JP7392105B2 - 没入型ビデオコンテンツをフォービエイテッドメッシュを用いてレンダリングするための方法、システム、および媒体 - Google Patents
没入型ビデオコンテンツをフォービエイテッドメッシュを用いてレンダリングするための方法、システム、および媒体 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/122—Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/344—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays
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- G—PHYSICS
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/111—Transformation of image signals corresponding to virtual viewpoints, e.g. spatial image interpolation
- H04N13/117—Transformation of image signals corresponding to virtual viewpoints, e.g. spatial image interpolation the virtual viewpoint locations being selected by the viewers or determined by viewer tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/172—Processing image signals image signals comprising non-image signal components, e.g. headers or format information
- H04N13/178—Metadata, e.g. disparity information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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- H04N13/279—Image signal generators from 3D object models, e.g. computer-generated stereoscopic image signals the virtual viewpoint locations being selected by the viewers or determined by tracking
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- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N2013/0074—Stereoscopic image analysis
- H04N2013/0088—Synthesising a monoscopic image signal from stereoscopic images, e.g. synthesising a panoramic or high resolution monoscopic image
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Description
本出願は、ここに参照によりその全体が本明細書に組み込まれている、2019年7月28日に出願した米国特許仮出願第62/879,529号の利益を主張するものである。
clamped_coord = clamp(0.0, 1.0, normalized_coord)
foveated_coord = 0.5 + atan(sqrt(foveation_ratio) * tan((clamped_coord - 0.5) * π)) / π
clamped_coord = clamp(0.0, 1.0, normalized_coord)
unfoveated_coord = atan(tan((clamped_coord - 0.5) * π)) / sqrt(foveation_ratio)) / π + 0.5
200 例示的な例、プロセス
300 例示的な例、ハードウェア
302 コンテンツサーバ、デバイス
304 通信ネットワーク
306 ユーザデバイス
308 ユーザデバイス
310 ユーザデバイス
312 通信リンク
314 通信リンク
400 ハードウェア
402 ハードウェアプロセッサ、コンポーネント
404 メモリおよび/またはストレージ、コンポーネント
406 入力デバイスコントローラ、コンポーネント
408 入力デバイス
410 ディスプレイ/オーディオドライバ、コンポーネント
412 ディスプレイおよびオーディオ出力回路、ディスプレイ/オーディオ出力デバイス
414 通信インターフェース、コンポーネント
416 アンテナ
418 バス
Claims (19)
- 没入型ビデオコンテンツを生成するための方法であって、
ビデオコンテンツアイテムを受信するステップと、
ハードウェアプロセッサを使用して、前記ビデオコンテンツアイテムが少なくとも1つの基準を満たすかどうかを判定するステップと、
前記ビデオコンテンツアイテムが前記少なくとも1つの基準を満たすとの判定に応答して、前記ハードウェアプロセッサを使用して、前記ビデオコンテンツアイテムのフレームがその上に投影されることになるフォービエイテッドメッシュを、フォービエイション比パラメータに従って生成するステップであって、前記フォービエイテッドメッシュが、前記ビデオコンテンツアイテムの各フレームの中心部分内の画素密度を前記ビデオコンテンツアイテムの各フレームの周辺部分と比べて高める非一様なポジションマップを有する、ステップと、
前記ビデオコンテンツアイテムを、前記生成されたフォービエイテッドメッシュを含むファイル形式で記憶するステップと
を含み、前記没入型ビデオコンテンツが、前記ビデオコンテンツアイテムをテクスチャとして、前記生成されたフォービエイテッドメッシュに貼り付けることによってレンダリングされる、方法。 - 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが特定のファイル形式に関連するかどうかを判定することを含む、請求項1に記載の方法。
- 前記特定のファイル形式が、視野180度の方向性立体視投影を使用するVR180ファイル形式を含む、請求項2に記載の方法。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが立体視コンテンツを含むか、それとも平面視コンテンツを含むかを判定することを含み、前記方法が、前記受信したビデオコンテンツアイテムが立体視コンテンツを含むとの判定に応答して前記フォービエイテッドメッシュを生成するステップをさらに含む、請求項1に記載の方法。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが静的ビデオであるか、それとも動的ビデオであるかを判定することを含み、前記静的ビデオが、ビデオコンテンツが捕捉されたときにカメラが実質的に移動しなかったビデオコンテンツを含み、前記動的ビデオが、カメラモーションメタデータトラックを含み、前記方法が、前記受信したビデオコンテンツアイテムが前記静的ビデオであるとの判定に応答して前記フォービエイテッドメッシュを生成するステップをさらに含む、請求項1に記載の方法。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが特定のタイプの入力メッシュに関連付けられているかどうかを判定することを含み、前記方法が、前記受信したビデオコンテンツアイテムが切出しエクイレクタングラーメッシュに関連付けられているとの判定に応答して前記フォービエイテッドメッシュを生成するステップをさらに含む、請求項1に記載の方法。
