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1. 发明授权

US06784939B1 Apparatus and method for automatically controlling exposure time using a mean value of green pixels 失效
标题翻译：使用绿色像素的平均值自动控制曝光时间的装置和方法
公开(公告)号：US06784939B1
公开(公告)日：2004-08-31
申请号：US09428534
申请日：1999-10-28
申请人： Suk-Joong Lee , Gyu-Tae Hwang
发明人： Suk-Joong Lee , Gyu-Tae Hwang
IPC分类号： H04N5238
CPC分类号： H04N5/2351 , H04N5/2353 , H04N9/045
摘要： A method for automatically controlling an exposure time in image sensor having a pixel array includes the steps of producing total pixel value of the green pixels from the pixel array, producing a mean value of the green pixels dividing the total pixel value of the green pixels by the number of the green pixels, producing a deviation value, wherein the deviation value is an absolute value of a difference between the mean value and a predetermined reference value, comparing the deviation value with a predetermined boundary value, in case where the deviation value is smaller than the predetermined boundary value, capturing a next image according to a current exposure time, and in case where the deviation value is larger than the predetermined boundary value, calculating an exposure control rate and determining whether an automatic exposure control mode is enabled, and in case where the automatic exposure control mode is disabled, capturing the next image according to the current exposure time, and in case where the automatic exposure control mode is enabled, capturing the next image according a next exposure time, wherein the next exposure time is calculated multiplying the current exposure time by the exposure control rate.
摘要翻译：一种用于在具有像素阵列的图像传感器中自动控制曝光时间的方法包括以下步骤：从像素阵列产生绿色像素的总像素值，产生将绿色像素的总像素值除以绿色像素的平均值，将绿色像素的平均值除以绿色像素的总像素值绿色像素的数量，产生偏差值，其中偏差值是平均值和预定参考值之间的差的绝对值，将偏差值与预定边界值进行比较，在偏差值为小于预定边界值，根据当前曝光时间拍摄下一图像，并且在偏差值大于预定边界值的情况下，计算曝光控制率并确定是否启用自动曝光控制模式，以及在禁用自动曝光控制模式的情况下，根据当前曝光拍摄下一图像时间，并且在启用自动曝光控制模式的情况下，根据下一曝光时间拍摄下一图像，其中计算下一曝光时间，将当前曝光时间乘以曝光控制率。

2. 发明授权

US06937279B1 Apparatus for converting analog image data into digital image data in CMOS image sensor 失效
标题翻译：用于在CMOS图像传感器中将模拟图像数据转换成数字图像数据的装置
公开(公告)号：US06937279B1
公开(公告)日：2005-08-30
申请号：US09469317
申请日：1999-12-22
申请人： Hyun-Eun Kim , Suk-Joong Lee , Gyu-Tae Hwang , Oh-Bong Kwon
发明人： Hyun-Eun Kim , Suk-Joong Lee , Gyu-Tae Hwang , Oh-Bong Kwon
IPC分类号： H04N1/028 , H03B1/00 , H03M1/12 , H03M1/18 , H03M1/56 , H04N5/335 , H04N5/365 , H04N5/369 , H04N5/374 , H04N5/378 , H04N9/04 , H04N9/07 , H04N3/14
CPC分类号： H04N9/045 , H04N5/378
摘要： Disclosed is an apparatus for converting an analog image data into a digital image data in a CMOS image sensor including a pixel array having M (row line)×N (column line) color pixels, wherein the color pixels include a first color pixel for sensing a first color, a second color pixel for sensing a second color and a third pixel for sensing a third color. The apparatus includes an analog reference voltage generating unit for generating different analog reference voltages according to the analog image data of the color pixels, wherein the different analog reference voltage has different value and different decline rate, a selecting unit, in response to a select control signal, for selecting one of the corresponding analog reference voltages according to the color pixels, and a comparing unit for comparing the analog reference voltage and the analog image data to generate the digital image data corresponding to the color pixels, whereby a conversion operation of the analog image data into the digital image data is differently carried out according to the color characteristic.
摘要翻译：公开了一种用于将模拟图像数据转换为包括具有M（行线）×N（列线））彩色像素的像素阵列的CMOS图像传感器中的数字图像数据的装置，其中，彩色像素包括用于感测第一颜色，用于感测第二颜色的第二颜色像素和用于感测第三颜色的第三像素。该装置包括：模拟参考电压产生单元，用于根据彩色像素的模拟图像数据生成不同的模拟参考电压，其中不同的模拟参考电压具有不同的值和不同的下降率;响应于选择控制，选择单元信号，用于根据颜色像素选择对应的模拟参考电压之一;以及比较单元，用于比较模拟参考电压和模拟图像数据，以生成与彩色像素对应的数字图像数据，由此，根据颜色特性不同地进行模拟图像数据到数字图像数据中。

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