公开(公告)号：US20060098892A1

公开(公告)日：2006-05-11

申请号：US10522027

申请日：2003-07-23

申请人： Shuji Sugeno ,  Shigeyuki Ikeda ,  Tadashi Nakamura

发明人： Shuji Sugeno ,  Shigeyuki Ikeda ,  Tadashi Nakamura

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T5/50 ,  G06T2207/20016 ,  G06T2207/30004 ,  H04N5/208

摘要： An edge preservation type of recursive filter 12 outputs an unsharpened image (i.e., low-frequency components) which is smoothed while preserving an edge of an input image in at least one direction (e.g., a vertical direction of the image). The low-frequency components are compressed into a suitable amount by a LUT 14 provided as low-frequency component compression amount setting means and then output. An arithmetic unit 18 provided as low-frequency component compression means compresses the low-frequency components of the input image by subtracting from the input image the output value from the LUT 14. The edge-preservation-type recursive filter 12 can extract the low-frequency components of the input image with an input time delay corresponding to one line of the input image. Therefore, DRC processing has only a short delay due to image processing and is capable of real-time processing by a small amount of computation. In this way, contrast at a medium-to-fine detail of the image such as a catheter can be improved while preventing occurrence of an artifact such as a black region in the processed image.

摘要翻译： 边缘保存型递归滤波器12输出在至少一个方向（例如，图像的垂直方向）保持输入图像的边缘的同时被平滑化的未锐化的图像（即，低频分量）。 通过作为低频分量压缩量设定装置提供的LUT 14将低频分量压缩成合适的量，然后输出。 设置为低频分量压缩装置的算术单元18通过从输入图像中减去来自LUT 14的输出值来压缩输入图像的低频分量。边缘保留型递归滤波器12可以提取低通滤波器12的低频分量。 具有与输入图像的一行对应的输入时间延迟的输入图像的频率分量。 因此，DRC处理由于图像处理而仅具有短的延迟，并且能够通过少量的计算实时处理。 以这种方式，可以改善诸如导管的图像的中等到细节的对比度，同时防止在经处理的图像中出现诸如黑色区域的伪影。

公开(公告)号：US07593588B2

公开(公告)日：2009-09-22

申请号：US10522027

申请日：2003-07-23

申请人： Shuji Sugeno ,  Shigeyuki Ikeda ,  Tadashi Nakamura

发明人： Shuji Sugeno ,  Shigeyuki Ikeda ,  Tadashi Nakamura

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T5/50 ,  G06T2207/20016 ,  G06T2207/30004 ,  H04N5/208

摘要： An edge preservation type of recursive filter 12 outputs an unsharpened image (i.e., low-frequency components) which is smoothed while preserving an edge of an input image in at least one direction (e.g., a vertical direction of the image). The low-frequency components are compressed into a suitable amount by a LUT 14 provided as low-frequency component compression amount setting means and then output. An arithmetic unit 18 provided as low-frequency component compression means compresses the low-frequency components of the input image by subtracting from the input image the output value from the LUT 14. The edge-preservation-type recursive filter 12 can extract the low-frequency components of the input image with an input time delay corresponding to one line of the input image. Therefore, DRC processing has only a short delay due to image processing and is capable of real-time processing by a small amount of computation. In this way, contrast at a medium-to-fine detail of the image such as a catheter can be improved while preventing occurrence of an artifact such as a black region in the processed image.

摘要翻译： 边缘保存型递归滤波器12输出在至少一个方向（例如，图像的垂直方向）保持输入图像的边缘的同时被平滑化的未锐化的图像（即，低频分量）。 通过作为低频分量压缩量设定装置提供的LUT 14将低频分量压缩成合适的量，然后输出。 设置为低频分量压缩装置的算术单元18通过从输入图像中减去来自LUT 14的输出值来压缩输入图像的低频分量。边缘保留型递归滤波器12可以提取低通滤波器12的低频分量。 具有与输入图像的一行对应的输入时间延迟的输入图像的频率分量。 因此，DRC处理由于图像处理而仅具有短的延迟，并且能够通过少量的计算实时处理。 以这种方式，可以改善诸如导管的图像的中等到细节的对比度，同时防止在经处理的图像中出现诸如黑色区域的伪影。

公开(公告)号：US07295652B2

公开(公告)日：2007-11-13

申请号：US10553874

申请日：2004-04-23

申请人： Shigeyuki Ikeda ,  Shuji Sugeno ,  Tadashi Nakamura

发明人： Shigeyuki Ikeda ,  Shuji Sugeno ,  Tadashi Nakamura

IPC分类号： H05G1/64

CPC分类号： A61B6/00

摘要： An X-ray image diagnostic apparatus including an X-ray source, an X-ray flat panel detector, an image processor, and an image display. The image processor includes a storage for storing plural sets of residual image data, acquired in advance from X-ray images in X-ray image acquisition modes from the X-ray flat panel detector before an actual measurement, in correspondence with the X-ray image acquisition modes, and a residual image corrector for correcting residual image data contained in an X-ray image in the actual measurement from the X-ray flat panel detector, using the residual image data stored in the storage.

摘要翻译： 一种X射线图像诊断装置，包括X射线源，X射线平板检测器，图像处理器和图像显示器。 该图像处理器包括用于存储多个残留图像数据组的存储装置，该多个残留图像数据在实际测量之前从X射线图像获取模式的X射线图像获取，并与X射线 图像获取模式，以及残留图像校正器，用于使用存储在存储器中的残留图像数据来校正来自X射线平板检测器的实际测量中包含在X射线图像中的残留图像数据。

公开(公告)号：US20060227935A1

公开(公告)日：2006-10-12

申请号：US10553874

申请日：2004-04-23

申请人： Shigeyuki Ikeda ,  Shuji Sugeno ,  Tadashi Nakamura

发明人： Shigeyuki Ikeda ,  Shuji Sugeno ,  Tadashi Nakamura

IPC分类号： H05G1/64

CPC分类号： A61B6/00

摘要： An X-ray image diagnostic apparatus including an X-ray source, an X-ray flat panel detector, an image processor, and an image display. The image processor includes a storage for storing plural sets of residual image data, acquired in advance from X-ray images in X-ray image acquisition modes from the X-ray flat panel detector before an actual measurement, in correspondence with the X-ray image acquisition modes, and a residual image corrector for correcting residual image data contained in an X-ray image in the actual measurement from the X-ray flat panel detector, using the residual image data stored in the storage.

摘要翻译： 一种X射线图像诊断装置，包括X射线源，X射线平板检测器，图像处理器和图像显示器。 该图像处理器包括用于存储多个残留图像数据组的存储装置，该多个残留图像数据在实际测量之前从X射线图像获取模式的X射线图像获取，并与X射线 图像获取模式，以及残留图像校正器，用于使用存储在存储器中的残留图像数据来校正来自X射线平板检测器的实际测量中包含在X射线图像中的残留图像数据。