UPDATE: I have added a direct link to the PDF file, as well as a sample image below to give an overview of the goal.
I currently have a color drawing/sketch that I want to convert to a vector file (.SVG or .DFX) to eventually have only the outline of the drawing be 3D printed in plastic (through a design in Autodesk Fusion 360).
The initial image was created in Photoshop and then converted to a PDF. I do not have access to the Photoshop source files.
My understanding of the steps to achieve this is:
1- Remove all colors and coloring inside objects (only keep the BLACK outline)
2- Use a tool such as Inkscape --> Trace bitmap to convert the remaining outline to SVG/DXF (or another tool)
There are some pretty nice and efficient online conversion tools, but most have limitations in their free versions (as well as other problems).
The following question is very similar to mine, but answer #1 doesn't work because it simply transforms the image to greyscale (to do so, wouldn't it be simpler to simply do Image --> Mode --> Greyscale??).
Answer #2 seems promising, but I am stuck at step #3, not knowing how/what to do with the levels. The included screenshots/jpg on that page aren't valid anymore.
Also, how do you "Make a new file with only the color you need."??
What Rafael describes is EXACTLY what I want at the end: Some black (only for the outline, and ideally SOLID black lines whereas the original may not be so cut (I think that's what anti-aliasing is for?) and some white.
Then I can simply take that new black and white image and have the outline converted to a SVG and then import this in Fusion 360 to extrude it in my model.
In gimp, I also tried the Color to Alpha, it worked for the white background.. but then I tried to "pick" the turquoise and the red to convert them to alpha, but nothing seemed to happen, not sure why... I am really outside of my comfort zone here... :(.
The tool I have at my disposal is GIMP, Inkscape and Fusion 360 on a PC.
Any help and guidance would be much appreciated.
Here is a link to the original PDF: Dwarf page
Thanks for any help. I'm really a noob when it comes to image manipulation.
You can see below a sample of the source file (left column), what I was able to achieve using online tools and some Inkscape (middle column, although not all turned out great - see bottom row). In the right column you can see a sample of the end goal: Import the SVG in Fusion 360, have the outline extruded outward, and then 3D printed.
The result I got in those 2 pictures isn't too bad, but it was very tedious and manual, not something I would like to do for each of the 50 faces. If there was a way to "process" the initial PDF/image containing the matrix of 50+ faces, it would be great.
Also, you can see in the 2nd image that the eyebrow were merged with the eye lids, and in the red image, the beard lost all its details because of the brown color inside that was too close to the black. Hence my desire to REMOVE all colors first (brown included), hopefully making it easier for the tracer to only trace the black.
Update to some of the comments:
My PDF is not a vector file.
I wanted to use GIMP to first remove the coloring, and THEN thought that Inkscape would help me with only the black. The goal is to use a tool like GIMP (or not???) to remove all the "blur" around the edges of the line, and really have a crisp, complete, black outline. Then have it traced to create the vectors.
I have added a sample of what I am trying to do, as well as a filedropper lik to the original file.