Hello Peter, It is possible to use shaders for this purpose if you don't have to use only pix_ objects. For exemple, get the result of a dot product between the normalized background color and the normalized texels colors. Then use a threshold to determine if a pixel need to be transparent or not (you can even smooth this result if needed for a better result). ++
Jack Le 06/02/2018 à 17:53, Peter P. a écrit : > Hi list, > > just wondering if anyone has looked into a way to subtract a background > in Gem pixes using a hybrid approach between frame difference > [pix_movement] and difference to a static snapshot [pix_background]. I > want to be able to detect object in front of a background also during > slow light condition changes or unsupervised operation in say a gallery > context. > I can remember that EyesWeb had an adaptive background subtraction, that > did possibly time-average a series of images to derive the background > snapshot. Has anyone done anything more fancy in Gem than the two > wonderful objects above offer? > > thanks for all ideas! > Peter > > _______________________________________________ > Pd-list@lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > _______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list