MVTools-pfmod

[StainlessS]

Further to above, a bit more weirdness.

Actually, weirdness on forward vectors when movement from right to left, but on backward vectors when movement left to right.

Here script to show more masks over several frames.

script (requires V.C. Mohan Grid plug if SHOWGRID=true)

MASKT=2        # 0, 2, 3 ONLY : 0=Motion, 2=Occlusion, 3=Horizontal motion
HFLIP=true     # Direction, true=Left to right
XSTEP=8        # Movement step size per frame of white movement moving over black
BLKSZ=4        # MAnalyse BlkSize
Weird=true     # Show Weird Occlusion masks
SHOWGRID=true # Show Grid, Req V.C. Mohan Grid Plugins.
#####################
##### END Config ####
#####################
CS="YV12"
Wid=960
Hit=48
DELTA=2
TIME=50.0
Steps=Wid/XStep
White=BlankClip(width=WID,height=HIT,Length=1,Color=$FFFFFF,Pixel_type=CS)
Black=White.BlankClip  srcS=Black.BlankClip(Length=0)
For(i=1,Steps-1) {
    W=White.Crop(0,0,i*XStep,0)  K=Black.Crop(0,0,Wid-W.Width,0)  Frm=StackHorizontal(K,W) srcS=srcS++Frm
}
srcS=(HFlip)?srcS.FlipHorizontal:srcS
srcE=SrcS.Loop(0,0,Delta-1)                                # Delete Delta frames, end interp src
OLap=(Weird)?2:Undefined
super=srcS.MSuper(pel=2,hpad=16,vpad=16,chroma=false)
fvec = MAnalyse(super, isb=false, blksize=BlkSz,Overlap=OLap,delta=Delta, truemotion=true,chroma=false)
bvec = MAnalyse(super, isb=true,  blksize=BlkSz,Overlap=OLap,delta=Delta, truemotion=true,chroma=false)
inter= srcS.MFlowInter(super, bvec,fvec, time=Time).Greyscale
mfv0 = srcS.MMask(fvec,kind=MaskT).Greyscale # n
mfvS1= mfv0.DuplicateFrame(0)     # n-1
mfv1 = mfv0.DeleteFrame(0)        # n+1
mfv2 = mfv1.DeleteFrame(0)        # n+2
mfv3 = mfv2.DeleteFrame(0)        # n+3
mfv4 = mfv3.DeleteFrame(0)        # n+4
mbv0 = srcS.MMask(bvec,kind=MaskT).Greyscale # n
mbvS1= mbv0.DuplicateFrame(0)     # n-1
mbv1 = mbv0.DeleteFrame(0)        # n+1
mbv2 = mbv1.DeleteFrame(0)        # n+2
mbv3 = mbv2.DeleteFrame(0)        # n+3
mbv4 = mbv3.DeleteFrame(0)        # n+4
DIR=(HFlip) ? " : ---->" : " : <----"
TXT=SrcS.BlankClip(Height=20,Length=1,Color=$404040).Subtitle(String(Delta,"Delta=%.0f")+String(Time," : Time=%.2f")+
    \ String(BLKSZ," : BLKSZ=%.0f")+String(XSTEP," : XSTEP=%.0f")+" : HFlip="+String(HFlip)+DIR)
StackVertical(srcS,SrcE,Inter,mfvS1,mbvS1,mfv0,mbv0,mfv1,mbv1,mfv2,mbv2,mfv3,mbv3,mfv4,mbv4)

COL=$FF00FF
(SHOWGRID)?grid(Lineint=8,Color=COL,bColor=COL,vbColor=COL):NOP
mType=mTyp(MaskT)
ARGS = "Delta,Time,XStep,HFlip,MType"
Last.GScriptClip("Fn(last, "+ARGS+")", local=true, args=ARGS)

Return StackVertical(TXT,Last).ConvertToRGB32

Function MTyp(Int n) {Return " Type="+Select(n,"Motion","Sad","Occlusion","Horizontal","Vertical","ColorMap")}

Function Fn(clip c,Int Delta,Float Time,Int XStep,Bool HFlip,String mType) {
    c    n=current_frame
    Hit=Height/15
    Steps=Width/XStep
    x=((n+1)*XStep) + (Delta*XStep/2)
    x=Min(x,(Steps-1)*XStep)
    x=HFlip?x:Width-1-x
    Subtitle(String(n,"SRC[n=%.0f] (1st interp srcS)")                 , Y=0.5*Hit,Align=5)
    Subtitle(String(n+Delta,"SRC[n+Delta=%.0f] (2nd interp srcE)")      , Y=1.5*Hit,Align=5)
    Subtitle(string(n+Delta*Time/100.0,"MFlowInter Predicted @ [%.2f]") , Y=2.5*Hit,Align=5)
    Subtitle(String(n-1,"FVEC[n-1=%.0f]")+mType,Y=3.5*Hit,Align=5)
    Subtitle(String(n-1,"BVEC[n-1=%.0f]")+mType,Y=4.5*Hit,Align=5)
    Subtitle(String(n+0,"FVEC[n+0=%.0f]")+mType,Y=5.5*Hit,Align=5)
    Subtitle(String(n+0,"BVEC[n+0=%.0f]")+mType,Y=6.5*Hit,Align=5)
    Subtitle(String(n+1,"FVEC[n+1=%.0f]")+mType,Y=7.5*Hit,Align=5)
    Subtitle(String(n+1,"BVEC[n+1=%.0f]")+mType,Y=8.5*Hit,Align=5)
    Subtitle(String(n+2,"FVEC[n+2=%.0f]")+mType,Y=9.5*Hit,Align=5)
    Subtitle(String(n+2,"BVEC[n+2=%.0f]")+mType,Y=10.5*Hit,Align=5)
    Subtitle(String(n+3,"FVEC[n+3=%.0f]")+mType,Y=11.5*Hit,Align=5)
    Subtitle(String(n+3,"BVEC[n+3=%.0f]")+mType,Y=12.5*Hit,Align=5)
    Subtitle(String(n+4,"FVEC[n+4=%.0f]")+mType,Y=13.5*Hit,Align=5)
    Subtitle(String(n+4,"BVEC[n+4=%.0f]")+mType,Y=14.5*Hit,Align=5)
    Return Last
}

Here showing white motion coming in from the left.

Mask=2, Occlusion (weirdness on backward vectors)


Mask=0, Motion (its a bit faint) [relevant for frame n, bvec n+0 and fvec n+delta(2)]


Mask=3, Horizontal Motion [relevant for frame n, bvec n+0 and fvec n+delta(2)]


Src frame 24 has stepped 2 * 8 pixels at frame 26, each little mark on grid are 8 pixels apart.