公开(公告)号：US07384158B2

公开(公告)日：2008-06-10

申请号：US10752955

申请日：2004-01-07

Applicant: Gopal Ramachandran ,  Gregory A. Prior

Inventor： Gopal Ramachandran ,  Gregory A. Prior

IPC: G03B21/28 ,  H04N3/23

CPC classification number: H04N9/3185 ,  G02B17/06 ,  G02B17/0621 ,  G03B21/10 ,  G03B21/28 ,  H04N5/57 ,  H04N5/7408 ,  H04N2005/745 ,  H04N2005/7466

Abstract: An image projection system and method is presented for optically projecting an image onto a display surface with visually correct geometry and optimum image quality. The projection system includes an image processing unit for receiving the input image data and generating distortion-compensated image data to compensate for ensuing spatial distortions in the projection system, a projection light engine for receiving the distortion-compensated image data and projecting a distortion-compensated optical image that corresponds to the distortion-compensated image data; and, an optical reflection assembly comprising at least one curved mirror positioned in the optical path of the distortion-compensated optical image emerging from the projection light engine for producing a displayed optical image with reduced distortion on the display surface. The image processing unit distortion-compensates the input image data such that the optical and spatial distortions associated with the projection light engine and optical reflection assembly are substantially reduced in the displayed optical image.

Abstract translation: 提出了一种图像投影系统和方法，用于将图像光学投影到具有视觉上正确的几何形状和最佳图像质量的显示表面上。 投影系统包括图像处理单元，用于接收输入图像数据并产生失真补偿图像数据以补偿投影系统中的随后的空间失真;投影光引擎，用于接收失真补偿图像数据并投影失真补偿 对应于失真补偿图像数据的光学图像; 以及光学反射组件，其包括位于从投影光引擎出现的失真补偿光学图像的光路中的至少一个弯曲镜，用于在显示表面上产生具有减小的失真的显示光学图像。 图像处理单元失真补偿输入图像数据，使得与所投影光引擎和光学反射组件相关联的光学和空间失真在显示的光学图像中显着减小。

公开(公告)号：US20060050074A1

公开(公告)日：2006-03-09

申请号：US10939045

申请日：2004-09-09

Applicant: Zorawar Bassi

Inventor： Zorawar Bassi

IPC: G06T15/20

CPC classification number: G06T3/0006

Abstract: A system and method for representing a two-dimensional spatial transformation that describes the transformation by an inverse mapped grid data set. The grid data for each coordinate is surface fitted on an array of rectangular patches defined in the output space using numerical techniques. Error analysis determines whether a finer mesh resolution is required for surface fitting. The spatial transformation is then defined by the array of rectangular surface patches and the set of surface coefficients such that the spatial transformation can be executed through evaluation of the surface polynomials. The two-dimensional surface polynomial representation allows the transformation to be easily adjusted for scale changes and zooming and panning effects.

Abstract translation: 用于表示二维空间变换的系统和方法，其描述由逆映射网格数据集的变换。 每个坐标的网格数据使用数字技术，在输出空间中定义的矩形块阵列上进行表面拟合。 错误分析确定表面拟合是否需要更细的网格分辨率。 然后通过矩形表面贴片阵列和表面系数集合来定义空间变换，使得可以通过表面多项式的评估来执行空间变换。 二维表面多项式表示允许对于尺度变化和缩放和平移效果容易地进行变换。

公开(公告)号：US07474799B2

公开(公告)日：2009-01-06

申请号：US10461320

申请日：2003-06-12

Applicant: Zorawar S. Bassi ,  Louie Lee ,  Gopal Ramachandran

Inventor： Zorawar S. Bassi ,  Louie Lee ,  Gopal Ramachandran

IPC: G06K9/40 ,  H04N5/00 ,  H04N1/40 ,  H04N1/38

CPC classification number: G06T3/0018 ,  G06T3/00 ,  G06T5/006

Abstract: An electronic correction system and method for correcting optical anomalies, namely distortions, color non-convergence (excluding axial chromatic aberration) and luminance (or chrominance) non-uniformity. Each effect is modeled as a transformation in either spatial (positional) space or color space. Representing the effects as transformations of digital pixel data, allows the different anomalies to be resolved within a common framework, namely that of image ‘warping’. The anomaly, having been expressed as a pixel transformation, is then eliminated by electronically applying the inverse transformation. This process is equivalent to digitally manipulating or warping the image in position and/or color space and accordingly this can be achieved using commercially known warping circuits. In addition, the transformation can also contain a component to additionally perform any application specific image warping (e.g. scaling and geometric transformations). Finally, by storing a sequence of transformations, adaptive anomaly correction and dynamic effects can be achieved.

