公开(公告)号：US07493035B2

公开(公告)日：2009-02-17

申请号：US11163714

申请日：2005-10-28

申请人： Lee-Ren Kuo ,  Jian-Yu Lin ,  Feng-Chi Chang

发明人： Lee-Ren Kuo ,  Jian-Yu Lin ,  Feng-Chi Chang

IPC分类号： G03B13/00 ,  G03B17/00

CPC分类号： G03B13/20 ,  G03B15/05 ,  G03B2215/05 ,  H04N5/23212

摘要： A method for focusing by using a pre-flash is provided. The method includes the following steps. First, the image sensor captures a first image of the object, wherein the average brightness of the first image is calculated to be Y0. Next, the image sensor captures a second image of the object with the aid of a first pre-flash having a first energy, wherein the average brightness of the second image is calculated to be Y1. Afterwards, the image sensor captures a third image of the object with the aid of a second pre-flash having a second energy, wherein the average brightness of the third image is calculated to be Y2. Then, the distance D to the object is calculated according to the brightness Y0 and the difference ΔY between Y1 and Y2. Finally, the image sensor adjusts the focus according to the distance D.

摘要翻译： 提供了一种通过使用预闪光进行聚焦的方法。 该方法包括以下步骤。 首先，图像传感器捕获对象的第一图像，其中第一图像的平均亮度被计算为Y0。 接下来，图像传感器借助于具有第一能量的第一预闪光捕获对象的第二图像，其中第二图像的平均亮度被计算为Y1。 之后，图像传感器借助于具有第二能量的第二预闪光捕捉对象的第三图像，其中第三图像的平均亮度被计算为Y2。 然后，根据亮度Y0和Y1和Y2之间的差值DeltaY计算到物体的距离D. 最后，图像传感器根据距离D调整焦点。

公开(公告)号：US20060216012A1

公开(公告)日：2006-09-28

申请号：US11163714

申请日：2005-10-28

申请人： Lee-Ren Kuo ,  Jian-Yu Lin ,  Feng-Chi Chang

发明人： Lee-Ren Kuo ,  Jian-Yu Lin ,  Feng-Chi Chang

IPC分类号： G03B13/00

CPC分类号： G03B13/20 ,  G03B15/05 ,  G03B2215/05 ,  H04N5/23212

摘要： A method for focusing by using a pre-flash is provided. The method includes the following steps. First, the image sensor captures a first image of the object, wherein the average brightness of the first image is calculated to be Y0. Next, the image sensor captures a second image of the object with the aid of a first pre-flash having a first energy, wherein the average brightness of the second image is calculated to be Y1. Afterwards, the image sensor captures a third image of the object with the aid of a second pre-flash having a second energy, wherein the average brightness of the third image is calculated to be Y2. Then, the distance D to the object is calculated according to the brightness Y0 and the difference ΔY between Y1 and Y2. Finally, the image sensor adjusts the focus according to the distance D.

摘要翻译： 提供了一种通过使用预闪光进行聚焦的方法。 该方法包括以下步骤。 首先，图像传感器捕获对象的第一图像，其中第一图像的平均亮度被计算为Y 0 0。 接下来，图像传感器借助于具有第一能量的第一预闪光捕获对象的第二图像，其中第二图像的平均亮度被计算为Y 1。 之后，图像传感器借助于具有第二能量的第二预闪光捕捉对象的第三图像，其中第三图像的平均亮度被计算为Y 2 2。 然后，根据亮度Y 0 0和Y 1和Y 2 2之间的差ΔY来计算到物体的距离D. 最后，图像传感器根据距离D调整焦点。