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    • 2. 发明授权
    • Noise-constrained tone curve generation
    • 噪声限制色调曲线生成
    • US09113089B2
    • 2015-08-18
    • US13490311
    • 2012-06-06
    • Xuemei ZhangSteven D. HordleyGraham Finlayson
    • Xuemei ZhangSteven D. HordleyGraham Finlayson
    • G06K9/48H04N5/235
    • H04N5/2355
    • Methods to generate, and devices to use, an adaptive tone curve generation operation are disclosed. Tone curves so generated have been found to produce stable tone mapping in a wide range of operational environments, including during multi-exposure fused images (e.g., during high dynamic range image fusion). In general, techniques are disclosed that use a content-load histogram in combination with image capture device noise information to adaptively bound a tone curve's slope and, therefore, the resulting tone curve. As used here, a content-load histogram is a histogram that captures spatial, color or other information carried by an image's pixels at various gray levels.
    • 公开了生成自适应色调曲线生成操作的方法和使用装置。 已经发现如此生成的色调曲线在广泛的操作环境中产生稳定的色调映射,包括在多曝光融合图像期间(例如,在高动态范围图像融合期间)。 通常,公开了使用内容负载直方图与图像捕获设备噪声信息相结合以自适应地限制色调曲线的斜率并因此使得所得到的色调曲线的技术。 如这里使用的,内容负载直方图是捕获由各种灰度级别的图像像素承载的空间,颜色或其他信息的直方图。
    • 4. 发明授权
    • Determining a layout of graphic objects according to a layout density map
    • 根据布局密度图确定图形对象的布局
    • US09024965B2
    • 2015-05-05
    • US13501269
    • 2009-10-28
    • Xuemei ZhangDaniel R. Tretter
    • Xuemei ZhangDaniel R. Tretter
    • G09G5/02G06T11/60G06F3/12
    • G06T11/60G06F3/125
    • A method performed by a physical computing system for determining a layout of graphic objects (802) according to a layout density map (300) includes generating the layout density map (300), the layout density map (300) having low density regions (302) and high density regions (304); providing a set of candidate locations (402) within the layout density map (302), a number of the candidate locations (402) being equal to a number of the graphic objects (802), the candidate locations (402) being arranged away from the low density regions (302) and from other the candidate locations (402); and overlaying the layout density map (300) with the graphic objects (402), each graphic object (802) being disposed at one of the candidate locations (402).
    • 一种由物理计算系统执行的用于根据布局密度图(300)确定图形对象(802)的布局的方法包括生成布局密度图(300),布局密度图(300)具有低密度区域(302) )和高密度区域(304); 在所述布局密度图(302)内提供一组候选位置(402),所述候选位置(402)的数量等于所述图形对象(802)的数量,所述候选位置(402)远离 所述低密度区域(302)和来自所述候选位置(402)的其他候选位置。 并且将所述布局密度图(300)与所述图形对象(402)重叠,每个图形对象(802)被布置在所述候选位置之一(402)中。
    • 5. 发明授权
    • System and method for determining image placement on a canvas
    • 用于确定画布上图像放置的系统和方法
    • US08682108B2
    • 2014-03-25
    • US13094097
    • 2011-04-26
    • Aibo TianXuemei Zhang
    • Aibo TianXuemei Zhang
    • G06K9/32
    • G06K9/3233
    • A system and a method are disclosed that determine placement of a background image on a canvas and area for placement of foreground images. A system and method include receiving data indicative of an informative zone of a background image and computing an estimated foreground area on a canvas for each candidate placement of the background image on the canvas. The estimated foreground area is computed based on the data indicative of the informative zone and the number of images to be used as foreground images and does not include the informative zone. One of the candidate placements is determined as a selected background placement based on the computed values of estimated foreground area. A composite image can be generated from the background image positioned on the canvas according to the selected background placement and foreground images positioned outside of the informative zone.
