（圖像3D建模）Agisoft PhotoScan Professional 1.1.4

Agisoft PhotoScan是一種先進的圖像3D建模解決專案，旨在建立從靜止圖像的專業品質3D內容。基於最新的多檢視三維重建技術，它的運行與任意圖像，並是有效的在兩個受控和非受控的條件。照片可以從任何位置，提供了一個目的，是要重建在至少兩個照片可見。這兩個形象定位和3D模型重建完全自動化。

它是如何工作的
在一般的照片處理由PhotoScan的最終目的是建立紋理的三維模型。照片處理和三維模型構建的過程內含三個主要階段。

1.第一階段是照片對齊。在此階段PhotoScan搜尋照片上的共同點和符合它們，以及它找到的攝影機的位置為每個畫面和細化攝影機校準參數。其結果是稀疏的點雲和該組攝影機位置的形成。

點雲表示照片對準的結果，並不會直接用於進一步的三維模型構建過程中（除點雲基於重建法）。然而，它可以匯出為進一步使用外部工具。用於案例中的點群模型所用的三維編輯作為參考使用。相反將需要進一步的3D模型構建由PhotoScan設定相機位置。

2.下一階段建設的幾何形狀。基於所估計的相機位置和圖片本身PhotoScan構建​​的3D多邊形網格，表示對象的表面上。在PhotoScan提供四種算法的方法可以應用於3D網格生成：任意 – 平滑，任意 – 夏普，身高領功能變數 – 平滑和高度場 – 夏普方法。此外，還有是僅基於稀疏點雲點雲基礎的方法快速幾何生成。構建網格之後，可能有必要對其進行編輯。一些修正，如網狀抽取，去除分離的元件，關閉在所述網狀等的孔可以通過PhotoScan進行。對於更複雜的編輯，你必須使用外部3D編輯器工具。 PhotoScan容許匯出的網格，用其他軟體編輯和匯入回來。

Agisoft PhotoScan is an advanced image-based 3D modeling solution aimed for creating the professional quality 3D content from still images. Based on the latest multi-view 3D reconstruction technology, it operates with arbitrary images and is efficient in both controlled and uncontrolled conditions. Photos can be taken from any positions, providing that an object to be reconstructed is visible on at least two photos. Both image alignment and 3D model reconstruction are fully automated.

How it works
In general the final goal of photographs processing by PhotoScan is to build the textured 3D model. The procedure of photographs processing and 3D model construction comprises three main stages.

1. First stage is the photographs alignment. At this stage PhotoScan searches for common points on photographs and matches them, as well as it finds positions of the camera for each picture and refines the camera calibration parameters. As a result the sparse point cloud and the set of camera positions are formed.

The point cloud represents the results of photos alignment and will not be directly used in the further 3D model construction procedure (except the point cloud based reconstruction method). However it can be exported for further usage by external tools. For instance the point cloud model can be used in the 3D editor as a reference. On the contrary the set of camera positions will be required for further 3D model construction by PhotoScan.

2. Next stage is building the geometry. Based on the estimated camera positions and pictures themselves PhotoScan builds the 3D polygon mesh, representing the object surface. The four algorithmic methods available in PhotoScan can be applied for 3D mesh generation: Arbitrary – Smooth, Arbitrary – Sharp, Height field – Smooth and Height field – Sharp methods. Additionally there is a Point Cloud based method for fast geometry generation based on the sparse point cloud alone. After building the mesh it may be necessary to edit it. Some corrections, such as mesh decimation, removal of detached components, closing of holes in the mesh and so on can be performed by PhotoScan. For more complex editing you have to engage external 3D editor tools. PhotoScan allows to export the mesh, edit it by another software and import it back.

3. After the geometry (i.e. the mesh) is generated, it may be textured and/or used for orthophoto generation. Several texturing modes are available in PhotoScan, they are described in the corresponding sections of this manual.

（圖像3D建模）Agisoft PhotoScan Professional 1.1.4 | Home Page: agisoft.ru

（圖像3D建模）Agisoft PhotoScan Professional 1.1.4 | Size: 40/47 MB