公开(公告)号：US20100271534A1

公开(公告)日：2010-10-28

申请号：US12512746

申请日：2009-07-30

Applicant: Rein-Wein LIN

Inventor： Rein-Wein LIN

IPC: H04N5/225

CPC classification number: H04N5/2254 ,  G02B3/14 ,  G02B27/0075 ,  H04N1/195 ,  H04N1/19594

Abstract: A document camera includes a liquid lens and an extended depth of field (referred to as EDoF) module. The liquid lens adjusts its diopter value in accordance with a voltage value provided by a control circuit, and is used to form an image with a longer image distance from an object with a shorter image distance. The object and the image both are located at the same side of the liquid lens. The EDoF module is located behind the liquid lens to process an image by using a wavefront coding technique, and comprises a wavefront encoder used for performing wavefront coding onto the image; a signal processor for converting the image which has been wavefront-coded into digital signals; and a digital image processor for converting the digital signals into image signals.

Abstract translation: 文件照相机包括液体透镜和扩展景深（称为EDoF）模块。 液体透镜根据由控制电路提供的电压值调节其屈光度值，并且用于形成具有距图像距离较短的物体具有较长图像距离的图像。 物体和图像都位于液体透镜的同一侧。 EDoF模块位于液体透镜后面，通过使用波前编码技术来处理图像，并且包括用于对图像执行波前编码的波前编码器; 用于将已被波前编码的图像转换成数字信号的信号处理器; 以及用于将数字信号转换为图像信号的数字图像处理器。