| 摘要 |
<p>PURPOSE:To enlarge and reduce a tube surface window on a tube surface by updating a tube window coordinate value according to the specified enlargement/ reduction quantities as to the plane corresponding to a specified tube window. CONSTITUTION:When the tube surface window (TW) executes the multiwindow display (MWD), the TW setting plane is recognized if the optional position of the window is specified and inputted from a tube surface window specifying part 21. Next, if a tube surface window enlargement/reduction specifying part 22 specifies and inputs the enlargement/reduction, the coordinates of the recognized TW are updated to enlarge/reduce, and only a bit in a TW area becomes effective. With the continuation of the input, the enlarged and reduced TW coordinates are continuously calculated. On the other hand, a video interface VIF 5 always executes the MWD according to the TW coordinate of tube surface window coordinates TB 9 in a high speed, so the smooth enlargement/ reduction of the optional window is attainable if the coordinates of the TW change continuously.</p> |
