公开(公告)号：US5253286A

公开(公告)日：1993-10-12

申请号：US839903

申请日：1992-02-21

Applicant: Shoichi Sano ,  Syogo Nakamura

Inventor： Shoichi Sano ,  Syogo Nakamura

IPC: H04M11/06 ,  H04N5/232 ,  H04N7/14 ,  H04M11/00

CPC classification number: H04N7/142

Abstract: The television camera of a video telephone set can easily be focused on the image of an object, such as a sheet of paper, through an inexpensive focusing apparatus. An indication corresponding to the size of the sheet is displayed on a display unit. The size of the displayed indication is determined depending on the distance, as detected by a zoomed distance detector, by which the lens of the television camera is zoomed. The position of the television camera is moved with respect to the object until the edges of the sheet are aligned with the indication displayed on the display screen of the display unit. When the edges of the sheet are aligned with the displayed indication, the television camera is sharply focused on the displayed image of the object. The size of the displayed indication, which indicates the actual size of the sheet, is determined based on an inputted sheet size and the detected distance by which the lens is zoomed. The television camera can thus be focused on the displayed image with ease.

Abstract translation: 视频电话机的电视摄像机可以通过廉价的聚焦装置容易地聚焦在诸如一张纸的物体的图像上。 在显示单元上显示与纸张的尺寸对应的指示。 所显示的指示的大小根据由缩放距离检测器检测到的距离来确定，通过该距离，电视摄像机的镜头被放大。 电视摄像机的位置相对于物体移动，直到片材的边缘与显示在显示单元的显示屏幕上的指示对准。 当纸张的边缘与显示的指示对齐时，电视摄像机被锐利地聚焦在被显示的物体的图像上。 基于输入的纸张尺寸和检测到的透镜缩放的距离来确定表示纸张的实际尺寸的显示指示的尺寸。 因此，电视摄像机可以容易地集中在显示的图像上。