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    • 97. 发明申请
    • METHOD FOR CONTROLLING AUTO-EXPOSURE
    • 控制自动曝光的方法
    • US20100134650A1
    • 2010-06-03
    • US12437784
    • 2009-05-08
    • Gyu Won KIMHak Sun KimWon Tae ChoiKyoung Joong MinJoo Young Ha
    • Gyu Won KIMHak Sun KimWon Tae ChoiKyoung Joong MinJoo Young Ha
    • H04N5/235
    • H04N5/2352H04N5/2351H04N5/2357H04N5/243
    • An auto-exposure control method includes: creating an exposure table and an analog gain table including an exposure time and an analog gain of an image sensor set according to an index, respectively; calculating an average luminance value of an image frame obtained by the image sensor; checking whether or not the average luminance value is within a pre-set range including a prescribed final target value; if the average luminance value is not within the pre-set range, determining a shift step from indexes which have been applied to a current image frame according to the difference between the average luminance value and the final target value in order to determine indexes of the exposure table and the analog gain table to be applied to a next image frame; and repeatedly performing of reading an exposure time and an analog gain corresponding to the indexes shifted by the shift step determined from the indexes applied to the current image frame, from the exposure table and the analog gain table, applying the same to the image sensor, obtaining a next image frame, and calculating an average luminance value.
    • 自动曝光控制方法包括:分别根据索引产生曝光表和包括图像传感器组的曝光时间和模拟增益的曝光表和模拟增益表; 计算由所述图像传感器获得的图像帧的平均亮度值; 检查平均亮度值是否在包括规定的最终目标值的预定范围内; 如果平均亮度值不在预设范围内,则根据平均亮度值和最终目标值之间的差,从已经施加到当前图像帧的索引确定移位步长,以便确定 曝光表和要应用于下一个图像帧的模拟增益表; 并且从曝光表和模拟增益表重复执行读取与从应用于当前图像帧的指标确定的移位步长相对应的索引的曝光时间和模拟增益,将其应用于图像传感器, 获得下一个图像帧,并计算平均亮度值。
    • 99. 发明申请
    • APPARATUS AND METHOD FOR CONTROLLING AUTO EXPOSURE
    • 用于控制自动曝光的装置和方法
    • US20100097492A1
    • 2010-04-22
    • US12467504
    • 2009-05-18
    • Joo Young HaBong Soon KangKyung Rin KimWon Tae ChoiByung Hoon Kim
    • Joo Young HaBong Soon KangKyung Rin KimWon Tae ChoiByung Hoon Kim
    • H04N5/235
    • H04N5/2353
    • There is provided an apparatus and method for controlling auto exposure (AE) that is used in digital imaging devices. The apparatus which controls the luminance of an image being outputted from an image sensor by controlling exposure time and analog gain of the image sensor includes: a luminance operation unit operating and outputting a mean luminance of the image outputted from the image sensor; a shutter index determination unit comparing a predetermined target luminance with the mean luminance of the outputted image and determining a shutter index in different manners according to the magnitude of the difference between the target luminance and the mean luminance of the outputted image; and an exposure time/analog gain determination unit generating exposure time and analog gain corresponding to the shutter index determined in the shutter index determination unit and applying the generated exposure time and analog gain to the image sensor. Therefore, the apparatus may be useful to stably reproduce an image with an adequate luminance even when there is a rapid change in brightness of a subject for photography.
    • 提供了一种用于控制在数字成像装置中使用的自动曝光(AE)的装置和方法。 通过控制图像传感器的曝光时间和模拟增益来控制从图像传感器输出的图像的亮度的装置,包括:亮度操作单元,操作并输出从图像传感器输出的图像的平均亮度; 快门指标确定单元,将预定目标亮度与输出图像的平均亮度进行比较,并根据目标亮度和输出图像的平均亮度之间的差值的大小以不同的方式确定快门指数; 以及曝光时间/模拟增益确定单元,其生成与在快门指定确定单元中确定的快门指标相对应的曝光时间和模拟增益,并将所生成的曝光时间和模拟增益应用于图像传感器。 因此,即使在摄影对象的亮度急剧变化的情况下,该装置也可以用于以足够的亮度稳定再现图像。