Specify an area within the measurement area that you do not want to be processed. The filled area will be masked in the rectangle specified as the measurement area and will not be subject to the image processing.填滿的區域將會在指定為搜尋視窗的長方形中被遮罩,而且將不會接受影像處理。若要變更執行時的遮罩,請按一下[編輯]按鍵。