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1. 发明授权

US06330302B1 Method of and device for forming an image of an object from plurality of images 失效
标题翻译：用于从多个图像形成对象的图像的方法和装置
公开(公告)号：US06330302B1
公开(公告)日：2001-12-11
申请号：US09469333
申请日：1999-12-22
申请人： Johannes H. M. Joosten
发明人： Johannes H. M. Joosten
IPC分类号： H05G164
CPC分类号： H04N5/325 , H04N5/235
摘要： A method of and a device for forming an image of an irradiated object in which images are formed with different exposure levels and the differently exposed images are combined so as to form a single image. The device includes a source and an imaging device which is connected to the source in order to form the image, the imaging device being arranged to form images with different exposure levels and being provided with an image processor in which the differently exposed images are combined so as to form the single image. The device produces images of a quality which is comparable to that of images acquired by means of a device having a much larger dynamic range.
摘要翻译：一种用于形成照射物体的图像的方法和装置，其中形成具有不同曝光水平的图像和不同曝光的图像，以形成单个图像。该装置包括源和成像装置，其连接到源以形成图像，成像装置被布置成形成具有不同曝光水平的图像，并且具有图像处理器，其中不同曝光的图像被组合在一起形成单一图像。该设备产生质量的图像，其与通过具有大得多的动态范围的设备获取的图像的质量相当。

2. 发明授权

US06263044B1 X-ray examination apparatus having an object absorption dependent brightness control 失效
标题翻译： X射线检查装置具有对象吸收依赖性亮度控制
公开(公告)号：US06263044B1
公开(公告)日：2001-07-17
申请号：US09455665
申请日：1999-12-07
申请人： Johannes H. M. Joosten
发明人： Johannes H. M. Joosten
IPC分类号： H05G164
CPC分类号： H05G1/36
摘要： An X-ray examination apparatus for generating an X-ray image of an object, wherein X-ray image generator includes a brightness control input, image processor coupled to the X-ray image generator in order to output a brightness control signal to the control input. The X-ray image generator is provided with an X-ray data output, the image processor is provided with an X-ray data input coupled to the X-ray data output, and the image processor is arranged as calculating system for calculating absorption properties of the object and for generating the brightness control signal in dependence on the absorption properties. Intelligent measuring field selection is now possible on the basis of calculating absorption properties of identifiable objects or parts of objects reproduced in the visible image. Image quality is improved because of brightness control based on more intelligently selected measuring fields.
摘要翻译：一种用于产生对象的X射线图像的X射线检查装置，其中X射线图像生成器包括亮度控制输入，耦合到X射线图像发生器的图像处理器，以将亮度控制信号输出到控制输入。 X射线图像发生器具有X射线数据输出，图像处理器具有与X射线数据输出耦合的X射线数据输入，并且图像处理器被布置为用于计算吸收特性的计算系统并且用于根据吸收特性产生亮度控制信号。现在可以在计算可见图像中再现的可识别物体或部分物体的吸收特性的基础上进行智能测量场选择。由于基于更智能选择的测量场的亮度控制，图像质量得到改善。

3. 发明授权

US5461658A X-ray examination apparatus 失效
标题翻译： X光检查仪
公开(公告)号：US5461658A
公开(公告)日：1995-10-24
申请号：US229502
申请日：1994-04-19
申请人： Johannes H. M. Joosten
发明人： Johannes H. M. Joosten
IPC分类号： A61B6/00 , H04N5/32 , H04N7/18 , H05G1/36 , H05G1/64
CPC分类号： H05G1/64 , H05G1/36
摘要： An x-ray examination apparatus is provided with an auxiliary light-detection system for performing brightness control of a visible image produced on the exit screen of the x-ray image intensifier. The auxiliary light-detection system includes a photosensor having a wide dynamic range and a photodetector having a multitude of photosensitive elements so as to provide spatial resolving power. In particular the photodetector is a charge-coupled device (CCD-detector) having an inherently limited dynamic range. Brightness-control, notably avoiding overexposure in certain regions, is carried out by assembling relevant pixel-values of parts of the image into a control signal. The sensitivity of the CCD-sensor is adjusted by employing of the signal of the photosensor and a sensitivity-control device. Therefore, the sensitivity of the light-detection system is made to match the dynamic range of images due to a collection of x-ray exposures. In order to obtain a control signal that is optimized to relevant pans of the visible image and being independent of average brightness over the entire area of an image, the signal produced by the CCD-detector, that is reciprocal to the average brightness, is multiplied by the signal of the photosensor, that is proportional to the average brightness.
摘要翻译： X射线检查装置设置有用于对在X射线图像增强器的出射屏幕上产生的可视图像进行亮度控制的辅助光检测系统。辅助光检测系统包括具有宽动态范围的光传感器和具有多个感光元件的光电检测器，以便提供空间分辨能力。特别地，光电检测器是具有固有有限的动态范围的电荷耦合器件（CCD检测器）。通过将图像的各部分的相关像素值组装成控制信号来执行亮度控制，特别是避免某些区域中的过度曝光。通过采用光电传感器和灵敏度控制装置的信号来调整CCD传感器的灵敏度。因此，由于X射线曝光的收集，使光检测系统的灵敏度与图像的动态范围相匹配。为了获得对可视图像的相关平板进行优化并且与图像的整个区域上的平均亮度无关的控制信号，由CCD检测器产生的与平均亮度相反的信号被乘以通过光电传感器的信号，这与平均亮度成比例。

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