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    Kinect for background subtraction

    How To... ?
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    • DusX
      DusX Tech Staff last edited by

      If anyone would like to try/test this

      https://github.com/rwebber/kinect2share
      Please do and let me know how it goes.

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      • Skulpture
        Skulpture Izzy Guru last edited by

        Thanks Ryan. I am going to ask the dumb question here, but when I download something from github it comes a zip. When I unzip it its always just lots of files and code like documents. Am I doing something wrong; or should this be an application ".app" ?

        Graham Thorne | www.grahamthorne.co.uk
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        • DusX
          DusX Tech Staff last edited by

          The 'release' zip has the app 'exe'. This is windows only.

          The izzy sample file is in the code files... I need to update that... i forgot to add it to the release.

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          • Skulpture
            Skulpture Izzy Guru last edited by

            Thats ok. Just wanted to check.

            Graham Thorne | www.grahamthorne.co.uk
            RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
            RIG 2: Laptop Dell G15: Windows 11, Intel i9 12th Gen. RTX3070ti, 16G RAM (DDR5), 2 x NVME M.2 SSD.
            RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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            • E
              eratatat last edited by

              Hi there,

              do you know if there is an alternative for MAC to Daniel Shiffman's library in processing?
              While testing the file [@jhoepffner](http://troikatronix.com/troikatronixforum/profile/jhoepffner) I got an error, processing cannot find the device (kinect v.2). 
              It seems like mac and kinect v.2 are not working well. 
              Any suggestions how to solve this?
              Thanks
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              • E
                eratatat last edited by

                Hi there,

                do you know if there is an alternative for MAC to Daniel Shiffman's library in processing?
                While testing the file [@jhoepffner](http://troikatronix.com/troikatronixforum/profile/jhoepffner) I got an error, processing cannot find the device (kinect v.2). 
                It seems like mac and kinect v.2 are not working well. 
                Any suggestions how to solve this?
                Thanks
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                • jhoepffner
                  jhoepffner last edited by

                  Hello,

                  I you follow the procedure of libraries install (as described in Shiffman post, mainly freenect), it will work well.
                  some things to note
                  – you need a USB3 connection
                  – sometime you need to unplug/replug the kinect
                  – kinect V2 on mac gives you rawDeep info, color image, IR image but no skeleton infos.
                  I used it on a an installation one month ago, Processing to Isadora to Processing, no problem.
                  https://vimeo.com/194632092
                  I do not know of other working kinect Processing library on mac.
                  Millumin is able to have skeleton infos on mac but no way to output the info to Isadora…
                  Hope that helps

                  Jacques Hoepffner http://hoepffner.info
                  GigaByte 550b / Ryzen 7 3800X / Ram 64 Go / RTX 3090 24 Go / SSD 2 To / raid0 32 To
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                  • DusX
                    DusX Tech Staff last edited by

                    I have made a few updates to this app:
                    https://github.com/rwebber/kinect2share
                    It now outputs the Hand state (is the right or left hand open or closed) as well as a number of other small things.

                    The black and white mask (silhouette) is available via spout by default, as well, the 'green screen' type feed is there, incase you want live background subtraction.

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                    • E
                      eratatat last edited by

                      @jhoepffner the problem I got with Shiffman's library does happen, I don't know why and how, this has developed into an unsolvable mystery.

                      https://github.com/shiffman/OpenKinect-for-Processing/issues/80
                      A couple of questions below, if you have the time, I would really appreciate your feedback.
                      I will be using windows instead with the other two libraries, can I ask you, will your processing patch work with the other processing libraries? 
                      Also, I will be compositing the final video on Resolume, so I was thinking of sending the image from Isadora to Resolume via Syphon. Is it possible to keep the alpha values intact when importing the syphon image to Resolume. 
                      A huge thanks for your help. 
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                      • E
                        eratatat last edited by

                        @DusX thanks for sharing. As I'm totally new to windows, I'll ask you something a bit dumb, what do I have to do to run this app? 

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                        • jhoepffner
                          jhoepffner last edited by

                          @eratatat

                          – first question: I am more accustomed to MacOs, but I use windows on Bootcamp and I tried Kinect on W and M, with Processing and Touch Designer. For what I see it's much better implemented in Windows and with Windows Processing Kinect Library, you can obtain directly a mask to make background replacement. But you have to struggle with Spout who is less easy to use that Syphon (DirectX dependent, Graphic card dependent…).
                          For my actual usage (https://vimeo.com/194632092) I use Processing and Isadora on MacOs with Syphon to pass image in both ways).
                          – To use my patch with other library, you have to change all what is related to the library and I dont know how to obtain "getRawDepth"
                          – For the second question, if you use Windows, you dont use Syphon but Spout… Concerning Syphon, if you declare your background in Processing with alpha mask (as color(0, 0, 0, 0), you send alpha with Syphon but I dont know about Resolume and Spout…
                          In Millumin you have a quite easy way to obtain alpha mask from Kinect, give a try to the beta release.
                          Jacques

                          Jacques Hoepffner http://hoepffner.info
                          GigaByte 550b / Ryzen 7 3800X / Ram 64 Go / RTX 3090 24 Go / SSD 2 To / raid0 32 To
                          MBP 13' i5 2.6 Ghz 16 Go / Intel Iris / macOs 10.11.6 / izzy 2.6.1 + 3.0.3b2
                          MBP 15' i7 2.6 Ghz 16 Go / GTX 650M 1Go/ MacOs10.13.3 / Izzy 2.6.1
                          MSI GS65 i7 3.6 Ghz 32 Go / GTX 1070 8 Go / Windows 10 / Izzy 3.0.3b2

