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    Endoscopic apparatus
    5.
    发明授权
    Endoscopic apparatus 失效
    内窥镜装置

    公开(公告)号：US06456317B1

    公开(公告)日：2002-09-24

    申请号：US09198850

    申请日：1998-11-24

    申请人： Kanichi Matsumoto ,  Katsuyuki Saito ,  Makoto Tsunakawa ,  Akihiko Mochida ,  Kotaro Ogasawara ,  Shinji Yamashita ,  Noboru Kusamura ,  Wataru Ohno ,  Kuniaki Kami ,  Hideki Tashiro

    发明人： Kanichi Matsumoto ,  Katsuyuki Saito ,  Makoto Tsunakawa ,  Akihiko Mochida ,  Kotaro Ogasawara ,  Shinji Yamashita ,  Noboru Kusamura ,  Wataru Ohno ,  Kuniaki Kami ,  Hideki Tashiro

    IPC分类号： H04N318

    CPC分类号： H04N5/2354 ,  H04N5/2352 ,  H04N9/045 ,  H04N2005/2255

    摘要： In an endoscopic apparatus, when the dynamic range expansion on/off switch is turned on, a CPU changes a switch from one contact over to another. Red, green, and blue digital signals sent from a knee and gamma circuit are output to respective dynamic range expanding circuits. Thus, the dynamic ranges for the digital signals are expanded. On the other hand, when the CPU changes another switch from one contact over to the other, a light adjustment signal output from an operational amplifier is then driven to a level causing a diaphragm in a light source unit to open further. Consequently, an increased amount of illumination light is supplied to the incident end of a light guide running through an endoscope. Thus, when a dynamic range is expanded, a halation effect will not occur in imaging of an object located at a point near the distal end of the endoscope. Moreover, insufficiency of illumination light will not occur in the imaging of an object located at a point far from the endoscope distal end. The dynamic range can therefore be expanded efficiently. An endoscopic image of the interior of a body cavity can be viewed with the body cavity set to a desired brightness level all points ranging from a near point to a far point within the body cavity.

    摘要翻译： 在内窥镜装置中，当动态范围扩大开/关开关打开时，CPU将开关从一个触点切换到另一个触点。 从膝盖和伽马电路发送的红色，绿色和蓝色数字信号被输出到相应的动态范围扩展电路。 因此，扩展了数字信号的动态范围。 另一方面，当CPU将另一个开关从一个触点切换到另一个触点时，从运算放大器输出的调光信号被驱动到导致光源单元中的隔膜进一步打开的水平。 因此，向穿过内窥镜的导光体的入射端供给增加量的照明光。 因此，当动态范围扩大时，在位于内窥镜远端附近的物体的成像中不会发生晕影效果。 此外，在位于远离内窥镜远端的点的物体的成像中不会发生照明光的不足。 因此可以有效地扩展动态范围。 体腔内部的内窥镜图像可以被观察到，其体腔被设置为期望的亮度级别，其范围从体腔内的近点到远点。

    Imaging apparatus offering dynamic range that is expandable by weighting two image signals produced during different exposure times with two coefficients whose sum is 1 and adding them up
    6.
    发明授权
    Imaging apparatus offering dynamic range that is expandable by weighting two image signals produced during different exposure times with two coefficients whose sum is 1 and adding them up 失效
    成像设备提供动态范围，通过对两个系数的加和在不同曝光时间内产生的两个图像信号进行扩展，其总和为1并将其相加

    公开(公告)号：US06677992B1

    公开(公告)日：2004-01-13

    申请号：US09176966

    申请日：1998-10-22

    申请人： Kanichi Matsumoto ,  Katsuyuki Saito ,  Kotaro Ogasawara ,  Kuniaki Kami ,  Shinji Yamashita ,  Noboru Kusamura ,  Akihiko Mochida ,  Wataru Ohno ,  Makoto Tsunakawa ,  Hideki Tashiro ,  Manabu Yajima

    发明人： Kanichi Matsumoto ,  Katsuyuki Saito ,  Kotaro Ogasawara ,  Kuniaki Kami ,  Shinji Yamashita ,  Noboru Kusamura ,  Akihiko Mochida ,  Wataru Ohno ,  Makoto Tsunakawa ,  Hideki Tashiro ,  Manabu Yajima

    IPC分类号： H04N5235

    CPC分类号： H04N5/343 ,  H04N5/2258 ,  H04N5/2354 ,  H04N5/35581 ,  H04N5/372 ,  H04N2005/2255

    摘要： An object is imaged continuously during a first exposure time and a second exposure time shorter than the first exposure time. Weights, one of which decreases monotonously and the other of which increases monotonously, are applied to first and second resultant image signals under the condition that the sum of the weights is 1. The first and second image signals that have been weighted are added up, thus producing a synthetic picture signal. When a luminance level is low, the ratio of the first image signal, which has been produced during the longer exposure time, to the second image signal is increased. This results in an image demonstrating a high signal-to-noise ratio. When the luminance level is high, the ratio of the second image signal, which has been produced during the shorter exposure time, to the first image signal is increased. This results in a synthetic image that proves a wide dynamic range, depicts a smoothly varying brightness level, and exhibits a characteristic of being seen as almost natural. Moreover, the first and second image signals are produced to resemble those produced during mutually different exposure times by controlling an amount of light incident on an imaging device or by varying an amount of illumination light.

