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公开(公告)号：US20160219231A1
公开(公告)日：2016-07-28
申请号：US14606562
申请日：2015-01-27
发明人： Barry VANHOFF
CPC分类号： H04N5/361 , H01L27/14607 , H04N5/2257 , H04N5/365 , H04N9/045 , H04N2209/045
摘要： A method for removing background signal values from readout signal values generated by image pixels in a pixel array may include generating background signal values using optically black pixels formed around a border of the pixel array. The background signal values may be separated into blocks. Block average values may be calculated based on the background signal values included in each of the blocks. Corner regions of the pixel array may be free of image pixels and optically black pixels. Corner background signal values may be extrapolated based on the block average values. Image pixel background signal values may be interpolated based on the block average values and the corner background signal values. The image pixel background signal values may be subtracted from the readout values.
摘要翻译： 从像素阵列中的图像像素产生的读出信号值中去除背景信号值的方法可包括使用形成在像素阵列的边界周围的光学黑色像素产生背景信号值。 背景信号值可以分成块。 可以基于包括在每个块中的背景信号值来计算块平均值。 像素阵列的角区域可以没有图像像素和光学黑色像素。 角度背景信号值可以基于块平均值进行外推。 可以基于块平均值和角落背景信号值来内插图像像素背景信号值。 可以从读出值中减去图像像素背景信号值。
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公开(公告)号：US20240348938A1
公开(公告)日：2024-10-17
申请号：US18607172
申请日：2024-03-15
发明人： Orit SKORKA , Barry VANHOFF , Radu ISPASOIU , Vladimir KOROBOV
IPC分类号： H04N23/75 , H04N23/72 , H04N23/73 , H04N23/741 , H04N25/587
CPC分类号： H04N23/75 , H04N23/72 , H04N23/73 , H04N23/741 , H04N25/587
摘要： Image sensors, imaging systems, and methods for high dynamic range imaging. The image sensor includes image sensor pixels, a light filter, and a controller. The light filter is configured to attenuate transmission of incident light to the image sensor pixels. The controller is configured to set the light filter to a high-transmission state and capture a first image generated by the image sensor pixels during a first exposure. The controller is also configured to set the light filter to a low-transmission state and capture a second image generated by the image sensor pixels during a second exposure. The controller is further configured to combine the first and second images to generate a high dynamic range image. The controller is also configured to adjust an attenuation of the light filter for a next iteration of the low-transmission state based on pixel signals generated during the second exposure.
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