公开(公告)号：US08421879B2

公开(公告)日：2013-04-16

申请号：US13234236

申请日：2011-09-16

申请人： Takeshi Ito ,  Haruo Yamashita ,  Daisuke Sato

发明人： Takeshi Ito ,  Haruo Yamashita ,  Daisuke Sato

IPC分类号： H04N9/73

CPC分类号： H04N9/735

摘要： A natural white balance is achieved in images that are captured while emitting a flash. The white balance of an image is adjusted using a WB adjustment portion and a mixture ratio calculation portion estimating a mixture ratio of an external light component and a flashed light component that are present in an image captured with emitting a flash, from the image obtained that is captured while emitting a flash and an image signal that is obtained without emitting a flash. Further, an external light WB coefficient determination portion determines an WB coefficient for the external light, a flashed light WB coefficient setting portion sets a WB coefficient for the flashed light, and a WB processing portion that continuously performs WB processing on the image captured while emitting a flash by using the mixture ratio as an interpolation ratio.

摘要翻译： 在发射闪光灯时捕获的图像中实现了自然的白平衡。 使用WB调整部分和混合比计算部分来估计图像的白平衡，该混合比计算部分从获得的图像中估计出现在发出闪光的图像中存在的外部光分量和闪烁的光分量的混合比率 在发出闪光的同时被捕获，并且在不发出闪光的情况下获得图像信号。 此外，外部光WB系数确定部分确定外部光的WB系数，闪光灯WB系数设置部分设置闪光灯的WB系数，以及对发射时捕获的图像连续执行WB处理的WB处理部分 通过使用混合比作为内插比例进行闪光。

公开(公告)号：US20110242366A1

公开(公告)日：2011-10-06

申请号：US13160881

申请日：2011-06-15

申请人： Haruo YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

发明人： Haruo YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

IPC分类号： H04N5/238 ,  H04N9/68

CPC分类号： G03B7/091 ,  G06K9/00228 ,  H04N5/23219 ,  H04N5/2351 ,  H04N5/238 ,  H04N5/243 ,  H04N2101/00

摘要： An imaging apparatus for capturing a moving image performs backlight correction of an image and outputs a natural image. The imaging apparatus electronically captures an image of a subject. An optical system has a light amount adjustment function. An imaging unit reads an optical image of the subject that is formed by the optical system. An A/D converter subjects an output of the imaging unit to A/D conversion. A backlight correction unit converts the tones of an image read by the A/D converter using a conversion characteristic selected differently according to a spatial position and at least increases the luminance level of a dark region of the image. An instruction unit instructs to start backlight correction. A control unit operates the backlight correction unit based on an instruction signal output from the instruction unit, and decreases an exposure light amount of the optical system by a predetermined amount.

摘要翻译： 用于捕获运动图像的成像装置执行图像的背光校正并输出自然图像。 成像设备以电子方式捕获被摄体的图像。 光学系统具有光量调节功能。 成像单元读取由光学系统形成的被摄体的光学图像。 A / D转换器对成像单元的输出进行A / D转换。 背光校正单元使用根据空间位置不同地选择的转换特性来转换由A / D转换器读取的图像的色调，并且至少增加图像的暗区域的亮度水平。 指令单元指示开始背光校正。 控制单元基于从指示单元输出的指示信号来操作背光校正单元，并且将光学系统的曝光光量减少预定量。

公开(公告)号：US20090040335A1

公开(公告)日：2009-02-12

申请号：US12186805

申请日：2008-08-06

申请人： Takeshi Ito ,  Haruo Yamashita ,  Daisuke Sato

发明人： Takeshi Ito ,  Haruo Yamashita ,  Daisuke Sato

IPC分类号： H04N9/73

CPC分类号： H04N9/735

摘要： A natural white balance is achieved in images that are captured while emitting a flash. A WB adjustment portion is provided with a mixture ratio calculation portion that estimates a mixture ratio of an external light component and a flashed light component that are present in an image that is captured with emitting a flash, from the image obtained that is captured while emitting a flash and an image signal that is obtained without emitting a flash, an external light WB coefficient determination portion that determines an WB coefficient for the external light, a flashed light WB coefficient setting portion that sets a WB coefficient for the flashed light, and a WB processing portion that continuously performs WB processing on the image captured while emitting a flash by using the mixture ratio as an interpolation ratio.