Abstract translation: 用于校正光学异常的电子校正系统和方法，即失真，颜色不收敛（不包括轴向色差）和亮度（或色度）不均匀性。 每个效果被建模为空间（位置）空间或颜色空间中的变换。 将影响代表数字像素数据的转换，可以在共同的框架内解决不同的异常，即图像“翘曲”。 已经表示为像素变换的异常然后通过电子应用逆变换来消除。 该过程等同于在位置和/或颜色空间中数字地操纵或扭曲图像，因此可以使用商业上已知的翘曲电路来实现。 此外，转换还可以包含附加地执行任何应用特定图像翘曲（例如缩放和几何变换）的组件。 最后，通过存储一系列变换，可以实现自适应异常校正和动态效果。

公开(公告)号：US20090002835A1

公开(公告)日：2009-01-01

申请号：US11770082

申请日：2007-06-28

Applicant: Gregory A. Prior ,  Gopal RAMACHANDRAN ,  Zorawar S. Bassi

Inventor： Gregory A. Prior ,  Gopal RAMACHANDRAN ,  Zorawar S. Bassi

IPC: G02B27/14 ,  G02B17/00

CPC classification number: G02B27/0012 ,  G02B27/0025

Abstract: A method for optimizing cost and performance in a lens assembly is disclosed. The method relaxes the constraints of optically correcting lateral chromatic aberration and distortion on the lens assembly and instead electronically corrects for lateral chromatic aberration and distortion. As a result the lens assembly transmissivity and MTF improve dramatically and other aberrations are reduced as a result of re-optimizing the lens assembly merit function. The cost and volume of the lens assembly are reduced as well. The optimized lens assembly could be used in rear or front projection display devices as a well as image acquisition devices.

Abstract translation: 公开了一种用于优化透镜组件中的成本和性能的方法。 该方法放松了光学校正透镜组件上的横向色像差和失真的限制，而是电子校正横向色像差和失真。 结果，透镜组件透射率和MTF显着提高，并且由于重新优化透镜组件优点功能而使其它像差减小。 镜头组件的成本和体积也减小了。 优化的透镜组件可用于后投影或前投影显示装置以及图像采集装置。

公开(公告)号：US07379626B2

公开(公告)日：2008-05-27

申请号：US10922328

申请日：2004-08-20

Applicant: Vladimir Lachine ,  Gregory Lionel Smith ,  Louie Lee

Inventor： Vladimir Lachine ,  Gregory Lionel Smith ,  Louie Lee

IPC: G06K9/32

CPC classification number: G06T3/403 ,  G06T5/002 ,  G06T5/20 ,  G06T7/13 ,  G06T2207/20012 ,  G06T2207/20192

Abstract: An edge adaptive system and method for image filtering. The method maps each output pixel onto input image coordinates and then prefilters and resamples the input image pixels around this point to reduce noise and adjust the scale corresponding to a particular operation. Then the edge in the input image is detected based on local and average signal variances in the input pixels. According to the edge detection parameters, including orientation, anisotropy and variance strength, the method determines a footprint and frequency response for the interpolation of the output pixel. In a more particular implementation, the method divides the input pixel space into a finite number of directions called skews, and estimates the edge orientation with the nearest skew direction. This further facilitates pixels inclusion in the interpolation of the output pixel.

Abstract translation: 边缘自适应系统和图像滤波方法。 该方法将每个输出像素映射到输入图像坐标上，然后对该点附近的输入图像像素进行预滤波和重新采样，以减少噪声并调整与特定操作对应的刻度。 然后基于输入像素中的局部和平均信号方差检测输入图像中的边缘。 根据边缘检测参数，包括方位，各向异性和方差强度，该方法确定输出像素插值的覆盖区和频率响应。 在更具体的实现中，该方法将输入像素空间划分为称为偏斜的有限数量的方向，并且以最近的倾斜方向估计边缘方向。 这进一步促进像素包含在输出像素的内插中。

