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    Best method for tracing a jpg image

    Scheduled Pinned Locked Moved Woodworking
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    • TIGT Offline
      TIG Moderator
      last edited by

      If the image file can be converted into a 'flattened' PNG file [using Gimp, Photoshop etc] and then a transparent alpha channel layer re-added and the unwanted background pixels deleted... then you can import it into your SKP model as an Image and then use ImageTrimmer [part of my SKMtools (note you need Java enabling and JAR files set to execute in Java and NOT to be opened in decompression-apps)].
      This will process it automatically, drawing the outline along the transparent edge pixels and only adding faces to the 100% opaque areas [using the image as a material] and finally smoothing the jaggedy edges into smoother curves.
      The resultant component's edges are auto-hidden, but they can easily be turned back on if you want to edit them further...
      So the resultant 'cutout' might do what you want?
      ImageTrimmer can work acceptably for suitable PNGs of people, trees, shrubs, etc...

      TIG

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      • M Offline
        mics_54
        last edited by

        uh..okay
        suddenly I feel like "penny" talking to "Sheldon" πŸ˜„

        ...actually I wondered if there was a way to automate the trace with some raster/vector software.

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        • Dave RD Offline
          Dave R
          last edited by

          The vectorizing programs I've tried all made very ragged vectors which translated into huge segment counts in SketchUp. If the image is suitable or made suitable for it, TIG's plugin would be great. For most of the tracing I need to do, it would take as long to make the image suitable as to just trace it and get it over with.

          Etaoin Shrdlu

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          • pbacotP Offline
            pbacot
            last edited by

            @mics_54 said:

            uh..okay
            suddenly I feel like "penny" talking to "Sheldon" πŸ˜„

            ...actually I wondered if there was a way to automate the trace with some raster/vector software.

            That is what TIG is offering in his plugin. However the first step is make the background transparent in an image editor if it is not already so, so that the software "knows" where to make the trace.

            There are automatic vector-izing programs but probably not what you want for a cut-out. Varying success from what I see.

            Looking at "Intarsia" it looks like these are linework patterns, not cut-out texture images, so I sense TIG's tool is not what you want. Probably drawing by mouse (or tablet) is going to be faster and cleaner.

            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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            • pilouP Offline
              pilou
              last edited by

              Auto Tracer on line
              and else a very cool one where there is a vectorizer inside ! 😎
              Expression 3( old creatures house) free ! Multilanguage
              Permit to make crazzy illustrations!
              Astonished as vectorial image! 😲
              By Graphinc

              http://forums.polyloop.net/attachment.php?attachmentid=1879&d=1083069896

              Inkscape has also one inside! Multilanguage

              Frenchy Pilou
              Is beautiful that please without concept!
              My Little site :)

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              • Dave RD Offline
                Dave R
                last edited by

                Pilou, would you show us the vector lines you get from that image? Put them into SketchUp.

                Etaoin Shrdlu

                %

                (THERE'S NO PLACE LIKE)

                G28 X0.0 Y0.0 Z0.0

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                • pilouP Offline
                  pilou
                  last edited by

                  Regulates inside expression 3

                  refulates.jpg

                  so more points! πŸ˜‰
                  So first play with colors on the original!

                  24 colors in the following skp file! πŸ˜„


                  refulates1.jpg


                  redfish1.zip

                  Frenchy Pilou
                  Is beautiful that please without concept!
                  My Little site :)

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                  • pilouP Offline
                    pilou
                    last edited by

                    I make a snaphot from the su forum!
                    With default parameters and without regulate anywhere in any progs that give that! (skp final file linked)
                    Inside Expression 3 (i have not the original expression file by graphinc! so snapshot above so JPG compression don't help! --> mutiply colors! )
                    You can of course modulate the start colors for have a more precise result!
                    (here only 4 colors! Suffisant if you want just the outlines! you can take till 40 color)

                    redfish1.jpg

                    You will have choice to export in different format Illustrator Ai ...
                    exportai.jpg

                    ...and EPS, PDF and FLASH

                    I had taken AI 7.0 then import inside Moi then export directly in format SKP πŸ˜‰
                    Inside Moi (who can accept also EPS, PDF )
                    redfishmoi.jpg

                    Moi export default parameters
                    redfishmoi1.jpg

                    Inside SKP : for a direct work without any regulates it's not so bad! πŸ˜‰
                    Funny the original black circle eyes has disapeared maybe black is the transparent color somewhere!
                    Expression 3 is a crazzy free prog! 😎
                    redfishsu.jpg

                    redfish.skp

                    Frenchy Pilou
                    Is beautiful that please without concept!
                    My Little site :)

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                    • M Offline
                      mics_54
                      last edited by

                      That is interesting on many levels and I bet it would be suitable for many artistic inflections.
                      Just to satisfy your curiosity etc

                      Pete's fish sign.jpg

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                      • M Offline
                        mics_54
                        last edited by

                        Pilou
                        that's a very nice trace! I will chek it out

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                        • pilouP Offline
                          pilou
                          last edited by

                          You have also Expression Designer 4 who is a smart version of expression 3 always free! πŸ˜‰

                          Else for your design drawing Moi has this on the next beta in PDF format! πŸ˜‰

                          Reamark the "large lines" not only on empty space but also Objects over objects!
                          For a more easy readable πŸ˜„

                          http://moi3d.com/forum/get_attachment.php?webtag=MOI&hash=9eb27b40171633cb3b4ab168f197f715&filename=3x silhouettes.png

                          Frenchy Pilou
                          Is beautiful that please without concept!
                          My Little site :)

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                          • M Offline
                            MARKTERREAU
                            last edited by

                            Where can a guy find the aforementioned BZ_Spline tools?
                            Thanks

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                            • Dave RD Offline
                              Dave R
                              last edited by

                              @markterreau said:

                              Where can a guy find the aforementioned BZ_Spline tools?

                              In the Extension Store: https://sketchucation.com/pluginstore?pln=BezierSpline

                              Best would be to install the Sketchucation Extension Store tool under Resources at the top of this page. Then use it to install extensions hosted here.

                              There's also FredoSpline which has more options than the older Bezier Spline.

                              Etaoin Shrdlu

                              %

                              (THERE'S NO PLACE LIKE)

                              G28 X0.0 Y0.0 Z0.0

                              M30

                              %

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