摘要翻译： 在发射闪光灯时捕获的图像中实现了自然的白平衡。 WB调整部分设置有混合比计算部分，其估计从发射闪光捕获的图像中存在的外部光分量和闪光分量的混合比率，从发射时捕获的图像获得的图像 在不发出闪光的情况下获得的闪光和图像信号，确定外部光的WB系数的外部光WB系数判定部，设定闪光的WB系数的闪光灯WB系数设定部，以及 WB处理部，通过使用混合比作为内插比，对发出闪光的拍摄图像连续进行WB处理。

公开(公告)号：US08786764B2

公开(公告)日：2014-07-22

申请号：US13160881

申请日：2011-06-15

申请人： Haruo Yamashita ,  Takeshi Ito ,  Daisuke Sato

发明人： Haruo Yamashita ,  Takeshi Ito ,  Daisuke Sato

IPC分类号： H04N5/238 ,  H04N5/20 ,  H04N5/243 ,  G03B7/091 ,  H04N5/235 ,  H04N5/232 ,  G06K9/00 ,  H04N101/00

CPC分类号： G03B7/091 ,  G06K9/00228 ,  H04N5/23219 ,  H04N5/2351 ,  H04N5/238 ,  H04N5/243 ,  H04N2101/00

摘要： An imaging apparatus for capturing a moving image performs backlight correction of an image and outputs a natural image. The imaging apparatus electronically captures an image of a subject. An optical system has a light amount adjustment function. An imaging unit reads an optical image of the subject that is formed by the optical system. An A/D converter subjects an output of the imaging unit to A/D conversion. A backlight correction unit converts the tones of an image read by the A/D converter using a conversion characteristic selected differently according to a spatial position and at least increases the luminance level of a dark region of the image. An instruction unit instructs to start backlight correction. A control unit operates the backlight correction unit based on an instruction signal output from the instruction unit, and decreases an exposure light amount of the optical system by a predetermined amount.

摘要翻译： 用于捕获运动图像的成像装置执行图像的背光校正并输出自然图像。 成像设备以电子方式捕获被摄体的图像。 光学系统具有光量调节功能。 成像单元读取由光学系统形成的被摄体的光学图像。 A / D转换器对成像单元的输出进行A / D转换。 背光校正单元使用根据空间位置不同地选择的转换特性来转换由A / D转换器读取的图像的色调，并且至少增加图像的暗区域的亮度水平。 指令单元指示开始背光校正。 控制单元基于从指示单元输出的指示信号来操作背光校正单元，并且将光学系统的曝光光量减少预定量。

公开(公告)号：US20110310271A1

公开(公告)日：2011-12-22

申请号：US13222313

申请日：2011-08-31

申请人： HARUO YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

发明人： HARUO YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

IPC分类号： H04N5/235

CPC分类号： H04N5/2355 ,  H04N5/2351 ,  H04N5/2352

摘要： An imaging apparatus captures a large dynamic range image of a scene including a backlit person with a blue sky background in a manner that the person's face has an appropriate luminance level without saturating the background sky. An imaging unit obtains analogue image signals through exposure control that prevents a highlight from being saturated, an A/D converter converts the analogue image signals to digital image signals, and a signal processing unit linearly increases the dynamic range of the digital image signals. The image signals with the increased dynamic range are nonlinearly compressed to have a dynamic range of 100% or less through nonlinear dynamic range compression that intensively compresses a highlight portion. The imaging apparatus with this structure first increases the dynamic range of an image and efficiently compresses the increased large dynamic range of the image.

