i am trying to track a video with a shape, and for the aesthetics i would like the shape to leave a trail behind and blur/fade away; however if i draw a transparent background and apply the blur filter the framerate drops dramatically, is there a bitmap matrix equivalent to those effects in Processing?

1. 
   void draw() {
   
    noStroke();
    fill(0,0,0,1);
    rect(0,0,width, height);
   // Let's draw the raw location
     PVector v1 = tracker.getPos();
        fill(255);
        ellipse(v1.x,v1.y,20,20);
          if (!imgBg){filter(BLUR,0.65);}
    /* pg = createGraphics(35, 35, P3D);
     pg.beginDraw();
   pg.stroke(255);
    fill(5,200,200);
     ellipse(v1.x-5,v1.y -20,15,15);
   pg.strokeWeight(6);
   if (!imgBg){filter(BLUR,0.65);}
     pg.endDraw();
     */