function OpencvExt() {
    cv.DMatchVector.prototype.sort = function () {
        for (let i = 0; i < this.size(); i++) {
            for (let j = 0; j < this.size(); j++) {
                if (this.get(i).distance < this.get(j).distance) {
                    let x = this.get(i);
                    let y = this.get(j);
                    this.set(i, y);
                    this.set(j, x);
                }
            }
        }
    }

    cv.DMatchVector.prototype.resizeMe=function(length){
        let matchesResized = new cv.DMatchVector();
        for (let i = 0; i < length; i++) {
            matchesResized.push_back(this.get(i));
        }
        return matchesResized;
    }
}