Bi-level digital color printer system exhibiting improved undercolor
removal and error diffusion procedures
    1.
    发明授权
    Bi-level digital color printer system exhibiting improved undercolor removal and error diffusion procedures 失效
    双级数字彩色打印机系统具有改进的底色去除和误差扩散程序

    公开(公告)号:US5402245A

    公开(公告)日:1995-03-28

    申请号:US187567

    申请日:1994-01-27

    CPC分类号: H04N1/52 H04N1/6022

    摘要: A system selectively enables a printer to deposit on a sheet C, M, Y and K color dots at each of the plurality of pixel locations to produce a color image. The system comprises a memory for storing C, M, Y and K color values for each pixel in the color image and a processor for controlling selective deposition of the C, M, Y and K colors. The processor determines a gray value for each pixel location from values stored in the C, M, and Y color planes. The processor subtracts the determined gray value from the C, M, and Y values which correspond to the pixel location and then determines a relationship of the gray value to a non-linear function and in dependence upon the relationship alters the C, M and Y pixel values accordingly. The processor either (1) adds the gray value back to the C, M, and Y values for the pixel location, or (2) adds a first portion of the gray value to the C, M, and Y values for the pixel location and a second portion of the gray value to the K value for the pixel location; or (3) adds all of the gray value to a K value for the pixel location. As a result, the C, M, Y and K values are altered in accordance with the determined gray value. The altered color values are then prioritized and the processor determines which colors should be printed at each pixel location and diffuses color error values to neighboring pixel locations after such determination. The prioritization procedure enables print priority to be given to either the brightest color dot or to the color dot that is most visible to the human eye.

    摘要翻译: 系统选择性地使得打印机能够在多个像素位置中的每个像素位置处沉积在片材C,M,Y和K上的色点,以产生彩色图像。 该系统包括用于存储彩色图像中每个像素的C,M,Y和K颜色值的存储器和用于控制C,M,Y和K颜色的选择性沉积的处理器。 处理器根据存储在C,M和Y色彩平面中的值确定每个像素位置的灰度值。 处理器从对应于像素位置的C,M和Y值中减去确定的灰度值,然后确定灰度值与非线性函数的关系,并且根据关系改变C,M和Y 像素值相应。 处理器(1)将灰度值添加回像素位置的C,M和Y值,或者(2)将灰度值的第一部分添加到像素位置的C,M和Y值 以及所述灰度值的第二部分为所述像素位置的K值; 或者(3)将所有灰度值添加到像素位置的K值。 结果,C,M,Y和K值根据确定的灰度值而改变。 改变的颜色值然后被优先化,并且处理器确定在每个像素位置应该打印哪些颜色,并且在这样的确定之后将颜色误差值扩散到相邻像素位置。 优先顺序使打印优先级能够被赋予最亮的颜色点或人眼最为可见的颜色点。

    Self-aligning neck joint
    2.
    发明授权
    Self-aligning neck joint 失效
    自调心颈关节

    公开(公告)号:US4793236A

    公开(公告)日:1988-12-27

    申请号:US65897

    申请日:1987-06-24

    IPC分类号: G10D3/00 G10D1/08 G10D3/06

    CPC分类号: G10D1/085 G10D3/06

    摘要: A self-aligning neck joint for releasably securing the neck of an electric guitar to the guitar body and maintaining the neck in fixed proper alignment with the body. The neck joint includes a first bracket secured in a channel in the underside of the upper end of the neck and a second bracket secured in a neck pocket in the guitar body such that upon securing the brackets together the neck is secured to and fixed in proper alignment with the guitar body. The brackets each define a pair of rows of interlocking undercut teeth with one of the rows of teeth on the second bracket being moveable in a transverse direction for selective engagement and disengagement with the mating teeth on the first bracket to allow the brackets to be moved out of engagement and the neck separated from the guitar body. A moveable screw driven wedge is provided on the second bracket to urge the moveable teeth thereon outwardly into fixed engagement with the mating teeth on the first bracket and thereby tightly lock the neck to the body of the guitar in proper alignment.

    摘要翻译: 一种自调心颈部接头,用于将电吉他的颈部可释放地固定到吉他身上,并将颈部保持与身体固定的正确对准。 颈部关节包括固定在颈部上端下侧的通道中的第一支架和固定在吉他体颈部口袋中的第二支架,使得在将支架固定在一起时,颈部被固定并固定 与吉他身体对齐。 支架每个限定一对互锁底切齿,第二支架上的一排齿可在横向方向上移动,以便与第一支架上的配合齿选择性地接合和分离,以允许支架移出 与颈部分离吉他身体。 可移动的螺旋驱动的楔形件设置在第二支架上,以将其上的可移动的齿向上推动成与第一支架上的配合齿固定接合,从而将颈部紧密地锁定到吉他的本体以适当的对准。

    Color halftone error-diffusion with local brightness variation reduction
    4.
    发明授权
    Color halftone error-diffusion with local brightness variation reduction 失效
    颜色半色调误差扩散与局部亮度变化减小

    公开(公告)号:US5991438A

    公开(公告)日:1999-11-23

    申请号:US903899

    申请日:1997-07-31

    CPC分类号: H04N1/52

    摘要: Error diffusion algorithms such as the celebrated Floyd Steinberg error-diffusion algorithm are high-performance halftoning methods in which quantization errors are diffused to "future" pixels. Originally intended for grayscale images, they are traditionally extended to color images by error-diffusing each of the three color planes independently (separable error-diffusion). Adding a design rule which is based on certain characteristics of human color perception to the error-diffusion paradigm results in a color halftoning algorithm having output of considerably higher quality when compared to separable error-diffusion. These benefits are achieved by adding the Minimum Brightness Variation Criterion (MBVC) to the design rules of color error-diffusion halftoning methods. Halftone values are constrained to be vertices of a Minimum Brightness Variation Quadruple (MBVQ) associated with each pixel of the color image being processed. The algorithm presented requires no additional memory and entails a reasonable increase in run-time.

