GIMP :: Creating Outline Map With Only Black And White Pixels
Jan 1, 2013
I need to create an outline map for another application. The world is demarcated into areas, separated by black lines. The map must only have black & white pixels.
Some questions about using GIMP for this.
1. Is there a tool I can use to make every non-white pixel black?
2. Is there a tool I can use to eliminate isolated pixels of the wrong color (that is for me a black pixel with all neighbors white or vice versa)?
3. Is there a tool I can use to make the black lines thinner? It is desirable in my application to have the lines be only 1 pixel wide
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Jun 22, 2012
I have been working on a large number of sketches. At this stage I am just using the path tool to make the outlines of my cartoons.
I have got fairly confident with the path tool now, however on my first 3 pictures my paths were a mess. The first 3 pictures I stroked the path at 10 pixels, I would like to reduce this to 6 pixels. I am not able to go back to the original paths so I guess I need to select lines from the completed pictures and and convert these to paths, then restroke.
I have been trying to select by colour (it is all black) but that gives me the outline of the black, ie, a double path. I have tried selecting the back ground and expanding it by 2 pixels, this worked but not in tight corners.
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Aug 5, 2012
how do you create a square with a transparent fill (it has to go around part of a photograph)? I am using DP7. I can create the square with no fill, but how to get a black outline around it (to show that it's a square).
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Feb 15, 2014
I have the colored logo in vector but I need a crisp clean vector black and white outline.
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Apr 17, 2013
the link to the pics [URL]
how do i get rid of white pixels in the background
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Nov 27, 2011
Is there anyway to turn the white outline around the crazy pony to black? The pixels aren't spaced together well enough to use the bucket thing...
Attached File(s) 00000000000000.png (153.06K)
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Oct 20, 2012
I am trying to remove all the black and blue colors found in the attached picture, but it takes too long and intricate to do it space by space, so I was wondering how to remove a color found in the picture in one go.
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Sep 7, 2012
I have some white text in a floating selection and I want to outline the text in black (black border around text)... how Do I do this? I want my text to look like this:
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Nov 3, 2013
I rebuilt my line on white background from Rich2005 and Ofnuts. My latest version is darker, smoother higher res and wider (see attached).
The problem now are stray pixels, many of them unattached to the line itself. I spent a lot of time with an eraser, but still haven't gotten them all. THERE MUST BE A BETTER WAY!
I found this excellent link on the subject. [URL] RobA even has a script to do what I want. However, I don't think it is GIMP 2.8 compatible, as I can't seem to find it to run it.
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Jul 19, 2011
Whenever I try to use the 'Colour to Alpha' tool, while it works on most of the image, I always get little white dots left behind, and have to spend ages use the eraser tool to get rid of them.
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Jun 19, 2013
I have 2 layers and I want to mask one through the other. I've attached a png showing what I want. I tried to attach an .xcf file, but it won't do it, which seems strange for a gimp forum. Anyway, one layer is the text (black outline) and one layer is a colorful background. In the xcf, the background layer is entirely filled with the colorful stuff, but I want it to only show through the interior of the letters (as shown in the png).
Attached File(s) at-final.png (9.55K)
Number of downloads: 2
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May 8, 2012
I haven't found a way to turn a color photo into a Black & White outline drawing in Corel PhotoPaint X5.
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Mar 5, 2011
I've been using GIMP to make GIFS for a long time now, but recently the "optimize for difference" option I've used is having the reverse effect it should have- ie, it's making the file larger. Here's an example. It's the exact same image, same dimensions, same amount of colors. The first one is unoptimized, each frame is a full picture, and it's file size it ~149kb. The second one is the same as the first, except optimized with about ~50% of the pixels removed from each frame (except the first frame obviously), and yet it's file size is ~155kb. I can not for the life of me figure out why an image with most of it's pixels removed is creating a larger file size. [URL]...
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Nov 4, 2006
I have a photo of my brother's hand wearing a wedding band. I would like to have the whole photo in black and white except his wedding band, which is golden in color.
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May 5, 2013
Im trying to get rid of the black and white lines in this picture .
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May 1, 2013
how do i get rid of black and white lines in this pic
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Mar 25, 2013
I have a simple JPG file that is a black and white logo, which I want to change the colour properties of in Gimp. But the colour range isn't true black and white, so using all sort of different methods such as magic wand selection, colour to alpha etc results in either really messy looking images or a lot of faffing around to correct the final image.
