SOLID STATE IMAGING DEVICE

PROBLEM TO BE SOLVED: To provide a solid state imaging device capable of appropriate HDR processing even if an inversion phenomenon occurs in an output signal of a pixel.SOLUTION: In a solid state imaging device, a gain adjustment part 1 adjusts pixel data GH, GM and GL according to sensitivity rati...

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Bibliographic Details
Main Authors TAJIMA TETSUO, IKEDA YUSUKE
Format Patent
LanguageEnglish
Japanese
Published 19.03.2015
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Summary:PROBLEM TO BE SOLVED: To provide a solid state imaging device capable of appropriate HDR processing even if an inversion phenomenon occurs in an output signal of a pixel.SOLUTION: In a solid state imaging device, a gain adjustment part 1 adjusts pixel data GH, GM and GL according to sensitivity ratio of each pixel sensitivity and sensitivity of maximum sensitivity pixel, and outputs the adjusted data as gain adjusted pixel data GH, GMm, and GLm. An inversion determination part 3 determines if a pixel, having higher sensitivity within two pixels from an output source, is inverted or not if both of the two pixel data are determined as valid by a validity determination part 2. A blending part 4 blends gain adjusted pixel data for the two pixel data if the inversion determination part 3 determines that the pixel is not inverted. A selection part 5 selects one datum within gain adjusted pixel data GH, GMm, GLm, and output data M/H, L/M from the blending part 4, according to a determination result H1 by the validity determination part 2 and a determination result H2 by the inversion determination part 3, and then outputs the selected datum as HDR output. 【課題】画素の出力信号に反転現象が発生しても、適切なHDR化処理行うことのできる固体撮像装置を提供する。【解決手段】実施形態の固体撮像装置は、ゲイン調整部1が、画素データGH、GM、GLを各画素の感度と最高感度画素の感度との感度比に応じて補正し、ゲイン調整画素データGH、GMm、GLmとして出力する。反転判定部3は、有効判定部2により2つの画素データがともに有効と判定されたときに、出力元の2つの画素の感度の高い方の画素が反転状態かどうかを判定する。ブレンド部4は、反転判定部3が非反転状態と判定したときに、その2つの画素データに対するゲイン調整画素データをブレンドする。選択部5は、有効判定部2の判定結果H1および反転判定部3の判定結果H2にもとづき、ゲイン調整画素データGH、GMm、GLmおよびブレンド部4の出力データM/H、L/Mの中からいずれか1つを選択し、HDR出力として出力する。【選択図】 図1
Bibliography:Application Number: JP20130186016