    摘要翻译: 诸如着名的弗洛伊德·斯坦伯格误差扩散算法之类的误差扩散算法是将量化误差扩散到“未来”像素的高性能半色调方法。 最初用于灰度图像,它们通常通过错误地扩散三个色平面中的每一个(可分离的误差扩散)来扩展到彩色图像。 将基于人类颜色感知的某些特征的设计规则添加到误差扩散范例导致与可分离的误差扩散相比,具有相当高质量的输出的色彩色调算法。 通过将最小亮度变化标准(MBVC)添加到颜色误差扩散半色调方法的设计规则中来实现这些优点。 半色调值被限制为与正在处理的彩色图像的每个像素相关联的最小亮度变化四倍(MBVQ)的顶点。 所提出的算法不需要额外的内存,并且需要合理的增加运行时间。

    Chain lock for sliding door
    5.
    发明授权
    Chain lock for sliding door 失效
    滑动门链锁

    公开(公告)号:US5015022A

    公开(公告)日:1991-05-14

    申请号:US345129

    申请日:1989-04-28

    IPC分类号: E05B65/08

    摘要: A lock for a sliding panel such as a sliding glass door includes a chain which bends in only one direction. The chain, when latched, forms an incompressible column between the openward edge of the panel and the door frame. Unlatching allows the chain to bend in its allowed direction and fall vertically along side the door frame, thus allowing the panel to open.

    摘要翻译: 用于诸如滑动玻璃门的滑动面板的锁包括仅沿一个方向弯曲的链条。 链条锁定时,在面板的向外边缘和门框之间形成不可压缩的柱。 解锁允许链条沿其允许的方向弯曲并沿着门框架的侧面垂直地下降,从而允许面板打开。

    General purpose image enhancement algorithm which augments the visual perception of detail in digital images
    6.
    发明授权
    General purpose image enhancement algorithm which augments the visual perception of detail in digital images 失效
    通用图像增强算法,增强了数字图像中细​​节的视觉感知

    公开(公告)号:US06792160B2

    公开(公告)日:2004-09-14

    申请号:US09916968

    申请日:2001-07-27

    IPC分类号: G06K938

    摘要: A tone correction system, method and interface is described in which a digital image is initially filtered to obtain a corresponding locally averaged value for each pixel value of the image. The image is optimally filtered using a cone-type filter having a small filter radius and which favorably weights the center pixel values of the radius. Shadow and highlight values are obtained from selected shadow and highlight functions, respectively, using the locally averaged values. A tone function is derived from each of the shadow an highlight values for each pixel. Each pixel value of the image is then remapped according to its derived shadow and highlight tone functions. The tone corrected image can be reinteratively corrected by adjusting parameters of the shadow and highlight functions and remapping the image data until a desired image quality is achieved.

    摘要翻译: 描述了一种色调校正系统,方法和接口,其中最初对数字图像进行滤波以获得图像的每个像素值的相应的局部平均值。 使用具有小滤波器半径的锥形滤波器对图像进行最佳滤波,并有利地对半径的中心像素值进行加权。 使用本地平均值分别从选定的阴影和高亮度功能中获取阴影和突出显示值。 每个阴影的每个像素的高亮度值都派生了一个色调函数。 然后根据其导出的阴影和高亮色调功能重新映射图像的每个像素值。 可以通过调整阴影的参数和突出显示功能并重新映射图像数据直到达到期望的图像质量来再次校正色调校正的图像。

    Pixel error diffusion method
    8.
    发明授权
    Pixel error diffusion method 失效
    像素误差扩散法

    公开(公告)号:US5434672A

    公开(公告)日:1995-07-18

    申请号:US82126

    申请日:1993-06-23

    CPC分类号: H04N1/4052

    摘要: Error distribution in printing and information processing systems is accomplished according to combined internal and external super-pixel error diffusion techniques, effective for distributing whole or fractional error contributions both within and without a selected super-pixel. For a particular super-pixel, error amounts of a selected internal subject pixel are provided to another internal subject pixel until a determined or selected final pixel error value within the selected super-pixel has been determined. This final, internal error value is distributed fractionally or wholly among selected super-pixels within a predetermined super-pixel neighborhood.

    摘要翻译: 打印和信息处理系统中的错误分布是根据组合的内部和外部超像素误差扩散技术来实现的,这有助于在所选择的超像素内部和不区分分布全部或部分误差贡献。 对于特定的超像素,所选择的内部对象像素的误差量被提供给另一内部主题像素,直到所选择的超像素内的确定或选择的最终像素误差值已被确定为止。 该最终的内部误差值在预定的超像素邻域内的选定的超像素中分布地或完全分布。