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    • 6. 发明授权
    • Multi-projector display system calibration
    • 多投影机显示系统校准
    • US08262229B2
    • 2012-09-11
    • US12728838
    • 2010-03-22
    • Steve Nelson
    • Steve Nelson
    • G03B21/14G06K9/48
    • H04N17/00H04N9/3147H04N9/3182H04N9/3185H04N9/3194
    • A first Gray code technique and a second raster calibration technique can be combined to create a precise mapping between pixel locations of the camera and pixel locations of the projector(s). In one aspect the technique of using the raster calibration images is eliminated by interpolating the projector coordinate information decoded from the Gray code images. In another aspect camera images are processed to reduce errors caused by noise so that text can be displayed without any noticeable misalignment between projectors. In a third aspect, a scale factor is calculated based on the relative height/width of projector regions in the captured calibration images. Calibration images are recalculated using the scale factor to provide greater correspondence between the mapping of a low resolution camera to the high-resolution projectors.
    • 可以组合第一格雷码技术和第二光栅校准技术以在相机的像素位置和投影仪的像素位置之间创建精确的映射。 在一方面,通过内插从格雷码图像解码的投影仪坐标信息来消除使用光栅校准图像的技术。 在另一方面,相机图像被处理以减少由噪声引起的误差,使得文本可以在投影机之间没有任何明显的不对准的情况下显示。 在第三方面,基于所捕获的校准图像中的投影仪区域的相对高度/宽度来计算比例因子。 使用比例因子重新计算校准图像,以便在低分辨率相机与高分辨率投影机的映射之间提供更大的对应关系。
    • 8. 发明申请
    • Correcting Row and Column Shifts in a Calibration Matrix for a Projection System
    • 校正投影系统校正矩阵中的行和列移位
    • US20110234922A1
    • 2011-09-29
    • US12748202
    • 2010-03-26
    • Steve NelsonVictor Ivashin
    • Steve NelsonVictor Ivashin
    • H04N3/26
    • H04N9/3194H04N9/3147H04N9/3185
    • A method for correcting a projection from a plurality of digital projectors is provided. The method includes receiving as an input a matrix which maps each pixel to be projected to a captured pixel that includes a row value and a column value and detecting a shift with respect row or column values in the matrix. The method further includes determining attributes of the shift, wherein the attributes include a type for the shift and an overlap length for the shift. A gradient length is determined from the overlap length. A gradient of pixel weightings is generated for each gradient length. The pixel weightings are uniformly sloping and are associated with pixels in the gradient length and neighboring pixels. Intersecting gradients re merged and a list that includes common points and diagonal points is created from the merging process. The method operations may be embodied as code on a computer readable storage medium.
    • 提供了一种用于从多个数字投影仪校正投影的方法。 该方法包括:接收作为输入的矩阵,其将要投影的每个像素映射到包括行值和列值的捕获像素,并且检测相对于矩阵中的行或列值的移位。 所述方法还包括确定所述偏移的属性,其中所述属性包括所述偏移的类型和所述偏移的重叠长度。 从重叠长度确定梯度长度。 每个梯度长度产生像素加权的梯度。 像素权重是均匀倾斜的,并且与渐变长度和相邻像素中的像素相关联。 相交渐变被合并,包括共同点和对角点的列表是从合并过程中创建出来的。 方法操作可以体现为计算机可读存储介质上的代码。
    • 9. 发明申请
    • Display Masks for Display and Calibration in Projector-Based Display Systems
    • 在基于投影机的显示系统中显示和校准的显示屏
    • US20110050873A1
    • 2011-03-03
    • US12549044
    • 2009-08-27
    • Steve Nelson
    • Steve Nelson
    • H04N7/18G06K9/46
    • H04N9/3194H04N9/3185
    • Methods having corresponding apparatus and computer-readable media comprise: capturing an image of a shape projected upon a display surface; and determining a first rectangle that is the largest inscribed rectangle for the shape, comprising generating a rectangular bounding box containing the shape, dividing the rectangular bounding box vertically into first and second sections, determining a second rectangle that is the largest inscribed rectangle for the shape in the first section of the bounding box, determining a third rectangle that is the largest inscribed rectangle for the shape in the second section of the bounding box, dividing the rectangular bounding box horizontally into third and fourth sections, determining a fourth rectangle that is the largest inscribed rectangle for the shape in a third section of the bounding box, and determining a fifth rectangle that is the largest inscribed rectangle for the shape in the fourth section of the bounding box.
    • 具有对应装置和计算机可读介质的方法包括:捕获投影在显示表面上的形状的图像; 并且确定作为所述形状的最大内切矩形的第一矩形,包括生成包含所述形状的矩形边界框,将所述矩形边界框垂直分割成第一和第二部分,确定作为形状的最大内切矩形的第二矩形 在边界框的第一部分中,确定作为边界框的第二部分中的形状的最大内切矩形的第三矩形,将矩形边界框水平地分割成第三和第四部分,确定作为 在边界框的第三部分中用于形状的最大内切矩形,并且确定作为边界框的第四部分中的形状的最大内切矩形的第五矩形。
    • 10. 发明申请
    • Intensity Scaling for Multi-Projector Displays
    • 多投影机显示器的强度缩放
    • US20110019108A1
    • 2011-01-27
    • US12506901
    • 2009-07-21
    • Steve NelsonVictor Ivashin
    • Steve NelsonVictor Ivashin
    • H04N3/22
    • H04N9/31H04N9/3147H04N9/3182
    • Methods having corresponding apparatus and computer-readable media comprise: receiving a first digital image representing a first composite projection, wherein each first composite projection comprises a plurality of overlapping component projections, wherein each of the component projections is generated by a respective projector; and generating one or more respective first intensity scaling maps for each of the projectors, comprising, for each of the first intensity scaling maps, identifying a displayed non-overlap projection region for the projector associated with the first intensity scaling map based on the first digital image, and generating a first intensity scaling map for the projector, comprising determining a distance to the nearest pixel within the displayed non-overlap region of the projector for each pixel outside the non-overlap region of the projector, and assigning a first intensity scaling value to each pixel outside the displayed non-overlap region of the projector based on the respective distance.
    • 具有对应装置和计算机可读介质的方法包括:接收表示第一复合投影的第一数字图像,其中每个第一复合投影包括多个重叠分量投影,其中每个分量投影由相应的投影仪产生; 以及为每个投影仪生成一个或多个相应的第一强度缩放图,包括针对每个第一强度缩放图,基于第一数字图像识别与第一强度缩放图相关联的投影仪的显示的非重叠投影区域 图像,以及生成用于投影仪的第一强度缩放图,包括确定与投影仪的非重叠区域之外的每个像素在所显示的投影仪的非重叠区域内的最近像素的距离,以及分配第一强度缩放 基于相应的距离,对于投影仪的显示的非重叠区域之外的每个像素的值。