摘要翻译： 成像装置以不使饱和背景天空的方式使人的脸部具有适当的亮度水平的方式捕获包括具有蓝天背景的背光人物的场景的大动态范围图像。 成像单元通过曝光控制获得模拟图像信号，防止亮点饱和​​，A / D转换器将模拟图像信号转换为数字图像信号，信号处理单元线性地增加数字图像信号的动态范围。 具有增加的动态范围的图像信号被非线性压缩以通过集中压缩高亮部分的非线性动态范围压缩而具有100％或更小的动态范围。 具有这种结构的成像装置首先增加图像的动态范围，并有效地压缩图像的增大的大动态范围。

公开(公告)号：US20090295937A1

公开(公告)日：2009-12-03

申请号：US12475958

申请日：2009-06-01

申请人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

发明人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

IPC分类号： H04N5/228 ,  G06K9/36

CPC分类号： H04N5/235 ,  H04N5/20

摘要： A dynamic range (D-range) compression apparatus that uses a look-up table (LUT) is capable of dynamic compression that compresses the peak input value to the full output range, even when image signals with variable D-ranges are inputted.According to this D-range compression apparatus, D-range compression processing that places the D-range of the image signal within a predetermined output D-range is performed by the visual processing unit converting the tone of the image signal in accordance with the surrounding average luminance signal. Furthermore, with this D-range compression apparatus, the image signal is amplified in accordance with amplification input/output conversion characteristics determined based on the peak value in the image detected by the peak detection unit, and therefore it is possible to perform a dynamic amplification processing in accordance with the peak value so that the D-range of the image signal outputted from the visual processing unit becomes a predetermined output D-range.

摘要翻译： 使用查找表（LUT）的动态范围（D范围）压缩装置能够进行动态压缩，即使当输入具有可变D范围的图像信号时，也可以将峰值输入值压缩到全部输出范围。 根据该D档压缩装置，将图像信号的D范围设定在预定的输出D范围内的D范围压缩处理由视觉处理部根据周围的图像信号的色调 平均亮度信号。 此外，利用该D范围压缩装置，根据由峰值检测单元检测到的图像中的峰值确定的放大输入/输出转换特性来放大图像信号，因此可以执行动态放大 根据峰值进行处理，使得从可视处理单元输出的图像信号的D范围变为预定的输出D范围。

公开(公告)号：US20080259181A1

公开(公告)日：2008-10-23

申请号：US12104115

申请日：2008-04-16

申请人： Haruo YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

发明人： Haruo YAMASHITA ,  Takeshi Ito ,  Daisuke Sato

IPC分类号： H04N5/235

CPC分类号： H04N5/2355 ,  H04N5/2351 ,  H04N5/2352

摘要： An imaging apparatus appropriately captures a large dynamic range image of even a scene including a backlit person with a blue sky background in a manner that the person's face has an appropriate luminance level without saturating the background sky. In the imaging apparatus, an imaging unit obtains analogue image signals through exposure control that prevents a highlight from being saturated, an A/D converter converts the analogue image signals to digital image signals, and a signal processing unit linearly increases the dynamic range of the digital image signals. The image signals with the increased dynamic range are nonlinearly compressed to have a dynamic range of 100% or less through nonlinear dynamic range compression that intensively compresses a highlight portion. The imaging apparatus with this structure first increases the dynamic range of an image and efficiently compresses the increased large dynamic range of the image.

摘要翻译： 成像装置适当地捕获包括具有蓝色天空背景的背光人物的场景的大动态范围图像，使得人的脸部具有适当的亮度级而不使背景天空饱和。 在成像装置中，成像单元通过曝光控制获得模拟图像信号，防止突出显示被饱和，A / D转换器将模拟图像信号转换为数字图像信号，并且信号处理单元线性增加动态范围 数字图像信号。 具有增加的动态范围的图像信号被非线性压缩以通过集中压缩高亮部分的非线性动态范围压缩而具有100％或更小的动态范围。 具有这种结构的成像装置首先增加图像的动态范围，并有效地压缩图像的增大的大动态范围。

公开(公告)号：US08144214B2

公开(公告)日：2012-03-27

申请号：US12104115

申请日：2008-04-16

申请人： Haruo Yamashita ,  Takeshi Ito ,  Daisuke Sato

发明人： Haruo Yamashita ,  Takeshi Ito ,  Daisuke Sato

IPC分类号： H04N5/235

CPC分类号： H04N5/2355 ,  H04N5/2351 ,  H04N5/2352

摘要： An imaging apparatus captures a large dynamic range image of a scene including a backlit person with a blue sky background in a manner that the person's face has an appropriate luminance level without saturating the background sky. An imaging unit obtains analogue image signals through exposure control that prevents a highlight from being saturated, an A/D converter converts the analogue image signals to digital image signals, and a signal processing unit linearly increases the dynamic range of the digital image signals. The image signals with the increased dynamic range are nonlinearly compressed to have a dynamic range of 100% or less through nonlinear dynamic range compression that intensively compresses a highlight portion. The imaging apparatus with this structure first increases the dynamic range of an image and efficiently compresses the increased large dynamic range of the image.

