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    • 2. 发明授权
    • Image signal reproducing apparatus
    • 图像信号再现装置
    • US5561529A
    • 1996-10-01
    • US163005
    • 1993-12-08
    • Yasuyuki TanakaTetsuya ShimizuKatsumi Karasawa
    • Yasuyuki TanakaTetsuya ShimizuKatsumi Karasawa
    • H04N5/7826H04N5/783H04N5/926H04N5/937H04N5/945H04N7/26H04N7/50
    • H04N5/9261H04N19/61H04N5/9264H04N5/937H04N19/107H04N5/78263H04N5/783H04N5/945
    • The present invention provides an image signal reproducing apparatus, in which a writing operation memory structure temporarily storing the image signal is controlled such that control structure prohibits sad memory structure from writing the same portion of the image signal that said memory structure has stored, to prove the image signal reproducing apparatus which is adequate to reproduce image data compressed by the inter-frame encoding, an image signal reproducing apparatus, in which a reading operation of memory structure temporarily storing the image signal is controlled such that control structure changes a unit portion of an image signal repeatedly read out from said memory structure according to a motion of the image signal, to maintain the vertical resolving power for still images and to prevent the motion images to become unnatural, and an image signal reproducing apparatus, in which a writing operation of memory structure temporarily storing the image signal is controlled such that control structure changes a condition to allow the image signal to be written in said memory structure, to reproduce the image signal having as high quality as possible.
    • 本发明提供了一种图像信号再现装置,其中控制临时存储图像信号的写入操作存储器结构,使得控制结构禁止悲伤存储器结构写入存储结构所存储的图像信号的相同部分,以证明 适于再现通过帧间编码压缩的图像数据的图像信号再现装置,图像信号再现装置,其中暂时存储图像信号的存储结构的读取操作被控制,使得控制结构改变单元部分的单位部分 根据图像信号的运动从所述存储器结构重复读出的图像信号,以维持静止图像的垂直分辨率并防止运动图像变得不自然;以及图像信号再现装置,其中写入操作 的存储结构临时存储图像信号被控制 这样,控制结构改变条件以允许图像信号被写入所述存储器结构中,以再现具有尽可能高质量的图像信号。
    • 3. 发明授权
    • Image processing apparatus
    • 图像处理装置
    • US06718122B1
    • 2004-04-06
    • US08321597
    • 1994-10-12
    • Yoshiki IshiiMakoto ShimokoriyamaTetsuya ShimizuKatsumi Karasawa
    • Yoshiki IshiiMakoto ShimokoriyamaTetsuya ShimizuKatsumi Karasawa
    • H04N591
    • H04N9/804H04N9/79
    • An object of the present invention is to provide a digital VTR wherein, without increasing a transmission rate of an image memory and a data bus corrected thereto, a double error correction coding and decoding process can be achieved. In order to achieve the object, an input and output memory 240 for storing an image data according to an input and an output formats, and a recording and reproducing memory 250 for storing the image according to an image format are provided. To the input and output memory 240, via an input and output bus 234, an input and output circuits 232 and 238 is corrected. In data transmission between the input output memory 240 and the recording and reproducing memory 250, a format conversion, and coding and decoding of an external code are performed. To the recording and reproducing memory 250, via recording and reproducing bus 252, inner coding and decoding circuits 254A and 254B are corrected.
    • 本发明的目的是提供一种数字VTR,其中,在不增加图像存储器和校正的数据总线的传输速率的情况下,可以实现双纠错编码和解码处理。 为了实现该目的,提供了用于根据输入和输出格式存储图像数据的输入和输出存储器240以及用于根据图像格式存储图像的记录和再现存储器250。 通过输入和输出总线234向输入和输出存储器240输入和输出电路232和238进行校正。 在输入输出存储器240与记录和再现存储器250之间的数据传输中,执行格式转换以及外部代码的编码和解码。 通过记录和再现总线252向记录和再现存储器250校正内部编码和解码电路254A和254B。
    • 8. 发明申请
    • FOCUS DETECTOR, AND LENS APPARATUS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME
    • 焦点检测器,镜头装置和图像拾取装置,包括它们
    • US20130038779A1
    • 2013-02-14
    • US13568570
    • 2012-08-07
    • Katsumi Karasawa
    • Katsumi Karasawa
    • H04N5/232
    • H04N5/23212G02B7/36G03B13/36
    • A focus detector for detecting a defocus amount of an image pickup optical system based on a displacement amount between two images formed by two beams divided from the image pickup optical system and passed through two pupil areas, the focus detector including: two lenses; two phase difference sensors for photoelectrically converting two subject images formed by the two lenses into two image signals; a correlation computing unit for dividing the two image signals based on a reference number-of-pixels to compute an image displacement amount for each divided area; a waveform coincidence computing unit for computing a coincidence degree of the two image signals in the each divided area in which the image displacement amount is computed by the correlation computing unit; and a defocus computing unit for computing a defocus amount based on the coincidence degree of the two image signals computed by the waveform coincidence computing unit.