公开(公告)号：US07239360B2

公开(公告)日：2007-07-03

申请号：US10459426

申请日：2003-06-12

Applicant: Zorawar S. Bassi ,  Gregory Lionel Smith ,  Louie Lee

Inventor： Zorawar S. Bassi ,  Gregory Lionel Smith ,  Louie Lee

IPC: H04N9/28

CPC classification number: H04N9/3141 ,  H04N5/7408

Abstract: A short throw projection system and method for displaying a corrected optical image on a projection screen based on input image data that includes an electronic correction unit, an image projector and a reflection assembly. The electronic correction unit receives the input image data and generates pre-distorted image data. The image projector receives the pre-distorted image data from the electronic correction unit and projects a pre-distorted optical image that corresponds to the pre-distorted image data or a pre-distorted image compensated by the projection optic distortion. The optical reflection assembly is positioned in the optical path of the pre-distorted optical image to project an optical image on the projection screen. The reflection assembly can consist of various combinations of curved and planar mirrors as desired. The electronic correction unit is encoded to pre-distort the geometry of the image represented by the image data such that when the pre-distorted optical image is projected through the image projector and reflected within the reflection assembly, the optical and geometric distortions associated with the image projector and the mirrors within the reflection assembly are eliminated in the displayed optical image.

Abstract translation: 一种短投影投影系统和方法，用于基于包括电子校正单元，图像投影仪和反射组件的输入图像数据在投影屏幕上显示校正的光学图像。 电子校正单元接收输入图像数据并产生预失真图像数据。 图像投影仪从电子校正单元接收预失真的图像数据，并投影与预失真图像数据相对应的预失真光学图像或通过投影光学失真补偿的预失真图像。 光学反射组件位于预失真光学图像的光路中，以将投影屏幕上的光学图像投影。 反射组件可以根据需要由弯曲和平面镜的各种组合组成。 对电子校正单元进行编码以对由图像数据表示的图像的几何形状进行预变形，使得当预失真的光学图像通过图像投影仪投影并在反射组件内反射时，与...相关联的光学和几何失真 在所显示的光学图像中消除了图像投影仪和反射组件内的反射镜。

公开(公告)号：US07352913B2

公开(公告)日：2008-04-01

申请号：US10166692

申请日：2002-06-12

Applicant: Bonaventure Karuta ,  Louie Lee

Inventor： Bonaventure Karuta ,  Louie Lee

IPC: G06K9/40

CPC classification number: G06T5/006 ,  G02B27/0025 ,  G03B27/68 ,  G06T3/00 ,  G06T2207/20021 ,  H04N5/74 ,  H04N9/3185 ,  H04N9/3194

Abstract: A system and method for correcting distortion in projected images caused by the projection of an input image by a projector lens onto a projection screen having a surface that is not orthogonal to the projection axis of the projector. Projection parameters including the focal length of the projector lens and the angles that represent the pan, tilt and roll angle of the projector are obtained. Then the projected area and the best viewable rectangular area that fits within said projected area is determined. The distortion is then characterized by using a distortion transformation which corresponds to the transformation that exists between the vertices of the best viewable rectangular area and the corresponding vertices of the projected area. Finally, the distortion transformation is inverted and applied to input image to obtain a distortion free projected image.

Abstract translation: 一种用于校正由投影仪透镜将输入图像投影到具有不与投影仪的投影轴正交的表面的投影屏幕上的投影图像中的失真的系统和方法。 获得投影参数，包括投影镜头的焦距和投影机的平移，倾斜和滚动角度的角度。 然后确定投影区域和适合于所述投影区域内的最佳可视矩形区域。 然后通过使用对应于存在于最佳可视矩形区域的顶点与投影区域的对应顶点之间的变换的失真变换来表征失真。 最后，将失真变换反转并应用于输入图像，以获得无失真的投影图像。

公开(公告)号：US20060050083A1

公开(公告)日：2006-03-09

申请号：US10939044

申请日：2004-09-09

Applicant: Vladimir Lachine ,  Gregory Smith ,  Louie Lee

Inventor： Vladimir Lachine ,  Gregory Smith ,  Louie Lee

IPC: G09G5/00

CPC classification number: G06T5/20 ,  G06T3/0093 ,  G06T5/004

Abstract: A method and system for circularly symmetric anisotropic filtering over an extended elliptical or rectangular footprint in single-pass digital image warping are disclosed. The filtering is performed by first finding and adjusting an ellipse that approximates a non-uniform image scaling function in a mapped position of an output pixel in the input image space. A linear transformation from this ellipse to a unit circle in the output image space is determined to calculate input pixel radii inside the footprint and corresponding filter coefficient as a function of the radius. The shape of the footprint is determined as a trade-off between image quality and processing speed. In one implementation, profiles of smoothing and warping components are combined to produce sharper or detail enhanced output image. The method and system of the invention produce natural output image without jagging artifacts, while maintaining or enhancing the sharpness of the input image.

