/* Show backend computer vision for curious users */
void showCV() {
  rectMode(CORNER); 

  stroke(100);
  noFill();
  rect(roiCornerX, roiCornerY, roiWidth, roiHeight); // Outlines region of interest

  noFill();
  stroke(255, 0, 0);
  strokeWeight(3);
  for (Contour contour : contours) {
        beginShape();
        for (PVector p : contour.getPoints()) {
            vertex(p.x + roiCornerX, p.y + roiCornerY);
        }
       endShape(PConstants.CLOSE);                         // Draws outlines of moving objects
  }
  image(dst, roiCornerX + roiWidth, roiCornerY, roiWidth, roiHeight);  // Displays backend cv
  textSize(56);
  text("Count: " + count, 300, 600);    // COunts number of euglena in region of interest
}