公开(公告)号：US06453124B2

公开(公告)日：2002-09-17

申请号：US09815977

申请日：2001-03-22

申请人： Yasuhiro Morimoto ,  Takeru Butsuzaki ,  Kazuhiko Yukawa ,  Hiroaki Kubo

发明人： Yasuhiro Morimoto ,  Takeru Butsuzaki ,  Kazuhiko Yukawa ,  Hiroaki Kubo

IPC分类号： G03B1336

CPC分类号： H04N5/23212 ,  G02B7/28 ,  H04N5/23293

摘要： At power-on, a digital camera starts to operate with a display unit off (state S1). At a subsequent half shutter press of a shutter button, a quick return mirror is flipped down and phase difference AF is performed with live view display off (state S3). At a subsequent full press of the shutter button, the digital camera enters an image capture operation. With a quick return mirror in the up position, a focusing lens is moved to its in-focus, front focus and rear focus positions, at each of which contrast in an AF area of predetermined partial portion of an image is obtained for comparison to select a position of the focusing lens with maximum contrast (state S4). Then, image data is obtained and recorded on a memory card (state S5). With the above processing, the digital camera can perform autofocusing, as circumstances demand, by a contrast AF method.

摘要翻译： 上电时，数码相机开始关闭显示单元（状态S1）。 在随后的半快门按下快门按钮时，快速返回镜被翻转，并且实时取景显示关闭（状态S3）执行相位差AF。 随后完全按下快门按钮，数码相机进入图像捕捉操作。 在向上位置的快速返回镜中，将聚焦透镜移动到其对焦，前焦点和后焦点位置，在每个处获得图像的预定部分部分的AF区域中的对比度以进行比较以选择 具有最大对比度的聚焦透镜的位置（状态S4）。 然后，获得图像数据并将其记录在存储卡上（状态S5）。 通过上述处理，数码相机可以根据情况需要通过对比度AF方式进行自动对焦。