| 摘要 |
PURPOSE:To shorten time for converting a window and to improve efficiency for reading shadow by converting the window based on a window value set concerning an objective area set in a partial area in a displayed picture. CONSTITUTION:A conversion means 20 converts the window based on the window value set concerning the objective area set to the partial area in the picture displayed at a display part 13. Preferably, the window is converted later concerning all the picture based on the window value. Thus, time for changing the window can be shortened, it is not necessary to set the objective area and to convert the window repeatedly, operability is improved, and efficiency for reading shadow is improved. |