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Mar 6, 2012
when I use the shape tool and text tool I'm getting a red dotted outline instead of the usual black outline. If I draw a rectangle it's empty, instead of shaded in? How do I put things back to normal?
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Jan 4, 2012
What I am trying to do is change a photo of a bright red abd dark black car to a white car.
In all cases what I seem to be running into is the fact that the programs use the existing colour as the start point and allow only so much variation from that colour (ie about 180 +/- in each primary colour) which does not get me to where |I need to be.
I also tried creating a new layer and filling it with the desired colour then changing the layer from normal to hue. The result ends up being a mix of the original colour and the new colour so for instance if I want a yellow over a blue original colour I end up with some variation of green.
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Mar 27, 2013
What I'm trying to do is curve a white to black gradient along a windscreen wiper smear for a rail engine cab window I need to texture. I'm building the cab for an engine in RailWorks and to get the wiper to clear raindrops from the screen in time with the wiper motion the texture needs a gradient applied to it from the wiper rest position to full up position.
In the picture the actual wiper smear is all black. What I need to do is have it all white from the vertical part of the smear or the wiper rest position, to all black at the maximum part of its stroke. This means the gradient will be a lot shallower on the outer edge of the arc and a lot steeper at the inner edge of the arc.
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May 20, 2013
i am trying to just colour her lips in
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Jun 17, 2012
i am planning to spend some weeks in France - and there i want to take many many pictues.
The question - shoulkd i switch off the color chanel before i take the fotographs or afterwards. I can swith it off at the Nikon Camera - sure thing
Black and White - when to switch off the color chanel
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Aug 3, 2012
I'm still working on old family photos (it's a long-term project). This one is from my parents' wedding album, and it's an original black-and-white photo from 1952:
Maybe it's me, but I just don't like all those different gray tones, and I would love to get my mother's gown whiter (which it still is, BTW). I have tried a few things to even things out:
- Brightness/Contrast
- Threshold, Levels, Curves (I have to admit, I don't know what I'm doing with these; it's sort of hit-or-miss)
- Auto adjustments
- Fuzzy select to try to get the darker pieces more like the lighter ones, but the adjustments I just listed aren't doing what I want and are hard to see anyway; I thought the Bucket tool might work but I don't know how to use the gray area I want as a fill color.
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Feb 7, 2012
There are many methods to make a black and white mask if you want to show through hair or other fine detail. Is there a classic method in GIMP?
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Jul 28, 2011
how to change a colour or black and white photo to sepia
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Sep 8, 2011
I sell a template that has a transparent layer in sections, after saving as jpeg it is supposed to go white, but for some of my customers it recently started going black!I at first thought it had to do with not pasting the layers correctly, but its like this after export, so I don't think that should matter...I've attached a sample image so you can see what is happening. Where it is black, it was originally transparent around the circle image, and normally would save white.
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Feb 16, 2013
How to change black and white hand-prints into color for some art work for my kids. I am already able to switch between black and white between the foreground and background, but not able to change all of the black "color" to a different color including all the minor lines on the hand and foot prints.
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Sep 6, 2012
I have done a little work and created these images. The blur does not look completely right to me because I just used the free select tool and would copy the coin part of the picture out and paste it back on with a different layer and line it up as well as I could. I would really like to make it look a lot better with no blurred part of the coin in the back ground. I would also like to turn the background of the image B&W and leave the coin in color.
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Mar 31, 2013
I just want to cut out/lasso an item in a pic and not have a black or white background..just the item itself..
I have *picked a photo
*click layer
*chose transparency
*added alpha channel*
*cut/lasso item out
*selected invert
*pressed delete on keyboard
*pressed select and none
I then get this picture which looks perfect right???
But when I copy and paste it or open file in paint or anywhere else it ends up like this? I want just the cut out and not the background too but no matter what I do the stupid thing comes with..
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Aug 3, 2013
How to add tint, shade and tone(Gray) to RGB when creating colors for palette, cuz i only get hue(pure color) when mix reg green and blue????
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Apr 26, 2012
Alright, with out pictures, let me try to explain what I'm trying to do I'm trying to create a black and white (grayscale) top-down gradient of half a cone.
I select a circle, and using the cone gradient, start from the middle and go outward to the edges. Great so far, I have a top-down cone, but what I really need is only half of that, as if I was creating a top-down volcano with the top half sliced off and a flat rounded middle.
This is becoming a bump-map so the RGB value must match perfectly the highest point of the gradient with the sliced off part.
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