To facilitate measurement of a shutter time lag of a camera.
In a display section having i display elements, when j display elements are caused to be in a first display state and (i-j) display elements are caused to be in a second display state which is darker than the first display state, the i display elements are caused to be a m-th display pattern. After a pattern continuation time TP has elapsed, in the m-th display pattern, k display elements in the j display elements in the first display state are caused to be in the second display state, and in the m-th display pattern, k display elements in (i-j) display elements which are in the second display state are caused to be in the first display state. Thus, a switching operation is sequentially executed to switch i display elements into a (m+1)-th display pattern. The camera takes images of the display section which is in execution of the switching operation in accordance with a shutter operation made on the camera synchronously with the switching operation. Thus, a shutter time lag is calculated based on the images taken by the camera.
| JP2010206520A | 2010-09-16 | |||
| JP2002290979A | 2002-10-04 | |||
| JP2010206520A | 2010-09-16 | |||
| JP2002290979A | 2002-10-04 |
| US20080002029A1 | 2008-01-03 |
Kazuhiko Miyasaka
Kazuaki Watanabe