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                          • DusX
                            DusX Tech Staff last edited by

                            @Eratatat Download the release (un zip it) And open the exe/application file. All required libraries are included. Note: both syphon and Spout support transfer of video with alpha. This image shows the alpha cutout video inside the openframeworks app and inside Isadora. https://camo.githubusercontent.com/bfeb9fa759cc5f984491d0daecd84cd878211521/68747470733a2f2f73636f6e74656e742d79797a312d312e78782e666263646e2e6e65742f762f74312e302d392f31343532303535355f3632383434313634373332363639395f323030393038363034333338343439333735375f6e2e706e673f6f683d3133626138383034353261333531393363386264666163646161643639363365266f653d3538414333354633

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                            • E
                              eratatat last edited by

                              @DusX
                              I'm sorry I can't find the release zip. I download the zip folder from github. Nothing there.
                              Is there a way to calibrate what bit we take from the depth data? I'd like to do quite a detailed background subtraction.
                              Many thanks

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                              • E
                                eratatat last edited by

                                Ok found the release section. Sorry! don't really know how to use github.

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                                • E
                                  eratatat last edited by

                                  Ran the app, it says it can't run because MSVCP140.dll is not installed

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                                  • DusX
                                    DusX Tech Staff last edited by

                                    This is part of the Microsoft c++ redistributable... 

                                    https://www.microsoft.com/en-ca/download/details.aspx?id=48145

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                                    • E
                                      eratatat last edited by

                                      Thanks guys.

                                      First of all @DusX, your app is a great tool for simple background subtraction. 
                                      Unfortunately, I'm doing something very specific, filming the person top down, and they're laying on the floor. 
                                      It seems like the BodyTrackImage cannot work in this setting, as the person is very close to the floor.
                                      Is there a way to set the kinect up so that it scans only a segment of the z axis? 
                                      @[jhoepffner](http://troikatronix.com/troikatronixforum/profile/15/jhoepffner), I tried to implement your example using Lengeling's library and Spout, but can't seem to make it work. depthWidth cannot be resolved. 
                                      Any ideas?
                                      Thanks
                                      ET
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                                      • E
                                        eratatat last edited by

                                        import spout.*;
                                        import KinectPV2.*;
                                        PImage img;
                                        PGraphics canvas; 
                                        PGraphics canvas2;
                                        KinectPV2 kinect;
                                        Spout spout;
                                        Spout spout2;
                                        int thresholdH = 1200; // max distance (in mm)
                                        int thresholdL = 0; // min distance (in mm)
                                        void setup() {
                                          size(640, 360, P3D);
                                          textureMode(NORMAL);
                                          kinect = new KinectPV2(this);
                                          kinect.enableDepthImg(true);
                                          kinect.enableBodyTrackImg(true);
                                          kinect.enableColorImg(true);
                                          kinect.init();
                                          canvas = createGraphics(1280, 720, P3D);
                                          canvas2 = createGraphics(1280, 720, P3D);
                                          img = loadImage("SpoutLogoMarble3.bmp");
                                            spout = new Spout(this);
                                              spout2 = new Spout(this);
                                          spout.createSender("rgb image");
                                          spout2.createSender("mask");
                                          
                                        } 
                                        void draw()  { 
                                        background(0, 90, 100);
                                        noStroke();
                                        canvas.beginDraw();
                                          canvas.image(kinect.getColorImage(), 0, 0, 1920, 1080);
                                              canvas.endDraw(); 
                                              
                                                  spout.sendTexture(canvas);
                                                  
                                        int [] rawData = kinect.getRawDepthData();
                                         //read kinect depth
                                          canvas2.beginDraw();
                                          canvas2.loadPixels();
                                          // draw the depth image in white between high and low limits
                                          for (int x = 0; x < kinect.depthWidth; x++) {
                                            for (int y = 0; y < kinect.depthHeight; y++) {
                                              int offset = x + y * kinect.depthWidth;
                                              int rawDepth = rawData[offset];
                                              int pix = x + y*img.width;
                                              if (rawDepth > thresholdL && rawDepth < thresholdH) {
                                                canvas2.pixels[pix] = color(255, 255, 255, 255); //draw white inside limits
                                              } else {
                                                canvas2.pixels[pix] = color(0, 0, 0, 0); //draw black outside limits
                                              }
                                            }
                                          }
                                          canvas2.updatePixels();
                                          canvas2.endDraw();
                                            spout2.sendTexture(canvas2);
                                            
                                        }
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                                        • DusX
                                          DusX Tech Staff last edited by

                                          The app can be easily changed/added to, to supply the depth image. Perhaps using levels and then lumakey could provide something useful...

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                                          • fubbi
                                            fubbi last edited by

                                            Hi

                                            This was a processing app I made a few years back. It created a black and white mask from the kinect depth mask and sent it out via syphon. I have not opened it for a while, but it worked fine and maybe there is something useful in there.
                                            @[eratatat](http://troikatronix.com/troikatronixforum/profile/6259/eratatat) there is a threshold value for the mask in the code attached so you can define the z depth start and end of the mask, I cant say if it is sensitive enough for somebody lying on floor. I remember mapping the threshold to osc, so I could tweak it from isadora, i.e move it back and forth.
                                            hope it helps you
                                            yours
                                            fubbi

                                            7630f9-trapping_v12.pde.zip

                                            Mac M2 Ultra, 64gb — Berlin

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