专利名称：Apparatus and method for high dynamic
range imaging using spatially varyingexposures
发明人：Shree K. Nayar,Tomoo Mitsunaga申请号：US10886746申请日：20040707
公开号：US20040239798A1公开日：20041202
专利附图：
摘要：Apparatus and methods are provided for obtaining high dynamic range imagesusing a low dynamic range image sensor. The scene is exposed to the image sensor in a
spatially varying manner. A variable-transmittance mask, which is interposed between thescene and the image sensor, imposes a spatially varying attenuation on the scene lightincident on the image sensor. The mask includes light transmitting cells whosetransmittance is controlled by application of suitable control signals. The mask isconfigured to generate a spatially varying light attenuation pattern across the imagesensor. The image frame sensed by the image sensor is normalized with respect to thespatially varying light attenuation pattern. The normalized image data can be
interpolated to account for image sensor pixels that are either under or over exposed toenhance the dynamic range of the image sensor.
申请人：NAYAR SHREE K.,MITSUNAGA TOMOO
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