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1. 发明申请

US20090046180A1 Fixed-Pattern Noise Elimination Apparatus, Solid-State Image Sensing Apparatus, Electronic Appliance, and Fixed-Pattern Noise Elimination Program 审中-公开
标题翻译：固定图案噪声消除装置，固态图像感测装置，电子设备和固定模式噪声消除程序
公开(公告)号：US20090046180A1
公开(公告)日：2009-02-19
申请号：US12223670
申请日：2006-12-07
申请人： Toshinobu Shibano , Kazuo Hashiguchi
发明人： Toshinobu Shibano , Kazuo Hashiguchi
IPC分类号： H04N9/64
CPC分类号： H04N5/361
摘要： A fixed-pattern noise elimination apparatus 4 eliminates a fixed-pattern noise component resulting from dark current out of an image signal outputted from an effective pixel of a solid-state image sensor 2 during image sensing, by using: a first dark current that is calculated based on a previously acquired signal outputted from a light-shielded pixel of the solid-state image sensor 2 and that is stored in a compensation data memory 6; a second dark current that is calculated based on a previously acquired signal outputted from the effective pixel of the solid-state image sensor 2 with no incident light and that is stored in the compensation data memory 6; and a third dark current that is calculated based on a signal outputted from the light-shielded pixel of the solid-state image sensor 2 during image sensing. With this configuration, a fixed-pattern noise component resulting from dark current can be effectively eliminated irrespective of the temperature of the solid-state image sensor.
摘要翻译：固定图案噪声消除装置4通过使用以下方式消除由图像感测期间从固态图像传感器2的有效像素输出的图像信号中由暗电流产生的固定图案噪声分量：第一暗电流基于从固态图像传感器2的遮光像素输出并存储在补偿数据存储器6中的先前获取的信号计算; 基于从固态图像传感器2的有效像素输出的没有入射光并存储在补偿数据存储器6中的先前获取的信号计算的第二暗电流; 以及基于在图像感测期间从固态图像传感器2的遮光像素输出的信号计算的第三暗电流。利用这种配置，无论固态图像传感器的温度如何，都可以有效地消除由暗电流产生的固定图案噪声分量。

2. 发明授权

US5960033A Matched filter 失效
标题翻译：匹配过滤器
公开(公告)号：US5960033A
公开(公告)日：1999-09-28
申请号：US825864
申请日：1997-04-02
申请人： Toshinobu Shibano , Kunihiko Iizuka
发明人： Toshinobu Shibano , Kunihiko Iizuka
IPC分类号： H03H17/02 , H04B1/7093 , H04J13/00 , H04K1/00
CPC分类号： H03H17/0254 , H04B1/7093 , H04B2201/70703
摘要： A sample-hold circuit, which is constituted by a capacitor and a differential amplifier or a capacitor and an inversion amplifier, is provided with a first switch for short-circuiting the input and output, a second switch for switching the input-side terminal of the input capacitor to a reference voltage input, a third switch for switching the output-side terminal of the feedback capacitor to the reference voltage input, and a fourth switch for switching the input-side terminal of the input capacitor to an input voltage; thus a refreshing operation is available. Consequently, it is possible to compensate for deviations in offset voltage that are inherently caused by process deviations of MOS amplifiers, and to improve the precision of the output of the matched filter. Moreover, in addition to sample-hold circuits having conventional number of steps, a plurality of sample-hold circuits are added, and steps of shift registers, which have binary correlation filter coefficients stored therein, are also added as many as the same number of the added sample-hold circuits. Thus, during the refreshing operation, the extra circuits are used to carry out the process. With this arrangement, it becomes possible to provide a matched filter that is capable of refreshing the sample-hold circuits without adversely affecting the correlation output.
摘要翻译：由电容器和差分放大器或电容器和反相放大器构成的采样保持电路设置有用于使输入和输出短路的第一开关，用于切换输入和输出的输入侧端子的第二开关所述输入电容器与参考电压输入端相连;第三开关，用于将所述反馈电容器的输出侧端子切换到所述基准电压输入;以及第四开关，用于将所述输入电容器的输入侧端子切换为输入电压; 因此可以进行清爽的操作。因此，可以补偿由MOS放大器的工艺偏差固有地引起的偏移电压的偏差，并且提高匹配滤波器的输出的精度。此外，除了具有常规步数的采样保持电路之外，添加多个采样保持电路，并且还添加了存储有二进制相关滤波器系数的移位寄存器的步骤，其数量相同添加的采样保持电路。因此，在刷新操作期间，使用额外的电路来执行该处理。利用这种布置，可以提供能够刷新采样保持电路而不会不利地影响相关输出的匹配滤波器。

3. 发明申请

US20060164524A1 Brightness level converting apparatus, brightness level converting method, solid-state image pickup apparatus, brightness level converting program, and recording medium 审中-公开
标题翻译：亮度电平转换装置，亮度电平转换方法，固态图像拾取装置，亮度电平转换程序和记录介质
公开(公告)号：US20060164524A1
公开(公告)日：2006-07-27
申请号：US11339111
申请日：2006-01-24
申请人： Toshinobu Shibano , Kazuo Hashiguchi
发明人： Toshinobu Shibano , Kazuo Hashiguchi
IPC分类号： H04N9/68
CPC分类号： H04N5/20 , G06T5/009 , G06T5/40 , G06T2207/20021 , H04N5/202 , H04N5/243
摘要： A brightness level converting apparatus improves a contrast of an image represented by an image pickup signal output from a logarithmic conversion solid-state image pickup device, so as to obtain a natural image. For this purpose, the brightness level converting apparatus converts brightness levels in the image pickup signal output from the solid-state image pickup device which logarithmically converts an incident light quantity. In the brightness level converting apparatus, a brightness level converting section converts the brightness levels in the image pickup signal by using a brightness level converting function expressed by an S-shaped curve which indicates the relation between an input brightness level and an output brightness level and includes one inflexion point. Therefore, the contrast in a low brightness level range in the image pickup signal is reduced. At the same time, the contrast in a high brightness level range is reduced while appropriately keeping a gradation. With this, the contrast in an intermediate brightness level range in the image pickup signal is improved considerably. Therefore, the image represented by the image pickup signal whose brightness levels are converted becomes a further natural image.
摘要翻译：亮度级转换装置改善由对数转换固态图像拾取装置输出的图像拾取信号所表示的图像的对比度，以获得自然图像。为此，亮度级转换装置将从入射光量对数转换的固体摄像装置输出的摄像信号中的亮度等级进行转换。在亮度级转换装置中，亮度电平转换部分通过使用表示输入亮度电平和输出亮度电平之间的关系的S形曲线表示的亮度电平转换功能来转换摄像信号中的亮度电平，以及包括一个拐点。因此，降低摄像信号中的低亮度等级范围的对比度。同时，在适当地保持灰度的同时降低了高亮度级别范围内的对比度。由此，显着提高了摄像信号中的中间亮度等级范围的对比度。因此，由其亮度等级被转换的摄像信号表示的图像成为另一自然图像。

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