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const cv = require('../');

const { grabFrames, drawRectAroundBlobs } = require('./utils');

const bgSubtractor = new cv.BackgroundSubtractorMOG2();

const delay = 50;

grabFrames('../data/traffic.mp4', delay, (frame) => {

const foreGroundMask = bgSubtractor.apply(frame);

const iterations = 2;

const dilated = foreGroundMask.dilate(

cv.getStructuringElement(cv.MORPH_ELLIPSE, new cv.Size(4, 4)),

new cv.Point(-1, -1),

iterations

);

const blurred = dilated.blur(new cv.Size(10, 10));

const thresholded = blurred.threshold(200, 255, cv.THRESH_BINARY);

const minPxSize = 4000;

drawRectAroundBlobs(thresholded, frame, minPxSize);

cv.imshow('foreGroundMask', foreGroundMask);

cv.imshow('thresholded', thresholded);

cv.imshow('frame', frame);

});