public void setBounding(int frameNumber, RectangleF boundingBox, float scale, PointF translation)
{
RectangleF inverseScaleBoundingBox = boundingBox.scaleBound(1 / scale, new PointF(-translation.X / scale, -translation.Y / scale));
var ob = new RectangleLocationMark(frameNumber, inverseScaleBoundingBox);
objectMarks[frameNumber] = ob;
}