Re: [PD] unclamped pix_subtract?
pix_diff gives the absolute value of the right image subtracted from the left. On Mon, Jul 14, 2008 at 4:08 PM, Spencer Russell < [EMAIL PROTECTED]> wrote: > I'm trying to implement a background subtractor using pix_buffer to > store the reference frame, and then subtracting it from the live video > input, then using that subtraction as an alpha mask for the live > video. The problem is that pix_subtract clamps the output at 0, but I > need it to not clamp, and then I can take the absolute value. Is there > a way to do unclamped subtraction of pix objects in GEM? > > thanks, > spencer > > ___ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] unclamped pix_subtract?
Never mind, it looks like pix_diff does the subtraction and the absolute value. On Mon, Jul 14, 2008 at 5:08 PM, Spencer Russell <[EMAIL PROTECTED]> wrote: > I'm trying to implement a background subtractor using pix_buffer to > store the reference frame, and then subtracting it from the live video > input, then using that subtraction as an alpha mask for the live > video. The problem is that pix_subtract clamps the output at 0, but I > need it to not clamp, and then I can take the absolute value. Is there > a way to do unclamped subtraction of pix objects in GEM? > > thanks, > spencer > ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] unclamped pix_subtract?
I'm trying to implement a background subtractor using pix_buffer to store the reference frame, and then subtracting it from the live video input, then using that subtraction as an alpha mask for the live video. The problem is that pix_subtract clamps the output at 0, but I need it to not clamp, and then I can take the absolute value. Is there a way to do unclamped subtraction of pix objects in GEM? thanks, spencer ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