    摘要翻译： 物体在第一曝光时间和比第一曝光时间短的第二曝光时间连续成像。 在权重之和为1的条件下，其中一个单调减小，另一个单调增加，被加到第一和第二合成图像信号上。加权的第一和第二图像信号相加， 从而产生合成图像信号。 当亮度水平低时，在较长曝光时间内产生的第一图像信号与第二图像信号的比率增加。 这导致显示出高的信噪比的图像。 当亮度水平高时，在较短的曝光时间内产生的第二图像信号与第一图像信号的比率增加。 这导致合成图像证明了宽的动态范围，描绘了平滑变化的亮度水平，并且表现出被视为几乎自然的特征。 此外，通过控制入射到成像装置上的光量或通过改变照明光量，第一和第二图像信号被产生为类似于在相互不同的曝光时间期间产生的图像信号。

    Endoscopic imaging system and endoscope system
    9.
    发明授权
    Endoscopic imaging system and endoscope system 失效
    内窥镜成像系统和内窥镜系统

    公开(公告)号：US07355625B1

    公开(公告)日：2008-04-08

    申请号：US09523332

    申请日：2000-03-10

    申请人： Akihiko Mochida ,  Katsuyuki Saito ,  Hideki Tashiro ,  Kotaro Ogasawara ,  Makoto Tsunakawa ,  Noboru Kusamura

    发明人： Akihiko Mochida ,  Katsuyuki Saito ,  Hideki Tashiro ,  Kotaro Ogasawara ,  Makoto Tsunakawa ,  Noboru Kusamura

    IPC分类号： H04N7/18

    CPC分类号： H04N7/183 ,  A61B1/042 ,  H04N5/232 ,  H04N2005/2255

    摘要： An imaging apparatus having an imaging device for imaging an object in cooperation with an endoscope is connected to a video processing unit for producing a standard video signal so that it can be disconnected freely. A signal delay occurs over a signal line linking the imaging device and the video processing unit. For this reason, a timing generator and a phase adjustment circuit are incorporated in the imaging apparatus. The timing generator generates driving signals used to drive the imaging device, and the phase adjustment circuit adjusts the phases of the driving signals so that an output signal of the imaging device will be input to the video processing unit according to predetermined timing. Even when the signal line has a different length from any other or the imaging device offers a different number of pixels from any other, the difference can be readily coped with owing to the imaging apparatus. This leads to alleviation of a load incurred by the video processing unit.

    摘要翻译： 具有用于与内窥镜协作的物体成像的成像装置的成像装置连接到用于产生标准视频信号的视频处理单元，使得其可以自由地断开。 在连接成像设备和视频处理单元的信号线上发生信号延迟。 因此，定时发生器和相位调整电路并入成像装置。 定时发生器产生用于驱动成像装置的驱动信号，并且相位调整电路调节驱动信号的相位，使得成像装置的输出信号将根据预定定时输入到视频处理单元。 即使当信号线与任何其它信号线具有不同的长度或成像装置提供与任何其他像素不同数量的像素时，由于成像装置也可以容易地应对差异。 这导致减轻由视频处理单元产生的负担。

    Image pickup system
    10.
    发明授权
    Image pickup system 有权
    摄像系统

    公开(公告)号：US07821529B2

    公开(公告)日：2010-10-26

    申请号：US10670114

    申请日：2003-09-24

    申请人： Akihiko Mochida ,  Katsuyuki Saito ,  Makoto Tsunakawa ,  Noboru Kusamura ,  Kotaro Ogasawara ,  Hideki Tashiro

    发明人： Akihiko Mochida ,  Katsuyuki Saito ,  Makoto Tsunakawa ,  Noboru Kusamura ,  Kotaro Ogasawara ,  Hideki Tashiro

    IPC分类号： A62B1/04

    CPC分类号： H04N5/335 ,  A61B1/05 ,  H04N2005/2255

    摘要： To provide an image pickup system having CCDs 25 driven at different frequencies respectively which can drive each CCD 25 with a predetermined frequency if a detachable camera head (or electronic endoscope) 28 is used and also can process a signal processing clock of a video processing circuit 29 with one type of clock. A drive signal of the predetermined frequency supplied to the CCD is produced via a generating circuit CXO 155 in the video processing circuit 29, a frequency dividing circuit 132 and a timing generator (T.G.) 131. A CCD signal outputted from the CCD 25 is inputted to a line memory 139 in a floating circuit 135. As a writing clock (WCK) of the line memory 139, the one which is divided in the frequency dividing circuit 132 to a frequency in accordance with the CCD 25 to be used is used, and as a reading clock (RCK), the one of one type of frequency is used without regard to the CCD 25 to be used. Hence, it is possible to perform the signal processing of a secondary circuit 136 of the line memory 139 and following ones always with a common generating clock.

    摘要翻译： 为了提供具有以不同频率驱动的CCD25的图像拾取系统，其可以使用可拆卸的相机头（或电子内窥镜）28来以预定频率驱动每个CCD 25，并且还可以处理视频处理电路的信号处理时钟 29与一种类型的时钟。 通过视频处理电路29，分频电路132和定时发生器（TG）131中的发生电路CX0 155产生提供给CCD的预定频率的驱动信号。输入从CCD 25输出的CCD信号 作为浮置电路135中的行存储器139.作为行存储器139的写入时钟（WCK），使用在分频电路132中划分为与要使用的CCD 25相对应的频率的存储器， 并且作为读取时钟（RCK），使用一种类型的频率中的一种，而不考虑要使用的CCD 25。 因此，可以对行存储器139的次级电路136进行信号处理，并且可以执行以下公式的公共生成时钟。