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    • 93. 发明申请
    • COMPOSING AN IMAGE FROM SUB-IMAGES
    • 从子图像组合图像
    • WO9700573A2
    • 1997-01-03
    • PCT/IB9600504
    • 1996-05-28
    • PHILIPS ELECTRONICS NVPHILIPS NORDEN AB
    • BRUIJNS ANTONIUS JOHANNES CORNLUIJENDIJK JOHANNES ALBERT
    • A61B6/00G06T1/00G06T5/00H04N3/15H04N5/32H04N7/18H05G1/60H05G1/64
    • H04N5/32H04N3/1593H05G1/60
    • An image pick-up apparatus (1) for picking up a plurality of sub-images and combining them so as to form a composite image, comprising a correction unit (5) for correcting brightness values of the composite image. The correction unit (5) comprises a selection unit (6) for selecting bright and dark parts from the sub-images. There is also provided an arithmetic unit (10) for deriving a gain correction factor from the bright parts and an offset correction term from the dark parts. The correction unit (5) also comprises a multiplier unit (8) and an adder unit (9) for multiplying signal levels of a sub-image signal by the gain correction factor and for adding the offset correction term thereto. The image pick-up apparatus is used in an X-ray examination apparatus (20) for picking up an optical image on the exit window (32) of an X-ray image intensifier (24) and for supplying an electronic image signal for a high-resolution composite image so that image information in a medical X-ray image with small details can be suitably reproduced.
    • 一种用于拾取多个子图像并组合它们以形成合成图像的图像拾取装置(1),包括用于校正合成图像的亮度值的校正单元(5)。 校正单元(5)包括用于从子图像中选择明暗部分的选择单元(6)。 还提供了用于从亮部导出增益校正因子的运算单元(10)和来自暗部的偏移校正项。 校正单元(5)还包括乘法器单元(8)和加法器单元(9),用于将子图像信号的信号电平乘以增益校正因子,并将偏移校正项相加。 摄像装置用于X射线检查装置(20),用于拾取X射线图像增强器(24)的出射窗(32)上的光学图像,并且用于提供用于 高分辨率复合图像,从而可以适当地再现具有小细节的医疗X射线图像中的图像信息。