公开(公告)号：US20080298718A1

公开(公告)日：2008-12-04

申请号：US11756517

申请日：2007-05-31

Applicant: Che-Bin Liu ,  Jing Xiao

Inventor： Che-Bin Liu ,  Jing Xiao

IPC: G06K9/36

CPC classification number: G06T7/33 ,  G06T2200/32 ,  G06T2207/10008 ,  G06T2207/20164 ,  G06T2207/30176

Abstract: Disclosed are embodiments of systems and methods to stitch two or more images together into a composite image. By finding matching point pairs for a pair of images, a homography transform may be obtained for the pair of images. The homography transform may be used to generate a composite image of the image pair. In an embodiment, the process of identifying a homography transform may be iterated. In an embodiment, when forming the composite image, the transformed foreground regions may be selected such that there is no intersection of foreground pixel regions. In an embodiment, foreground pixel regions on the border of an image may be removed. The resulting composite image is a larger image generated from the selected regions from the input images. In embodiments, the process may be repeated for sets of images with more than two images.

Abstract translation: 公开了将两个或多个图像拼接成合成图像的系统和方法的实施例。 通过找到一对图像的匹配点对，可以获得该对图像的单应变换。 单变形变换可用于生成图像对的合成图像。 在一个实施例中，可以重复识别单变形变换的过程。 在一个实施例中，当形成合成图像时，可以选择变换的前景区域，使得不存在前景像素区域的交集。 在一个实施例中，可以去除图像边界上的前景像素区域。 所得到的合成图像是从输入图像从所选择的区域生成的较大图像。 在实施例中，对于具有多于两个图像的图像集合可以重复该过程。

公开(公告)号：US20070217701A1

公开(公告)日：2007-09-20

申请号：US11691418

申请日：2007-03-26

Applicant: Che-Bin Liu ,  Anoop Bhattacharjya

Inventor： Che-Bin Liu ,  Anoop Bhattacharjya

IPC: G06K9/36

CPC classification number: G06K9/38 ,  G06K2209/011 ,  H04N1/409

Abstract: Disclosed are embodiments of systems and methods to generate a composite image from an captured image, such as from a whiteboard, chalkboard, paper, card, poster, sign, or the like. Systems and methods are disclosed for generating a foreground image layer and mask layer, which enables high-quality and high-ratio document compression. In embodiments, a foreground image layer and mask layer may be generated by identifying non-background pixels in the captured image.

Abstract translation: 公开了从捕获的图像（例如从白板，黑板，纸张，卡片，海报，标志等）生成合成图像的系统和方法的实施例。 公开了用于生成前景图像层和掩模层的系统和方法，其实现了高质量和高比率的文档压缩。 在实施例中，可以通过识别捕获的图像中的非背景像素来生成前景图像层和掩模层。

公开(公告)号：US07936923B2

公开(公告)日：2011-05-03

申请号：US11848907

申请日：2007-08-31

Applicant: Che-Bin Liu ,  Jing Xiao

Inventor： Che-Bin Liu ,  Jing Xiao

IPC: G06K9/34

CPC classification number: G06K9/38 ,  G06K2209/01

Abstract: Disclosed are embodiments of systems and methods for suppressing the background of an image. In embodiments, the number of foreground pixels or background pixels within a neighborhood of an identified background pixel may be compared against an aggressiveness threshold. Responsive to the number of foreground pixels within a neighborhood of an identified background pixel not exceeding an aggressiveness threshold, the color of the identified background pixel may be changed to an average local background color. Alternatively, responsive to the number of background pixels within a neighborhood of an identified background pixel exceeding an aggressiveness threshold, the color of the identified background pixel may be changed to an average local background color. In embodiments, additional processes may be performed on the image including, but not limited to, color adjusting, filtering, image enhancing, compression, format conversion, watermarking, special effects, video editing, etc.

Abstract translation: 公开了用于抑制图像背景的系统和方法的实施例。 在实施例中，可以将识别的背景像素的邻域内的前景像素或背景像素的数量与侵略性阈值进行比较。 响应于不超过攻击性阈值的所识别的背景像素的邻域内的前景像素的数量，所识别的背景像素的颜色可以改变为平均的本地背景颜色。 或者，响应于所识别的背景像素的邻域中的背景像素的数量超过侵略性阈值，所识别的背景像素的颜色可以被改变为平均的本地背景颜色。 在实施例中，可以对图像执行附加处理，包括但不限于颜色调整，滤波，图像增强，压缩，格式转换，水印，特殊效果，视频编辑等。

公开(公告)号：US07095401B2

公开(公告)日：2006-08-22

申请号：US10001553

申请日：2001-10-31

Applicant: Che-Bin Liu ,  Visvanathan Ramesh ,  Bernhard Geiger

Inventor： Che-Bin Liu ,  Visvanathan Ramesh ,  Bernhard Geiger

IPC: G09G5/00

CPC classification number: G06F3/017 ,  G06K9/00335

Abstract: A method for determining a gesture includes determining a change in a background of an image from a plurality of images, determining a object in the image, determining a trajectory of the object through the plurality of images, and classifying a gesture according to the trajectory of the object.

