JP6132510B2 - 三次元映像獲得装置、及び三次元映像獲得装置における奥行き情報の算出方法 - Google Patents
三次元映像獲得装置、及び三次元映像獲得装置における奥行き情報の算出方法 Download PDFInfo
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- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
そして、信号処理部106は、第1平均映像Vと第2平均映像Uとの比率V/Uについてのアークタンジェント(arctan=tan−1)の値から奥行き情報を算出する。奥行き情報depthは、下記の数式10の通りである。
101 光源、
103 光変調器、
105 撮像素子、
106 信号処理部、
107 制御部、
108 フィルタ、
109 第1レンズ、
110 第2レンズ、
200 被写体。
Claims (27)
- N個(ここで、Nは、3以上の自然数)の光が一定の時間間隔で順次、被写体に向けて投射されたときに、当該被写体から反射された光を変調させる光変調器と、
前記光変調器により変調された光を撮影して、N個のサブ映像を生成する撮像素子と、
前記N個のサブ映像を利用して、被写体との距離を表す奥行き情報を算出する信号処理部と、を備え、
1個の前記サブ映像を生成する際に、前記撮像素子は、前記光の投射時間露光されて、前記変調された光を撮影し、他のサブ映像のための次の投射開始時刻までに撮影により生成した前記サブ映像を出力することを特徴とする三次元映像獲得装置。 - 前記N個の投射された光は、相異なる光であり、一つ以上の光源により発光されることを特徴とする請求項1に記載の三次元映像獲得装置。
- 前記光変調器の駆動時間は、前記N個の光の投射時間にそれぞれ同期されることを特徴とする請求項1又は2に記載の三次元映像獲得装置。
- 前記駆動時間は、前記光の投射時間より短いことを特徴とする請求項3に記載の三次元映像獲得装置。
- 前記撮像素子の露光時間は、前記駆動時間に同期されることを特徴とする請求項3又は4に記載の三次元映像獲得装置。
- 前記撮像素子のあらゆるピクセルは、前記光の投射時間の間、前記変調された光に露光されることを特徴とする請求項3〜5のいずれか1項に記載の三次元映像獲得装置。
- 前記N個の光は、周期が同じであり、振幅と位相のうち少なくとも一つが相異なる周期波であることを特徴とする請求項1〜6のいずれか1項に記載の三次元映像獲得装置。
- 前記光変調器は、同じ変調信号で反射光を変調することを特徴とする請求項7に記載の三次元映像獲得装置。
- 前記N個の光は、同じ周期波であることを特徴とする請求項1〜6のいずれか1項に記載の三次元映像獲得装置。
- 前記光変調器は、異なる変調信号で反射光を変調することを特徴とする請求項9に記載の三次元映像獲得装置。
- 前記N個の光のうち、隣接した時間帯に投射される光の位相差は、360°をN個に等分した値であることを特徴とする請求項1〜10のいずれか1項に記載の三次元映像獲得装置。
- 前記反射された光は、前記N個の光のうち、前記被写体から反射されるN個の反射光を含むことを特徴とする請求項1〜11のいずれか1項に記載の三次元映像獲得装置。
- 前記撮像素子で生成されたN個のサブ映像は、前記N個の反射光と、順次、一対一マッチングされることを特徴とする請求項1〜12の何れか1項に記載の三次元映像獲得装置。
- 前記信号処理部は、
前記N個のサブ映像に第1加重値をそれぞれ乗じた後で平均して第1平均映像を生成し、前記N個のサブ映像に第2加重値をそれぞれ乗じた後で平均して第2平均映像を生成し、前記第1及び第2平均映像から前記奥行き情報を算出することを特徴とする請求項1〜13の何れか1項に記載の三次元映像獲得装置。 - 前記奥行き情報は、第1平均映像と第2平均映像との比率についてのアークタンジェント値から算出されることを特徴とする請求項14に記載の三次元映像獲得装置。
- N個(ここで、Nは、3以上の自然数)の光が一定の時間間隔で順次、被写体に向けて投射されたときに、当該被写体から反射された光を変調させるステップと、
前記変調された光を撮影して、N個のサブ映像を生成するステップと、
前記N個のサブ映像を利用して、被写体との距離を表す奥行き情報を算出するステップと、を含み、
前記N個のサブ映像を生成するステップは、1個の前記サブ映像を生成するサブステップをN個含み、
前記サブステップは、1個の前記サブ映像を生成する際に、前記光の投射時間露光されて、前記変調された光を撮影し、他のサブ映像のための次の投射開始時刻までに撮影により生成した前記サブ映像を出力することを特徴とする奥行き情報の算出方法。 - 前記N個の投射された光は、相異なる光であり、一つ以上の光源により発光されることを特徴とする請求項16に記載の奥行き情報の算出方法。
- 前記光を変調させる光変調器の駆動時間は、前記N個の光の投射時間にそれぞれ同期されることを特徴とする請求項16又は17に記載の奥行き情報の算出方法。
- 前記駆動時間は、前記光の投射時間より短いことを特徴とする請求項18に記載の奥行き情報の算出方法。
- 前記光を撮影する撮像素子の露光時間は、前記駆動時間に同期されることを特徴とする請求項18又は19に記載の奥行き情報の算出方法。
- 前記撮像素子のあらゆるピクセルは、前記光の投射時間の間、前記変調された光に露光されることを特徴とする請求項18〜20の何れか1項に記載の奥行き情報の算出方法。
- 前記N個の光は、周期が同じであり、振幅と位相のうち少なくとも一つが相異なる周期波であり、
前記変調された光は、同じ変調信号で変調されることを特徴とする請求項16〜21の何れか1項に記載の奥行き情報の算出方法。 - 前記N個の光は、同じ周期波であり、
前記変調された光は、異なる変調信号で変調されることを特徴とする請求項16〜21の何れか1項に記載の奥行き情報の算出方法。 - 前記N個の光のうち、隣接した時間帯に投射される光の位相差は、360°をN個に等分した値であることを特徴とする請求項19〜23のいずれか1項に記載の奥行き情報の算出方法。
- 前記生成されたN個のサブ映像は、前記N個の反射光と、順次、一対一マッチングされることを特徴とする請求項16〜24の何れか1項に記載の奥行き情報の算出方法。
- 前記N個のサブ映像に第1加重値をそれぞれ乗じた後で平均して第1平均映像を生成し、前記N個のサブ映像に第2加重値をそれぞれ乗じた後で平均して第2平均映像を生成し、前記第1及び第2平均映像から前記奥行き情報を算出することを特徴とする請求項16〜25の何れか1項に記載の奥行き情報の算出方法。
- 前記奥行き情報は、第1平均映像と第2平均映像との比率についてのアークタンジェント値から算出されることを特徴とする請求項26に記載の奥行き情報の算出方法。
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WO2014196202A1 (ja) * | 2013-06-07 | 2014-12-11 | パナソニックIpマネジメント株式会社 | 画像取得装置、画像取得方法、およびプログラム |
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US20130101176A1 (en) | 2013-04-25 |
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