch" - a developer

"FUCK YOU" - a typical frustrated end user

[qbism]

[toneddu2000]

I really suggest you, as goldenboy said, to use Inkscape for this kind of works

[Baker]

Inner mysteries to unravel:

1) Flood fill
2) Edge detection
3) Complex selection

In a way those aren't hard. In a way, they require a bit of efficiency. And they are all related.

Input: For instance, let's say there is an image with a solid white background color.
Output: Let's say you wish to change that background color to green.

In theory ...

1) Generate an alpha mask with alpha = black (not solid) for areas of the background color and ...
2) alpha = white (solid) for areas not touching any area next to the background color and ...
3) an alpha scale for areas bordered by either of the above in proportion to how many or 8 maximum neighboring pixels (top, right, bottom, left, top right, top left, bottom right, bottom left ... but edge of image pixels do not have all of these) are of each type.
4) Then again, some of the neighboring pixels may be other bordering pixels.

[Baker]

[Baker]

[Baker]