公开(公告)号：US20130128057A1

公开(公告)日：2013-05-23

申请号：US13678315

申请日：2012-11-15

Applicant: Electronics and Telecommunications Research In ,  National University of Sciences & Technology

Inventor： Yong Ju CHO ,  Ji Hun CHA ,  Myung Seok KI ,  Seong Yong LIM ,  Yong Ju LEE ,  Seung Kwon BEACK ,  Jin Woong KIM ,  Rehan HAFIZ ,  Muhammad Murtaza KHAN ,  Atif AHMED ,  Arshad ALI

IPC: H04N17/04

CPC classification number: H04N17/04 ,  H04N9/3185 ,  H04N9/3194

Abstract: Provided is a geometric correction apparatus and method based on a recursive Bezier patch sub-division. A geometric correction method may include: receiving, from a camera, a first image that is obtained by photographing a black screen that is projected by a projector onto a projection surface; receiving, from the camera, a second image that is obtained by photographing a predetermined pattern that is projected by the projector onto the projection screen; generating a third image by subtracting the first image from the second image; and performing geometric correction with respect to the predetermined pattern to correct a distortion between the predetermined pattern and the third image.

Abstract translation: 提供了一种基于递归贝塞尔补丁子分割的几何校正装置和方法。 几何校正方法可以包括：从相机接收通过将由投影仪投影的黑屏拍摄到投影面上而获得的第一图像; 从照相机接收通过将由投影仪投影的预定图案拍摄到投影屏幕上而获得的第二图像; 通过从第二图像中减去第一图像来产生第三图像; 以及对所述预定图案执行几何校正，以校正所述预定图案与所述第三图像之间的失真。

公开(公告)号：US20130194292A1

公开(公告)日：2013-08-01

申请号：US13658039

申请日：2012-10-23

Applicant: Electronics and Telecommunications Research In

Inventor： Yong Ju CHO ,  Yong Ju LEE ,  Seung Kwon BEACK ,  Ji Hun CHA ,  Seong Yong LIM ,  Myung Seok KI ,  Joo Myoung SEOK ,  Jin Woong KIM ,  Muhammad Murtaza KHAN ,  Rehan HAFIZ ,  Haris ANIS ,  Mutahir LATIF ,  Ashar RASUL ,  Arshad ALI

IPC: G09G5/06

CPC classification number: H04N9/3147 ,  G06F3/1446 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/0693 ,  H04N9/3182 ,  H04N9/3194

Abstract: An apparatus and a method for correcting colors of an image projection device are provided. The method includes: acquiring a photographed image by photographing a sample image projected on projection surface; generating input-output color information for n regions, based on color values of a block in the sample image and corresponding color values of the block in the photographed image; selecting one of the n regions of photographed images as a reference region; generating look-up tables (LUTs) for non-reference regions, based on the reference region and the input and output color information; and correcting colors of input images to be projected by the image projection device using the look-up tables, thereby minimizing color difference of the input images on the projection surface for both intra and inter projection device color correction while simplifying the correction procedure.

Abstract translation: 提供了一种用于校正图像投影装置的颜色的装置和方法。 该方法包括：通过拍摄投影在投影面上的样本图像来获取拍摄图像; 基于样本图像中的块的颜色值和所拍摄图像中的块的对应颜色值，生成n个区域的输入输出颜色信息; 选择拍摄图像的n个区域中的一个作为参考区域; 基于参考区域和输入和输出颜色信息产生用于非参考区域的查找表（LUT）; 并且通过使用查找表来校正由图像投影设备投影的输入图像的颜色，从而使简化校正过程的同时投影设备颜色校正的投影面上的输入图像的色差最小化。