JP5395678B2 - 距離マップ生成型マルチレンズカメラ - Google Patents
距離マップ生成型マルチレンズカメラ Download PDFInfo
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- G03B15/00—Special procedures for taking photographs; Apparatus therefor
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- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
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- G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
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Description
x=x1+x2=b・f/d
と表すことができる。なお、bはレンズ152,153間の光軸間距離即ち基線長である。この式から判るように、合計シフト幅xが判ればd=b・f/xの演算で被写体151までの距離dも判る。図示の装置で合焦面156上に2個の光学センサアレイ190,191が設けられているのは、それら個別又は合計のシフト幅x1,x2又はxを検出するためである。これらのアレイ190,191はいずれも光学センサ例えばCCD(電荷結合素子)デバイスを複数個有しており、それらのセンサは画像のうちそのセンサに入射した部分の光強度を表すアナログの光起電信号を出力する。特許文献1には、その特徴たる高速測距回路のほか、左側の光学センサアレイに発するディジタル画像信号からなる画像信号列と、右側の光学センサアレイに発するディジタル画像信号からなる画像信号列とを対比することにより、それらの間の合計シフト幅xを求める従来回路が示されている。
第1センサ出力をもたらす第1イメージセンサ及びその第1イメージセンサ上に視野内光景の第1画像を発現させる第1レンズを有する第1撮像部と、
第2センサ出力をもたらす第2イメージセンサ及びその第2イメージセンサ上に視野内光景の第2画像を発現させる第2レンズを有する第2撮像部と、
第1及び第2センサ出力のうち一方を撮像出力信号として選定する一方、光景内諸点までの距離を指し示す距離マップを第1及び第2センサ出力双方に基づき生成する処理部と、
を備える。
d=s・f/(p・m)
の関係を使用すればよい。表1に、ある撮像部における典型的な画素オフセット値を示す。本発明の好適な実施形態では、画素オフセットと光景内諸点までの距離との間に存するこうした関係を、既知距離にある視野内被写体に関し校正することで、複数個あるレンズ間に生じる不要な寸法ばらつき及び角度傾斜を補償することができる。
a)被写体の閉じた輪郭を識別してその形状を画定することにより、出力画像中の被写体を好適に識別すること
b)被写体の閉じた輪郭を識別してその画像を細分することにより、出力画像から被写体を抽出すること
c)被写体を検出し同一の被写体を複数枚の出力画像に亘り追跡することにより、それら複数枚の出力画像に亘る被写体の動きを追跡すること
d)出力画像のうち所望視界深さ外の光景領域に相応する部分をぼかすことにより、画像の視界深さを動的に変化させること
e)出力画像内の被写体に被写体単位で利得調整を施すことにより、その出力画像のダイナミックレンジを拡げること
f)出力画像のうち前景領域内諸被写体に相応する部分については利得を低下させ背景領域内諸被写体に相応する部分については増大させることにより、フラッシュ使用がもとで生じる露出上の問題を抑えること
g)前景領域内諸被写体を強調することにより、出力画像におけるシーンバランスを改善すること
等を、その距離マップに基づき実現することができる。
Claims (3)
- 撮像出力信号に基づき光景についての出力画像を生成する電子カメラであって、
第1センサ出力をもたらす第1イメージセンサ、第1イメージセンサ上に光景の第1画像を発現させる第1レンズ及び第1焦点検出信号に応じて第1レンズの焦点を調整する第1レンズ焦点調整器を有する第1撮像部と、
第2センサ出力をもたらす第2イメージセンサ、及び第2イメージセンサ上に光景の第2画像を発現させる第2レンズを有する第2撮像部と、
第1センサ出力を撮像出力信号として選定し、第2センサ出力に基づき第1撮像部向けの第1焦点検出信号を生成し、第1レンズ焦点調整器に第1焦点検出信号を供給することで第1レンズの焦点を調整し、その調整の後、光景内諸点までの距離の誤差分を第1及び第2センサ出力双方に基づき検出し、その誤差分に基づき第1レンズの焦点を再調整する処理部と、
を備える電子カメラ。 - 請求項1記載の電子カメラであって、その処理部が、第1及び第2画像を互いに関連付けることで画像内諸部分について画像間の画素オフセットを導出し、それらの画素オフセットを本電子カメラからの距離へと換算し、そして画像内諸部分までの距離を指し示す距離マップを生成する電子カメラ。
- 第1撮像部内の第1イメージセンサから光景の第1画像を示す第1センサ出力を得るステップと、
第2撮像部内の第2イメージセンサからその光景の第2画像を示す第2センサ出力を得るステップと、
第1センサ出力を撮像出力信号として選定し、第2センサ出力に基づき第1撮像部向けの第1焦点検出信号を生成し、第1イメージセンサ上に第1画像を発現させる第1レンズの焦点を第1焦点検出信号に基づいて調整するステップと、
光景内諸点までの距離の誤差分を第1及び第2撮像部双方の出力に基づき検出するステップと、
その誤差分に基づき第1レンズの焦点を再調整するステップと、
を有し、撮像部を2個備える電子カメラを使用し出力画像を得る一方でそのセンサ出力からその光景についての距離マップを生成する方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/684,036 | 2007-03-09 | ||
US11/684,036 US7683962B2 (en) | 2007-03-09 | 2007-03-09 | Camera using multiple lenses and image sensors in a rangefinder configuration to provide a range map |
PCT/US2008/001710 WO2008112054A1 (en) | 2007-03-09 | 2008-02-08 | Multiple lens camera providing a range map |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2010524279A JP2010524279A (ja) | 2010-07-15 |
JP2010524279A5 JP2010524279A5 (ja) | 2012-03-22 |
JP5395678B2 true JP5395678B2 (ja) | 2014-01-22 |
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Application Number | Title | Priority Date | Filing Date |
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JP2009553574A Active JP5395678B2 (ja) | 2007-03-09 | 2008-02-08 | 距離マップ生成型マルチレンズカメラ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7683962B2 (ja) |
EP (1) | EP2119222A1 (ja) |
JP (1) | JP5395678B2 (ja) |
CN (1) | CN101637019B (ja) |
WO (1) | WO2008112054A1 (ja) |
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