摘要翻译： 成像装置以不使饱和背景天空的方式使人的脸部具有适当的亮度水平的方式捕获包括具有蓝天背景的背光人物的场景的大动态范围图像。 成像单元通过曝光控制获得模拟图像信号，防止亮点饱和​​，A / D转换器将模拟图像信号转换为数字图像信号，信号处理单元线性地增加数字图像信号的动态范围。 具有增加的动态范围的图像信号被非线性压缩以通过集中压缩高亮部分的非线性动态范围压缩而具有100％或更小的动态范围。 具有这种结构的成像装置首先增加图像的动态范围，并有效地压缩图像的增大的大动态范围。

公开(公告)号：US20090033753A1

公开(公告)日：2009-02-05

申请号：US12177644

申请日：2008-07-22

申请人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

发明人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

IPC分类号： H04N5/225 ,  G03B15/03 ,  H04N5/262 ,  H04N5/222

CPC分类号： G03B15/03 ,  G01S17/89 ,  G06T5/50 ,  G06T7/586 ,  G06T2207/10152 ,  H04N5/262

摘要： An imaging apparatus estimates a distance based on a reflectance value of a subject estimated with improved precision. An illumination unit illuminates a subject with illumination light. An imaging unit captures a plurality of images each under a different condition of the illumination unit. An illumination light element obtaining unit obtains an image formed with an element of the illumination light from the plurality of images. A reflectance estimation unit eliminates illumination variations from one of the plurality of images or from the image formed with the illumination light element, and estimates a reflectance of the subject corresponding to each pixel. A distance information estimation unit estimates a distance to the subject corresponding to each pixel based on the image formed with the illumination light element and the reflectance of the subject.

摘要翻译： 成像装置基于以提高的精度估计的被摄体的反射率值来估计距离。 照明单元用照明灯照亮被摄体。 成像单元在照明单元的不同条件下捕获多个图像。 照明光元件获取单元从多个图像获得由照明光的元素形成的图像。 反射率估计单元消除从多个图像之一或与照明光元件形成的图像的照明变化，并且估计与每个像素对应的被摄体的反射率。 距离信息估计单元基于与照明光元件形成的图像和被摄体的反射率，估计与每个像素对应的被摄体的距离。

公开(公告)号：US08169500B2

公开(公告)日：2012-05-01

申请号：US12475958

申请日：2009-06-01

申请人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

发明人： Daisuke Sato ,  Haruo Yamashita ,  Takeshi Ito

IPC分类号： H04N5/228 ,  H04N5/235 ,  G06K9/36

CPC分类号： H04N5/235 ,  H04N5/20

摘要： A dynamic range (D-range) compression apparatus that uses a look-up table (LUT) is capable of dynamic compression that compresses the peak input value to the full output range, even when image signals with variable D-ranges are inputted. According to this D-range compression apparatus, D-range compression processing that places the D-range of the image signal within a predetermined output D-range is performed by the visual processing unit converting the tone of the image signal in accordance with the surrounding average luminance signal. Furthermore, with this D-range compression apparatus, the image signal is amplified in accordance with amplification input/output conversion characteristics determined based on the peak value in the image detected by the peak detection unit, and therefore it is possible to perform a dynamic amplification processing in accordance with the peak value so that the D-range of the image signal outputted from the visual processing unit becomes a predetermined output D-range.

摘要翻译： 使用查找表（LUT）的动态范围（D范围）压缩装置能够进行动态压缩，即使当输入具有可变D范围的图像信号时，也可以将峰值输入值压缩到全部输出范围。 根据该D档压缩装置，将图像信号的D范围设定在预定的输出D范围内的D范围压缩处理由视觉处理部根据周围的图像信号的色调 平均亮度信号。 此外，利用该D档压缩装置，根据由峰值检测单元检测到的图像中的峰值确定的放大输入/输出转换特性来放大图像信号，因此可以执行动态放大 根据峰值进行处理，使得从可视处理单元输出的图像信号的D范围变为预定的输出D范围。