docs: public RemoveBrownPtoN_F32 setK( /**/double fx, /**/double fy, /**/double skew, /**/double cx, /**/double cy ) {
  
  		this.fx = (float)fx;
  		this.fy = (float)fy;
  		this.skew = (float)skew;
  		this.cx = (float)cx;
  		this.cy = (float)cy;
  
  		// analytic solution to matrix inverse
  		a11 = (float)(1.0f/fx);
  		a12 = (float)(-skew/(fx*fy));
  		a13 = (float)((skew*cy - cx*fy)/(fx*fy));
  		a22 = (float)(1.0f/fy);
  		a23 = (float)(-cy/fy);
  
  		return this;
  	}