    • 公开了一种系统和方法,其确定背景图像在画布上的位置和用于放置前景图像的区域。 系统和方法包括接收指示背景图像的信息区域的数据,并且在画布上计算画布上的背景图像的每个候选放置的估计前景区域。 基于指示信息区域的数据和要用作前景图像的图像数量来计算估计的前景区域,并且不包括信息区域。 基于估计的前景区域的计算值,将候选位置之一确定为所选择的背景位置。 根据所选择的背景位置和位于信息区域之外的前景图像,可以从位于画布上的背景图像生成合成图像。
    • 7. 发明申请
    • Multi-Illuminant Color Matrix Representation and Interpolation Based on Estimated White Points
    • 基于估计白点的多光源颜色矩阵表示和插值
    • US20130093915A1
    • 2013-04-18
    • US13342879
    • 2012-01-03
    • Xuemei ZhangYingjun BaiPaul Hubel
    • Xuemei ZhangYingjun BaiPaul Hubel
    • H04N9/73G06K9/00
    • H04N1/608H04N9/045H04N9/735
    • This disclosure pertains to devices, methods, and computer readable media for improved accuracy of color correction matrix (CCM) coefficient determination based on estimated white point, while maintaining a relatively smooth variation of CCM coefficients over the white point space. The techniques disclosed herein may be achieved via the storage of a limited number of determined CCM multiplier vectors and thus be effective in the camera image pipelines of real image capture devices. With the more accurate CCMs calculated with the disclosed techniques, visible improvement in rendered colors may be achieved as compared to using interpolation from a handful of corner CCMs. The color correction techniques described herein may be implemented by dedicated or general purpose hardware, general application software, or a combination of software and hardware in a computer system.
    • 本公开涉及用于基于估计的白点提高颜色校正矩阵(CCM)系数确定的精度的装置,方法和计算机可读介质,同时保持CCM系数在白点空间上的相对平滑的变化。 本文公开的技术可以通过存储有限数量的确定的CCM乘数向量来实现,并且因此在真实图像捕获设备的相机图像管线中是有效的。 利用所公开的技术计算出的更准确的CCM,与使用少数拐角CCM的插值相比,可以实现渲染颜色的可见改善。 本文描述的颜色校正技术可以由计算机系统中的专用或通用硬件,通用应用软件或软件和硬件的组合来实现。
    • 8. 发明授权
    • Method for dynamically scaling an original background layout
    • 动态缩放原始背景布局的方法
    • US08386957B2
    • 2013-02-26
    • US12392516
    • 2009-02-25
    • Hui ChaoXuemei Zhang
    • Hui ChaoXuemei Zhang
    • G06F3/048
    • G09G5/14G09G2340/0407G09G2340/0464
    • In a method for dynamically scaling an original background layout having at least one element, an instruction to employ the original background layout in a new page that differs in at least one of size and aspect ratio from at least one of the size and aspect ratio of the original background layout is received. In addition, a type and a position of the at least one element is identified and one or more constraints are applied on at least one characteristic of the at least one element to modify the at least one characteristic of the at least one element for inclusion in the new page, in which the one or more constraints are based upon the type and position of the at least one element.
    • 在用于动态地缩放具有至少一个元素的原始背景布局的方法中,在新页面中使用原始背景布局的指令,其在尺寸和宽高比中的至少一个与尺寸和纵横比中的至少一个不同, 收到原始背景布局。 另外,识别至少一个元件的类型和位置,并且对至少一个元件的至少一个特征施加一个或多个约束以修改至少一个元件的至少一个特性以包括在 所述新页面,其中所述一个或多个约束基于所述至少一个元素的类型和位置。
    • 9. 发明申请
    • MULTI-RESOLUTION IMAGE EDITING
    • 多分辨率图像编辑
    • US20110097011A1
    • 2011-04-28
    • US12606822
    • 2009-10-27
    • Suk Hwan LimXuemei Zhang
    • Suk Hwan LimXuemei Zhang
    • G06K9/40G06K9/32
    • G06T11/60
    • Visual elements of a first image are changed in accordance with an image editing process to produce an edited high-resolution image and visual elements of a second image are modified in accordance with an emulator process to produce a modified low-resolution image. The emulator process produces the modified low-resolution image with visual changes relative to the second image that mimic perceived visual changes made to the visual elements of the first image by the image editing process to produce the edited high-resolution image. The emulator process is built from a set of one or more image enhancement processes in accordance with an optimization process.
    • 根据图像编辑处理改变第一图像的视觉元素以产生编辑的高分辨率图像,并且根据仿真器处理修改第二图像的视觉元素以产生修改的低分辨率图像。 仿真器过程产生经修改的低分辨率图像,其具有相对于第二图像的视觉变化,其通过图像编辑处理模拟对第一图像的视觉元素的感知视觉变化,以产生编辑的高分辨率图像。 根据优化过程,仿真器过程由一组一个或多个图像增强过程构建。