- 前記フォービエイテッドメッシュが、前記切出しエクイレクタングラーメッシュの2次元UVマップを、多項式フィッティング関数を使用して変形することによって生成される、請求項6に記載の方法。
- 前記受信したビデオコンテンツアイテムが第1の画素解像度から第2の画素解像度にダウンサンプリング比だけダウンサンプリングされているとの判定に応答して、前記フォービエイテッドメッシュが生成され、前記ビデオコンテンツアイテムの各フレームの前記中心部分における改善比が、前記ダウンサンプリング比と一致する、請求項1に記載の方法。
- 前記ビデオコンテンツアイテムおよび前記生成されたフォービエイテッドメッシュをユーザデバイスに、前記ユーザデバイスから前記ビデオコンテンツアイテムを求める要求を受信したことに応答して送信するステップをさらに含む、請求項1に記載の方法。
- 没入型ビデオコンテンツを生成するためのシステムであって、
メモリと、
ハードウェアプロセッサと
を備え、前記ハードウェアプロセッサが、前記メモリ内に記憶されたコンピュータ実行可能命令を実行すると、
ビデオコンテンツアイテムを受信することと、
前記ビデオコンテンツアイテムが少なくとも1つの基準を満たすかどうかを判定することと、
前記ビデオコンテンツアイテムが前記少なくとも1つの基準を満たすとの判定に応答して、前記ビデオコンテンツアイテムのフレームがその上に投影されることになるフォービエイテッドメッシュを、フォービエイション比パラメータに従って生成することであって、前記フォービエイテッドメッシュが、前記ビデオコンテンツアイテムの各フレームの中心部分内の画素密度を前記ビデオコンテンツアイテムの各フレームの周辺部分と比べて高める非一様なポジションマップを有する、生成することと、
前記ビデオコンテンツアイテムを、前記生成されたフォービエイテッドメッシュを含むファイル形式で記憶することと
を行うように構成され、前記没入型ビデオコンテンツが、前記ビデオコンテンツアイテムをテクスチャとして、前記生成されたフォービエイテッドメッシュに貼り付けることによってレンダリングされる、システム。 - 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが特定のファイル形式に関連するかどうかを判定することを含む、請求項10に記載のシステム。
- 前記特定のファイル形式が、視野180度の方向性立体視投影を使用するVR180ファイル形式を含む、請求項11に記載のシステム。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが立体視コンテンツを含むか、それとも平面視コンテンツを含むかを判定することを含み、前記ハードウェアプロセッサが、前記受信したビデオコンテンツアイテムが立体視コンテンツを含むとの判定に応答して前記フォービエイテッドメッシュを生成することを行うようにさらに構成される、請求項10に記載のシステム。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが静的ビデオであるか、それとも動的ビデオであるかを判定することを含み、前記静的ビデオが、ビデオコンテンツが捕捉されたときにカメラが実質的に移動しなかったビデオコンテンツを含み、前記動的ビデオが、カメラモーションメタデータトラックを含み、前記ハードウェアプロセッサが、前記受信したビデオコンテンツアイテムが前記静的ビデオであるとの判定に応答して前記フォービエイテッドメッシュを生成することを行うようにさらに構成される、請求項10に記載のシステム。
- 前記少なくとも1つの基準を満たすか否かの判定が、前記受信したビデオコンテンツアイテムが特定のタイプの入力メッシュに関連付けられているかどうかを判定することを含み、前記ハードウェアプロセッサが、前記受信したビデオコンテンツアイテムが切出しエクイレクタングラーメッシュに関連付けられているとの判定に応答して前記フォービエイテッドメッシュを生成することを行うようにさらに構成される、請求項10に記載のシステム。
- 前記フォービエイテッドメッシュが、前記切出しエクイレクタングラーメッシュの2次元UVマップを、多項式フィッティング関数を使用して変形することによって生成される、請求項15に記載のシステム。
- 前記受信したビデオコンテンツアイテムが第1の画素解像度から第2の画素解像度にダウンサンプリング比だけダウンサンプリングされているとの判定に応答して、前記フォービエイテッドメッシュが生成され、前記ビデオコンテンツアイテムの各フレームの前記中心部分における改善比が、前記ダウンサンプリング比と一致する、請求項10に記載のシステム。
- 前記ハードウェアプロセッサが、前記ビデオコンテンツアイテムおよび前記生成されたフォービエイテッドメッシュをユーザデバイスに、前記ユーザデバイスから前記ビデオコンテンツアイテムを求める要求を受信したことに応答して送信することを行うようにさらに構成される、請求項10に記載のシステム。
- プロセッサによって実行されると前記プロセッサに没入型ビデオコンテンツを生成するための方法を実施させるコンピュータ実行可能命令を収容した、コンピュータ可読記憶媒体であって、前記方法が、
ビデオコンテンツアイテムを受信するステップと、
ハードウェアプロセッサを使用して、前記ビデオコンテンツアイテムが少なくとも1つの基準を満たすかどうかを判定するステップと、
前記ビデオコンテンツアイテムが前記少なくとも1つの基準を満たすとの判定に応答して、前記ハードウェアプロセッサを使用して、前記ビデオコンテンツアイテムのフレームがその上に投影されることになるフォービエイテッドメッシュを、フォービエイション比パラメータに従って生成するステップであって、前記フォービエイテッドメッシュが、前記ビデオコンテンツアイテムの各フレームの中心部分内の画素密度を前記ビデオコンテンツアイテムの各フレームの周辺部分と比べて高める非一様なポジションマップを有する、ステップと、
前記ビデオコンテンツアイテムを、前記生成されたフォービエイテッドメッシュを含むファイル形式で記憶するステップと
を含み、前記没入型ビデオコンテンツが、前記ビデオコンテンツアイテムをテクスチャとして、前記生成されたフォービエイテッドメッシュに貼り付けることによってレンダリングされる、コンピュータ可読記憶媒体。
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| US12299805B1 (en) | 2021-06-24 | 2025-05-13 | Apple Inc. | Immersive media content encoding and rendering |
| US12327314B1 (en) | 2021-06-30 | 2025-06-10 | Apple Inc. | Variable transparency layers for light-weight rendering |
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| US20240236355A9 (en) * | 2022-10-19 | 2024-07-11 | Samsung Electronics Co., Ltd. | Packing of displacements data in video frames for dynamic mesh coding |
| US20250298466A1 (en) * | 2024-03-20 | 2025-09-25 | Samsung Electronics Co., Ltd. | Adaptive foveation processing and rendering in video see-through (vst) extended reality (xr) |
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