JP6651478B2 - 画像センサにおける画素ビニング - Google Patents
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Description
1002 第1のデジタル対角加算信号を記憶
1004 対角的に隣接する画素からの電圧信号を合成し、これを読み出して、第2のデジタル対角加算信号を生成
1006 第1及び第2のデジタル対角加算信号を共に加算
1008 電荷を加算して検知領域から読み出した後に、電圧信号を合成して画素配列から読み出すことにより、画素を直交方向にビニング
Claims (20)
- 複数の画素を含む画素アレイを有する画像センサ内の電荷をビニングする方法であって、
第1の対角方向に沿って位置する第1の画素の組内の電荷を加算して、第1の対角加算信号を生成し、該第1の対角加算信号を前記画素アレイから読み出すステップと、
第2の対角方向に沿って位置する第2の画素の組から読み出された電圧信号を合成することによって、第2の対角加算信号を生成するステップと、
第1の直交方向に沿って位置する第3の画素の組内の電荷を加算して、直交加算信号を生成するステップと、
を含むことを特徴とする方法。 - 前記第1の画素の組が、第1のBayerのカラーフィルタ配列における第1の緑色平面及び第2の緑色平面と関連する画素を含む、
ことを特徴とする請求項1に記載の方法。 - 前記第2の画素の組が、第2のBayerのカラーフィルタ配列における第1の緑色平面と関連する第1の画素及び第3のBayerのカラーフィルタ配列における第2の緑色平面と関連する第2の画素を含む、ことを特徴とする請求項2に記載の方法。
- 前記第2の対角方向が、前記第1の対角方向とは異なる方向である、ことを特徴とする請求項1記載の方法。
- 前記第1の対角方向と第2の対角方向とが、同じ方向である、ことを特徴とする請求項1記載の方法。
- 前記画素アレイから、前記直交加算信号を読み出すステップを更に含む、ことを特徴とする請求項1記載の方法。
- 前記直交加算信号が第1の直交加算信号を含み、前記方法が、
前記第1の直交方向に沿って位置する第4の画素の組内の電荷を加算することによって、第2の直交加算信号を生成するステップと、
前記第1の直交加算信号及び前記第2の直交加算信号を合成することによって、合成された信号を生成するステップと、を更に含む、ことを特徴とする請求項1記載の方法。 - 前記第1の対角加算信号を第1のデジタル対角加算信号に変換するステップと、
前記第2の対角加算信号を第2のデジタル対角加算信号に変換するステップと、
前記第1のデジタル対角加算信号を前記第2のデジタル対角加算信号と合成することによって、合成された信号を生成するステップと、を更に含むことを特徴とする請求項1記載の方法。 - 複数の画素を含む画素アレイを有する画像センサ内の電荷をビニングする方法であって、
前記画素アレイの第1の直交方向に沿って位置する第1の画素の組内の電荷を加算することによって、第1の直交加算信号を生成するステップと、
前記第1の直交方向に沿って位置する第2の画素の組内の電荷を加算することによって、第2の直交加算信号を生成するステップと、
前記第1の直交加算信号及び前記第2の直交加算信号の電圧を合成することによって、合成された信号を生成するステップと、
対角方向に沿って位置する第3の画素の組内の電荷の和を表す対角加算信号を生成するステップと、
を含むことを特徴とする方法。 - 前記対角方向に沿って位置する前記第3の画素の組内の電荷の前記和を表す前記対角加算信号を生成し、画素アレイから前記対角加算信号を読み出すステップを更に含むことを特徴とする請求項9記載の方法。
- 前記対角加算信号を生成するステップが、前記第3の画素の組内の電荷を加算することを含むことを特徴とする請求項10記載の方法。
- 前記対角加算信号を生成するステップが、前記第3の画素の組内の各画素から電圧信号を読み出すことを含むことを特徴とする請求項10記載の方法。
- 前記第1の画素の組内の前記電荷が、前記第1の画素の組で共有される第1の読み出し回路の第1の共通ノードで加算されるステップと、
前記第2の画素の組内の前記電荷が、前記第2の画素の組で共有される第2の読み出し回路の第2の共通ノードで加算されるステップと、を含むことを特徴とする請求項10記載の方法。 - 前記合成された信号を生成するステップが、第1の読み出し回路に接続された第1の出力線を、前記第2の読み出し回路に接続された第2の出力ラインに電気的に結合することを含むことを特徴とする請求項13記載の方法。
- 前記第1の画素の組が、第1のBayerのカラーフィルタ配列における青色平面と関連する画素を含み、前記第2の画素の組が、第2のBayerのカラーフィルタ配列における青色平面と関連する画素を含む、ことを特徴する請求項9に記載の方法。
- 前記第1の画素の組が、第1のBayerのカラーフィルタ配列における赤色平面と関連する画素を含み、前記第2の画素の組が、第2のBayerのカラーフィルタ配列における赤色平面と関連する画素を含む、ことを特徴する請求項9に記載の方法。
- 前記第1の画素の組と前記第2の画素の組とを選択的に使用可能、使用不可能にする、ことを更に含む請求項9記載の方法。
- 画像取込装置であって、
複数の画素グループに分割された画素アレイであって、画素グループの各々が少なくとも2×2画素のアレイを含み且つ検知領域の組における各検知領域に動作可能に接続されている、画素アレイと、
前記検知領域の組を出力線の組に動作可能に接続する読み出し回路と、
前記出力線の組の第1の組を前記出力線の組の第2の組に動作可能に接続するスイッチと、
前記画素アレイ、前記読み出し回路、及び前記スイッチに動作可能に接続された処理装置であって、
一つの画素グループ内の2又はそれ以上の画素が、それぞれの検知領域上で電荷を加算することを選択的に可能にし、
異なる画素のグループ内の2又はそれ以上の画素を選択的に使用可能にし、
前記読み出し回路が、使用可能にされた画素の検知領域内のそれぞれの加算された電荷を表す1つ又はそれ以上の電圧信号を、前記出力線の組の1つ又はそれ以上の出力線上に、生成することを選択的に可能にし、
前記スイッチが前記出力線の組内の異なる出力線上の前記1つ又はそれ以上の電圧信号を合成することを選択的に可能にするように適合された、前記処理装置と、
を備えることを特徴とする画像取込装置。 - 前記処理装置は、前記画素アレイ、前記読み出し回路及び前記スイッチに動作可能に接続されており、
前記処理装置が、
第1の直交方向に沿って位置する第1の画素の組内の電荷を加算することによって、第1の直交加算信号を生成し、前記画素アレイから前記第1の直交加算信号を読み出し、
第2の直交方向に沿って位置する第2の画素の組から読み出された電圧信号を合成することによって、第2の直交加算信号を生成し、前記画素アレイから前記第2の直交加算信号を読み出し、
前記第1の直交加算信号及び前記第2の直交加算信号を合成することによって、合成された信号を生成することを特徴とする請求項18記載の画像取込装置。 - 前記処理装置が、前記画素アレイ、前記読み出し回路及び前記スイッチに動作可能に接続されており、
前記処理装置が、第1の対角方向に沿って位置する画素の組内の電荷を加算することによって、直交加算信号を生成することを特徴とする請求項18記載の画像取込装置。
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