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公开(公告)号：US20150016722A1
公开(公告)日：2015-01-15
申请号：US14380629
申请日：2013-02-21
CPC分类号： G06T5/009 , G06T5/008 , G06T2207/10024 , G06T2207/20012 , H04N1/6027 , H04N5/235 , H04N5/2355 , H04N9/3179 , H04N9/73 , H04N9/77
摘要： A region determination circuit (60) determines whether or not each of the pixels in an image is within a region subject to correction, in which pixels having at most a predetermined brightness level appear with a frequency equal to or less than a predetermined value. An offset level generation circuit (10) generates an offset level (Offset) on the basis of the brightness of the pixels determined to be within the region subject to correction. An offset subtraction circuit (1) subtracts the offset level (Offset) from the image signal (Yi) to generate an offset image signal (Yofst). A gain generation circuit (20) generates a gain for the offset image signal (Yofst). A gain multiplication circuit (2) multiplies the offset image signal (Yofst) by the gain to generate a corrected image signal (Ya).
摘要翻译： 区域确定电路（60）确定图像中的每个像素是否在经过校正的区域内，其中出现具有等于或小于预定值的频率的具有至多预定亮度级的像素。 偏移电平生成电路（10）根据确定为在校正区域内的像素的亮度产生偏移电平（Offset）。 偏移减法电路（1）从图像信号（Yi）中减去偏移电平（Offset），产生偏移图像信号（Yofst）。 增益生成电路（20）产生偏移图像信号（Yofst）的增益。 增益乘法电路（2）将偏移图像信号（Yofst）乘以增益以产生校正图像信号（Ya）。
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2.发明授权Image processing device and method to correct brightness signal of an input image 有权用于校正输入图像的亮度信号的图像处理装置和方法公开(公告)号：US09349168B2
公开(公告)日：2016-05-24
申请号：US14380629
申请日：2013-02-21
CPC分类号： G06T5/009 , G06T5/008 , G06T2207/10024 , G06T2207/20012 , H04N1/6027 , H04N5/235 , H04N5/2355 , H04N9/3179 , H04N9/73 , H04N9/77
摘要： A region determination circuit (60) determines whether or not each of the pixels in an image is within a region subject to correction, in which pixels having at most a predetermined brightness level appear with a frequency equal to or less than a predetermined value. An offset level generation circuit (10) generates an offset level (Offset) on the basis of the brightness of the pixels determined to be within the region subject to correction. An offset subtraction circuit (1) subtracts the offset level (Offset) from the image signal (Yi) to generate an offset image signal (Yofst). A gain generation circuit (20) generates a gain for the offset image signal (Yofst). A gain multiplication circuit (2) multiplies the offset image signal (Yofst) by the gain to generate a corrected image signal (Ya).
摘要翻译： 区域确定电路（60）确定图像中的每个像素是否在经过校正的区域内，其中出现具有等于或小于预定值的频率的具有至多预定亮度级的像素。 偏移电平生成电路（10）根据确定为在校正区域内的像素的亮度产生偏移电平（Offset）。 偏移减法电路（1）从图像信号（Yi）中减去偏移电平（Offset），产生偏移图像信号（Yofst）。 增益生成电路（20）产生偏移图像信号（Yofst）的增益。 增益乘法电路（2）将偏移图像信号（Yofst）乘以增益以产生校正图像信号（Ya）。
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