公开(公告)号：US07783117B2

公开(公告)日：2010-08-24

申请号：US11691339

申请日：2007-03-26

Applicant: Che-Bin Liu ,  Anoop K Bhattacharjya

Inventor： Che-Bin Liu ,  Anoop K Bhattacharjya

IPC: G06K9/36 ,  G06K9/46

CPC classification number: H04N1/409 ,  G06K9/38 ,  G06K2209/01

Abstract: Disclosed are embodiments of systems and methods to generate background and foreground images for a document, which enables high-quality and high-ratio document compression. In embodiments, high-accuracy layer processing enables text enhancement, paper color removal, and many other advanced image analysis and processing. Embodiments of the systems support several operation modes and its many parameters, such as layer compression ratios, image segmentation, and modulized image processing, may be adjusted to generate optimal compressed files for different purposes.

Abstract translation: 公开了用于为文档生成背景和前景图像的系统和方法的实施例，其实现高质量和高比例的文档压缩。 在实施例中，高精度层处理使得文本增强，纸张颜色去除以及许多其他高级图像分析和处理成为可能。 系统的实施例支持若干操作模式，并且可以调整其诸如层压缩率，图像分割和模块化图像处理等许多参数，以便为不同目的生成最佳压缩文件。

公开(公告)号：US20090060331A1

公开(公告)日：2009-03-05

申请号：US11848907

申请日：2007-08-31

Applicant: Che-Bin Liu ,  Jing Xiao

Inventor： Che-Bin Liu ,  Jing Xiao

IPC: G06K9/34

CPC classification number: G06K9/38 ,  G06K2209/01

Abstract: Disclosed are embodiments of systems and methods for suppressing the background of an image. In embodiments, the number of foreground pixels or background pixels within a neighborhood of an identified background pixel may be compared against an aggressiveness threshold. Responsive to the number of foreground pixels within a neighborhood of an identified background pixel not exceeding an aggressiveness threshold, the color of the identified background pixel may be changed to an average local background color. Alternatively, responsive to the number of background pixels within a neighborhood of an identified background pixel exceeding an aggressiveness threshold, the color of the identified background pixel may be changed to an average local background color. In embodiments, additional processes may be performed on the image including, but not limited to, color adjusting, filtering, image enhancing, compression, format conversion, watermarking, special effects, video editing, etc.

Abstract translation: 公开了用于抑制图像背景的系统和方法的实施例。 在实施例中，可以将识别的背景像素的邻域内的前景像素或背景像素的数量与侵略性阈值进行比较。 响应于不超过攻击性阈值的所识别的背景像素的邻域内的前景像素的数量，所识别的背景像素的颜色可以改变为平均的本地背景颜色。 或者，响应于所识别的背景像素的邻域中的背景像素的数量超过侵略性阈值，所识别的背景像素的颜色可以被改变为平均的本地背景颜色。 在实施例中，可以对图像执行附加处理，包括但不限于颜色调整，滤波，图像增强，压缩，格式转换，水印，特殊效果，视频编辑等。

公开(公告)号：US20090060330A1

公开(公告)日：2009-03-05

申请号：US11848075

申请日：2007-08-30

Applicant: Che-Bin Liu

Inventor： Che-Bin Liu

IPC: G06K9/34 ,  G06K9/36 ,  G06K9/40

CPC classification number: G06K9/342

Abstract: Systems, apparatuses, and methods are described for performing fast segmentation of an image. In embodiments, an image may be segmented by generating a background mask, generating an edge mask, dilating the edge mask, and refining that edge mask by applying refinement operations that remove edge pixels from the edge mask. In embodiments, the refined edge mask may be used to generate a foreground mask.

Abstract translation: 描述了用于执行图像的快速分割的系统，装置和方法。 在实施例中，可以通过生成背景掩模，生成边缘掩码，扩展边缘掩码以及通过应用从边缘掩码去除边缘像素的细化操作来提炼边缘掩码来对图像进行分割。 在实施例中，精细边缘掩模可用于生成前景掩模。