Data Editing

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Revision as of 09:34, 27 December 2015 by Meinan (talk | contribs) (Created page with "=== パススルー選択 ===")
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編集

スキャナーから情報を取得した後、不必要な部分やノイズを取り除いてデータをきれいにしたり、メッシュから不必要な部品を取り除く必要がある場合があります。

データの選択

まず、画像で削除する部分を選択します。選択ツールは、取得データおよびメッシュの両方に使うことができますが、アウトライアー選択機能は、取得データのみで使用できます。

選択ツール

選択ツールはインタラクティブなツールで、マウスの左ボタンを使って、3Dビュー上でドラッグ操作できます。マウスの動作に従って形状が生成され、その境界線内の情報がすべて選択されます。

ツール:

  • Rectangular(長方形):最初にクリックした点から始まる長方形を描写します。マウスの左ボタンを離すと、選択範囲が決定します
  • Elliptical(楕円):最初にクリックした点を中心とした楕円を描写します。マウスの左ボタンを離すと、選択範囲が決定します
  • Polygonal(多角形):2点をクリックして線を引き、3点目から多角形を描写します。ダブルクリックで多角形を閉じ、その境界線内のすべての領域が選択されます
  • Free Closed Line(フリー閉曲線):マウスの左ボタンをドラッグして閉曲線を描写します。マウスの左ボタンを離して線を閉じ、その境界線内のすべての領域が選択されます
  • Free Open Line(フリー開曲線):マウスの左ボタンをドラッグして開曲線を描写します。マウスの左ボタンを離すと、描写した線の下にあるデータがすべて選択されます
  • Segment(セグメント):マウスのドラッグ操作で線を引き、マウスの左ボタンを離すと、そのセグメント直下のデータがすべて選択されます。

Dental 2 5 selectionTools.gif

データの選択解除

ツールのいずれかを使う際に、Key ctrl.pngを押すことで、選択する代わりに、選択解除します

パススルー選択

The Pass through selection, changes the behaviour of the selection and only works on meshes data.

Normally all the data inside the drawn area will be selected, even if not visible or hidden behind other mesh surfaces.

By holding Key shift.png when finalizing the selection, only the visible part of the mesh will be selected. All the hidden parts, or the parts on the other side of the object, will not be selected.

Outlier Cleaning

Outliers are all the points of an acquisition that are not part of the object surface, such as noises, reflections or acquisition defects.

Each acquisition strategy already applies a specific outlier cleaning process. Therefore, data is often ready to be aligned and converted in mesh directly after the acquisition.

In order to remove outliers manually, use one of the three Select Outliers tools.

Select Outliers

This tool identifies all the points that are isolated, far from all the other points. Click on this tool button to open a window containing two parameters

  • Selectivity : how many points have to be near each other to consider them either isolated or not. The higher the value, the more points get selected
  • Strength : how close two points have to be to consider them as not isolated. The higher the value, the more points get selected

When changing the parameters, the software will show the selection in real time. Click ok to confirm the selection.

Select Outliers by Angle

This Outliers selection provides only one parameter: an angle. A point is considered an outlier only if there are no points near it that create an angle smaller than the one established by the parameters. The smaller the angle, the less points selected.

When changing the parameters, the software will show the selection in real time. Click ok to confirm the selection.

Select Outliers Segmentation

This Outliers selection tool analyses blocks of points and not single points.

Base Selection

To remove the Base of the acquisition (the part of the acquisition near the model holder) use the Cut Height Acquisition Tool.

A slider will appear, which controls the height value. All the points below the chosen height will be selected.

When moving the slider, the software will show the selection in real time. Click ok to confirm the selection.

Editing Functions

When a selection is performed, use one of the following editing functions either from the 3D View Context Menu, from the Edit Menu or using the related keyboard shortcuts:

  • Delete Selection (DEL) : deletes the currently selected data
  • Crop Selection (Key ctrl.png+ K) : keeps only the selected data and removes all the rest
  • Invert Selection (Key ctrl.png+ I) : selects all the data that is not selected and deselects the selected data
  • Clear Selection (Key ctrl.png+ C) : deselects all the data
  • Select All (Key ctrl.png+ Key shift.png+ C) : selects all the data
  • Select Connected (Key alt.png+ Key shift.png+ D) : (only for meshes) extends the selection to get all the parts connected to the current selection area
  • Dilate Selection (Key ctrl.png+ D) : extends the selection to the data adjacent to the actual selection
  • Erode Selection (Key ctrl.png+ Key shift.png+ D) : reduces the margins of the selection
Dental 2 5 wiz prev.png Homebutton.png Dental 2 5 wiz next.png