Abstract translation: 公开了一种用于单通道数字图像翘曲中的扩展椭圆形或矩形覆盖区域上的圆对称各向异性滤波的方法和系统。 通过首先查找和调整在输入图像空间中输出像素的映射位置近似非均匀图像缩放函数的椭圆来执行滤波。 确定从该椭圆到输出图像空间中的单位圆的线性变换，以计算占空比内的输入像素半径和对应的滤波器系数作为半径的函数。 足迹的形状被确定为图像质量和处理速度之间的折衷。 在一个实现中，平滑和翘曲部件的轮廓被组合以产生更清晰或细节增强的输出图像。 本发明的方法和系统在保持或提高输入图像的清晰度的同时产生自然输出图像而不产生锯齿状伪像。

公开(公告)号：US20060015686A1

公开(公告)日：2006-01-19

申请号：US10892559

申请日：2004-07-14

Applicant: Frederick Candler

Inventor： Frederick Candler

IPC: G06F12/00 ,  G09G5/36 ,  G06F12/14

CPC classification number: G06F12/0875 ,  G06T1/60

Abstract: A cache memory method and corresponding system for two-dimensional data processing, and in particular, two-dimensional image processing with simultaneous coordinate transformation is disclosed. The method uses a wide and fast primary cache memory (PCM) and a deep secondary cache memory (SCM), each with multiple banks to access data simultaneously. A dedicated pre-fetching logic is used to obtain pixel data from an external memory upon receiving control parameters from an external processor system (PU1), and to store that data in the PCM based on a secondary control queue. The data are then prepared in specific block sizes and in specific format, and then stored in the PCM based on optimally sized pre-fetching primary control queue. The prepared data are then read by another external processor system (PU2) for processing. The cache control logic ensures the coherency of data and control parameters at the input of the PU2.

Abstract translation: 公开了一种用于二维数据处理的高速缓冲存储器方法和对应系统，特别是具有同时坐标变换的二维图像处理。 该方法使用宽而快的主缓存存储器（PCM）和深次级高速缓冲存储器（SCM），每个存储器具有多个存储体以同时访问数据。 当从外部处理器系统（PU 1）接收到控制参数时，专用预取逻辑用于从外部存储器获得像素数据，并且基于辅助控制队列将该数据存储在PCM中。 然后以特定块大小和特定格式准备数据，然后基于最佳大小的预取主控制队列存储在PCM中。 准备的数据然后由另一个外部处理器系统（PU 2）读取以进行处理。 高速缓存控制逻辑确保PU 2输入端的数据和控制参数的一致性。

公开(公告)号：US06917363B2

公开(公告)日：2005-07-12

申请号：US10166387

申请日：2002-06-11

Applicant: Frederick Christopher Candler ,  Louie Lee

Inventor： Frederick Christopher Candler ,  Louie Lee

IPC: G06T1/60

CPC classification number: G06T1/60

Abstract: An image data processing method and system receives image data from a burst memory buffer and provides output image data to a vertical filter for filtering. The method determines whether a new frame of input image data has been received, said frame of data having a plurality of blocks, each block having a plurality of rows and columns. A vertical input buffer uses a read pointer, an oldest unused data pointer, and a write pointer to keep track of the data that is being read and stored. Data is read and stored into said vertical input buffer by determining the minimum offset for the block, reading a row of input image data from the burst memory buffer and skipping the row depending on the minimum offset until minimum offset reached, and storing the row of input image data in said vertical input buffer for processing by the vertical filter until the buffer is full. If the entire frame has been processed then the pointers are all reset. If an entire column in the output image has been processed then the column data is flushed. In another embodiment, a low latency mode is adopted such that it is not necessary for the columns to be completely processed before switching to the next column horizontally.

Abstract translation: 图像数据处理方法和系统从突发存储器缓冲器接收图像数据，并将输出图像数据提供给用于滤波的垂直滤波器。 该方法确定是否已经接收到输入图像数据的新帧，所述数据帧具有多个块，每个块具有多个行和列。 垂直输入缓冲器使用读指针，最旧的未使用数据指针和写指针来跟踪正在读取和存储的数据。 数据被读取并存储到所述垂直输入缓冲器中，通过确定块的最小偏移量，从突发存储器缓冲器读取一行输入图像数据，并根据最小偏移量跳过该行直到达到最小偏移量，并存储 在所述垂直输入缓冲器中输入图像数据，以由垂直滤波器进行处理，直到缓冲器满。 如果整个帧已被处理，则指针全部被复位。 如果输出图像中的整列已被处理，则列数据被刷新。 在另一个实施例中，采用低等待时间模式，使得在将水平切换到下一列之前不需要对列进行完全处理。