: How do I convert this image into a 3D model? Let's say I have some image that I'd like to somehow make into a 3D model. What I'd like to do is to convert each "blob" from the image into

@Margaret771

Blender can interpret grayscale images as height maps/displacement maps and use them to generate 3D meshes. A tutorial from 2017-08-27 ("Make mountains in Blender from height maps") is available here. Summarized, the steps are:


Enable the "Import Images as Planes" add-on (it's disabled by default).
Import your image (as a plane).
Subdivide the resulting plane mesh to increase its density (ideally, you want the number of quads to match the number of pixels in the source image).
Apply the Displace modifier to the plane mesh and select the texture containing the source image.
Adjust the Displace modifier's settings (it includes settings for basic UV mapping, too) until you're satisfied with the result.


See the actual tutorial for details.

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@Shakeerah625

If you are Ok with using Octave / Matlab you can load the image using "imread" and then do a "surf" plot which you can screenshoot using for example print screen.

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@Sarah814

At first: Goto Inkscape for the tracing. Ai's Live Trace is too painful for cases this difficult. I couldnt get any greyscale traces that resemble the original. Inkscape seems to be more clever. Here's a screenshot of 4 level greyscale tracing:



There are only 3 different greysghades because white is the background and it's rejected. Path simplifying = the default.

Inkscape does not export properly DXFs, but the SVGs have been reliable. Unfortunately SVG in nonexistent for my definitely non-professional CAD software. I have nothing from Autodesk.

For some reason I can import Illustrator files to my CAD. The colors are lost. So, I went to Illustrator and splitted the SVG trace to 3 different Ai files. One for black, one for mid grey and one for light grey.

The different Ai files are here dragged to the same image. The black frame is for securing the possiblity to align them properly in CAD. It was unnecessary, because they were saved from the same place.



My CAD or actually only a simplified low cost 3D modeller (name = MoI ver.3) imported the Ai files one at a time. I extruded them to different heights, gave different colors and hided the extrude as soon as it was ready. When all three were extruded, I released the hiding and got the following, freely rotatable and scalable scene:



I noticed one hitch. One small shape in the light grey file didnt extrude. The curve crossed with itself. I moved one control point a little and the problem vanished.

Program MoI makes NURBS -surfaces, but the result is exportable in several common polygon mesh formats. I checked also some free versions of proper commercial CAD software. Unfortunately nearly all useful imports and exports are disabled in free versions. The user is forced to stay inside the free version.

Photoshop alone made the following rendering in its 3D mode. Your image was considered as a depth map. It's upside down here. Darker = higher.



BTW. What physical the photo actually presents? This question is only because we are curious here. I gave to it workname "Splitted_Chromosome.SVG"

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