    • 一种聚焦检测器,用于基于由从摄像光学系统分割并通过两个瞳孔区域的两束形成的两个图像之间的位移量来检测图像拾取光学系统的散焦量,所述焦点检测器包括:两个透镜; 两个相位差传感器,用于将由两个透镜形成的两个被摄体图像光电转换为两个图像信号; 相关计算单元,用于基于参考像素数来划分两个图像信号,以计算每个分割区域的图像位移量; 波形重合计算单元,用于计算由相关计算单元计算图像位移量的每个划分区域中的两个图像信号的一致度; 以及散焦计算单元,用于基于由所述波形重合计算单元计算的两个图像信号的一致度来计算散焦量。
    • 9. 发明申请
    • LENS APPARATUS
    • 镜头装置
    • US20110267706A1
    • 2011-11-03
    • US13094404
    • 2011-04-26
    • Katsumi Karasawa
    • Katsumi Karasawa
    • G02B7/09G02B15/14
    • G02B7/282H04N5/23212
    • Provided is a lens apparatus including: an image pickup optical system including a focus lens and a zoom lens; a focus detector for detecting a focus state of the image pickup optical system; a defocus amount calculation unit for calculating a defocus amount based on a result of a detection performed by the focus detector; a driving amount calculation unit for calculating a driving amount necessary to drive the focus lens to a focus position based on the defocus amount calculated by the defocus amount calculation unit; and a controller for controlling a driving of the focus lens, in which the controller controls a driving speed of the focus lens depending on the defocus amount calculated by the defocus amount calculation unit and the driving amount calculated by the driving amount calculation unit.
    • 提供一种透镜装置,包括:摄像光学系统,包括聚焦透镜和变焦透镜; 用于检测图像拾取光学系统的聚焦状态的聚焦检测器; 散焦量计算单元,用于基于由所述焦点检测器执行的检测结果来计算散焦量; 驱动量计算单元,用于基于由散焦量计算单元计算的散焦量来计算将聚焦透镜驱动到对焦位置所需的驱动量; 以及控制器,用于控制对焦透镜的驱动,其中控制器根据由散焦量计算单元计算的散焦量和由驱动量计算单元计算出的驱动量来控制聚焦透镜的驱动速度。
    • 10. 发明授权
    • Automatic focusing apparatus
    • 自动对焦装置
    • US08000591B2
    • 2011-08-16
    • US12769191
    • 2010-04-28
    • Katsumi Karasawa
    • Katsumi Karasawa
    • G03B3/10
    • G02B7/282G02B7/34H04N5/23212
    • An automatic focusing apparatus includes: a focus detector photoelectrically converting at least a part of a photographing beam; a defocus computer calculating a defocus amount based on an output of the focus detector; a driver driving a focus lens based on the defocus amount; and a unit setting a maximum time period for charge accumulation in the focus detector. If the accumulated charge in the focus detector reaches a threshold within the period, when the accumulated charge in the focus detector reaches the threshold, the defocus computer calculates a defocus amount using an output of the focus detector and outputs the defocus amount to the driver. If the accumulated charge in the focus detector does not reach the threshold within the period, when the period lapses, the defocus computer calculates a defocus amount using an output of the focus detector and outputs the defocus amount to the driver.
    • 一种自动对焦装置,包括:聚焦检测器,其对光束的至少一部分进行光电转换; 散焦计算机,基于焦点检测器的输出计算散焦量; 基于散焦量驱动聚焦透镜的驱动器; 以及设置焦点检测器中的电荷累积的最大时间段的单位。 如果焦点检测器中的累积电荷达到该期间内的阈值,则当焦点检测器中的累积电荷达到阈值时,散焦计算机使用焦点检测器的输出来计算散焦量,并将散焦量输出给驾驶员。 如果聚焦检测器中的累积电荷在该周期内未达到阈值,则当周期经过时,散焦计算机使用焦点检测器的输出来计算散焦量,并将散焦量输出给驾驶员。