Image rotation in opponent color space
    12.
    发明授权
    Image rotation in opponent color space 有权
    图像旋转在对手的颜色空间

    公开(公告)号:US06621940B2

    公开(公告)日:2003-09-16

    申请号:US09329297

    申请日:1999-06-10

    IPC分类号: G06K932

    CPC分类号: G06T3/606

    摘要: An image is rotated in opponent color space, such as L*a*b* or Y CB CR color space, by inputting the opponent color space image data, subsampling the opponent color space image data, and addressing the subsampled opponent color space image data into an output configuration corresponding to a specified rotation angle. For 90° and 270° rotation, the opponent color space image data is scaled before being addressed. This eliminates distortion of the rotated image, while allowing real-time rotation of the image in hardware.

    摘要翻译: 通过输入对方的彩色空间图像数据,对对方的彩色空间图像数据进行二次采样,以及寻址二次采样的对象色彩空间图像数据,使图像在对方的颜色空间(例如L * a * b *或Y CB CR颜色空间)中旋转 变成对应于指定的旋转角度的输出配置。 对于90°和270°旋转,对方的颜色空间图像数据在被寻址之前被缩放。 这消除了旋转图像的失真,同时允许图像在硬件中实时旋转。

    Loopback direct memory access control system for a digital scanner
    13.
    发明授权
    Loopback direct memory access control system for a digital scanner 有权
    用于数字扫描仪的环回直接存储器访问控制系统

    公开(公告)号:US06401143B1

    公开(公告)日:2002-06-04

    申请号:US09452688

    申请日:1999-12-02

    IPC分类号: G06F1328

    CPC分类号: G06F13/28

    摘要: The present invention generally relates to a loopback direct memory access control system for a digital scanner for processing images. More specifically, the present invention is directed to a method and apparatus for quickly reading digital data from memory, processing the digital data and writing the processed digital data to memory.

    摘要翻译: 本发明一般涉及一种用于数字扫描仪处理图像的环回直接存储器访问控制系统。 更具体地说,本发明涉及一种用于从存储器快速读取数字数据,处理数字数据并将经处理的数字数据写入存储器的方法和装置。