公开(公告)号：US06459447B1

公开(公告)日：2002-10-01

申请号：US09409658

申请日：1999-09-30

申请人： Fujio Okada ,  Mitsuhisa Nakagawa ,  Keiichi Negishi

发明人： Fujio Okada ,  Mitsuhisa Nakagawa ,  Keiichi Negishi

IPC分类号： H04N718

CPC分类号： H04N5/23203 ,  H04N5/18 ,  H04N7/183 ,  H04N2005/2255 ,  Y10S128/908

摘要： With an electronic endoscope, a wide band video signal is output to connected instruments without giving electric shocks to a body even when the connected instruments are not insulated. The video signal V is converted to differential signals V1, V2 by a differential amp 31 and input to buffers 42, 43 via capacitors 32, 33. The clamp signal CP generated by the clamp signal output means 44 is input to the end terminals of the switches SW1, SW2 via the photocoupler 46. The differential signals V1, V2 undergo pulse clamping in the buffers 42, 43 and the DC components are restored. The video signal restoring portion 49 restores the video signal V on the basis of the differential signals V1, V2 having undergone DC restoration and outputs the video signals to the connected instruments.

摘要翻译： 使用电子内窥镜，即使连接的仪器未被绝缘，宽带视频信号也输出到连接的仪器，而不会对电路产生电击。 视频信号V由差分放大器31转换成差分信号V1，V2，并通过电容器32,33输入到缓冲器42,43。由钳位信号输出装置44生成的钳位信号CP被输入到 开关SW1，SW2通过光电耦合器46.差分信号V1，V2在缓冲器42,43中进行脉冲钳位，直流分量被恢复。 视频信号恢复部分49基于已经经过DC恢复的差分信号V1，V2恢复视频信号V，并将视频信号输出到连接的仪器。

公开(公告)号：US07042488B2

公开(公告)日：2006-05-09

申请号：US10255080

申请日：2002-09-26

申请人： Mitsuru Higuchi ,  Keiichi Negishi ,  Daisuke Ayame ,  Kazunori Abe ,  Shinji Takeuchi

发明人： Mitsuru Higuchi ,  Keiichi Negishi ,  Daisuke Ayame ,  Kazunori Abe ,  Shinji Takeuchi

IPC分类号： H04N7/18

CPC分类号： H04N7/183 ,  A61B1/00009 ,  A61B1/045 ,  A61B1/0638

摘要： In an electronic endoscope of the present invention, an edge detection circuit detects a down edge section and an up edge section of both ends of a blood vessel in a width direction based on a G signal output from an RGB color conversion circuit, an R coefficient selector and a B coefficient selector select, for example, a coefficient smaller than 1 for the detected down edge section and select, for example, a coefficient larger than 1 for the up edge section, and a multiplier multiplies an R signal and a B signal by these coefficients. As a result, both ends of the blood vessel are highlighted with a left end part expressed blackish and a right end part expressed reddish, making it possible to clearly display blood vessels in mucous membranes on a monitor. It is also possible to detect phases on a coordinate system where an R-Y signal is set on a vertical axis and a B-Y signal is set on a horizontal axis, compare these phases with reference phase θ1 of blood vessel colors and extract signals of blood vessel colors.

摘要翻译： 在本发明的电子内窥镜中，边缘检测电路基于从RGB颜色转换电路输出的G信号，检测宽度方向上的血管的两端的下降部分和上缘部分，R系数 选择器和B系数选择器例如选择对于检测的下降沿部分小于1的系数，并且例如选择上升沿部分大于1的系数，并且乘法器将R信号和B信号 通过这些系数。 结果，血管的两端突出显示为左端部，表示为黑色，右端部表示为红色，使得可以在监视器上清楚地显示粘膜中的血管。 也可以检测在垂直轴上设置RY信号的坐标系上的相位，并且将BY信号设置在水平轴上，将这些相位与血管的参考相位θ1比较 颜色和提取血管颜色的信号。

公开(公告)号：US06618502B1

公开(公告)日：2003-09-09

申请号：US09409661

申请日：1999-09-30

申请人： Fujio Okada ,  Mitsuhisa Nakagawa ,  Keiichi Negishi

发明人： Fujio Okada ,  Mitsuhisa Nakagawa ,  Keiichi Negishi

IPC分类号： G06K900

CPC分类号： H04N5/235 ,  H04N5/2355 ,  H04N9/646

摘要： In a first signal suppressing process, in cases where a signal level of a certain color signal among color signals obtained from an image sensing operation is higher than a predetermined signal level, the certain color signal is suppressed. An image sensing operation with a comparatively large exposure quantity and an image sensing operation with a comparatively small exposure quantity are performed alternately. It is detected that suppression of a certain color signal is performed in the first signal suppressing process when the image sensing operation with a comparatively large exposure quantity is performed. A calculation is made to find composition ratios of the color signals, which are obtained from the image sensing operation with a comparatively small exposure quantity. A second signal suppressing process is performed for suppressing at least one color signal other than the certain color signal such that the composition ratios become identical with the calculated composition ratios.

摘要翻译： 在第一信号抑制处理中，在从摄像操作获得的彩色信号中的特定颜色信号的信号电平高于预定信号电平的情况下，抑制该特定颜色信号。 交替地进行具有相对较大曝光量的图像感测操作和具有相对较小曝光量的图像感测操作。 当执行具有相对较大曝光量的图像感测操作时，检测到在第一信号抑制处理中执行某种颜色信号的抑制。 进行计算，以从相对较小的曝光量的图像感测操作中求出彩色信号的组成比。 执行第二信号抑制处理，用于抑制除特定颜色信号之外的至少一种颜色信号，使得组成比与计算出的组成比相同。

公开(公告)号：US06956602B2

公开(公告)日：2005-10-18

申请号：US10255079

申请日：2002-09-26

申请人： Mitsuru Higuchi ,  Daisuke Ayame ,  Kazunori Abe ,  Shinji Takeuchi ,  Keiichi Negishi

发明人： Mitsuru Higuchi ,  Daisuke Ayame ,  Kazunori Abe ,  Shinji Takeuchi ,  Keiichi Negishi

IPC分类号： A61B1/04 ,  A61B1/045 ,  H04N7/18

CPC分类号： H04N7/183 ,  A61B1/00009 ,  A61B1/045 ,  A61B1/0638

摘要： The apparatus according to the present invention includes a level adjusting circuit that increases a gain of a G (or B) signal output from a color conversion circuit, a binarization circuit that forms a binarized image from this G signal and an edge detection circuit that extracts blood vessel position signals through edge detection based on this binarized signal. Then, the apparatus extracts RGB color signals making up a blood vessel image by using the above-described blood vessel position signals, increases the gains of these blood vessel color signals and then adds the blood vessel color signals to the color signals of an original image. This allows blood vessels to be displayed in high contrast to mucous membranes, etc. Furthermore, the apparatus can also amplify the R signal and B signal by using a signal obtained by differentiating the above-described G signal as a gain signal to highlight blood vessels.

摘要翻译： 根据本发明的装置包括电平调节电路，其增加从颜色转换电路输出的G（或B）信号的增益，从该G信号形成二值化图像的二值化电路和提取 基于这种二值化信号的血管位置信号通过边缘检测。 然后，通过使用上述血管位置信号，提取构成血管图像的RGB色信号，增加这些血管颜色信号的增益，然后将血管颜色信号与原始图像的颜色信号相加 。 这允许血管与粘膜等高度显示。此外，该装置还可以通过使用通过将上述G信号作为增益信号进行微分而获得的信号来放大R信号和B信号，以突出血管 。