公开(公告)号：US5125043A

公开(公告)日：1992-06-23

申请号：US657961

申请日：1991-02-20

申请人： Magnus Karlsson

发明人： Magnus Karlsson

IPC分类号： G06T3/40 ,  G09G5/391 ,  G09G5/395

CPC分类号： G06T3/4007 ,  G09G5/391 ,  G09G5/395

摘要： An image display station provides real time selectively zoomed direct display of a received high resolution image stored in image memory. The memory provides storage of the image input data for making available for pixel processing in each of subsequent clock intervals successive groups of adjacent pixel data values throughout a portion to be displayed of the image. User zoom control, by mouse input, selectively establishes a zoom factor for zooming of the input image. User pan control allows selecting display of desired regions of the zoomed image. User contrast control of the zoomed image is provided also by the mouse. Bilinear pixel processing of the successive groups of adjacent pixel data values is carried out throughout the displayed portion of input data within the time period of a single video display frame in accordance with the zoom factor established by the mouse input for such frame. The processing circuitry utilizes a start position in response to the user pan input for data made available from the image memory to define a displayed region of the zoomed image. The processed groups of data are pipelined and converted to analog form for on-the-fly real time video display with display contrast controlled from contrast data lookup according to the contrast input. Each of successive video frames can have a different such zoom factor and the displayed region of the zoomed image is position-shiftable by the pan input by fractional increments from one video frame to the next.

摘要翻译： 图像显示站提供对存储在图像存储器中的接收的高分辨率图像的实时选择性缩放直接显示。 存储器提供图像输入数据的存储，以便在图像的整个部分中显示的相邻像素数据值的连续组中的每个后续时钟间隔中可用于像素处理。 用户变焦控制，通过鼠标输入，有选择地建立缩放因子，以缩放输入图像。 用户平移控制允许选择放大图像的所需区域的显示。 缩放图像的用户对比度控制也由鼠标提供。 根据由这种帧的鼠标输入建立的缩放因子，在单个视频显示帧的时间周期内，在输入数据的整个显示部分中执行连续的相邻像素数据值组的双线性像素处理。 响应于用户平移输入，处理电路利用从图像存储器获得的数据可以定义缩放图像的显示区域的起始位置。 经处理的数据组被流水线化并转换为模拟形式，用于实时视频显示，显示对比度根据对比度输入从对比度数据查找控制。 每个连续的视频帧可以具有不同的这样的缩放因子，并且缩放图像的显示区域可以通过平移输入进行位移 - 从一个视频帧到下一个视频帧的分数增量。