CloudCompare 2.6.1用户指南：全面详解与操作教程

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CloudCompare v2.6.1使用手册是一份详细的文档，专为理解、操作和掌握这款强大的3D点云处理工具而设计。该手册涵盖了CloudCompare的核心概念、用户界面、实体管理、数据加载与准备、比较方法以及一系列实用工具和算法。 **1. ** **简介** (Introduction) - 本手册首先提供了一个简短的历史概述，解释了CloudCompare的发展背景和其在点云处理领域的哲学，强调了它在版本2.6.1中的改进和特点。 **2. ** **点云与网格（Pointcloud vs. Mesh）** - 介绍了CloudCompare如何处理点云数据（无结构的数据集）和网格数据（有组织的几何模型），帮助用户理解这两种形式的区别和适用场景。 **3. ** **技术考虑** (Sometechnicalconsiderations) - 提供了一些技术细节，如关于存储效率与速度之间权衡的讨论，这有助于用户在实际操作中做出最佳选择。 **4. ** **可移植性与性能** (Portable) - 讨论了CloudCompare的便携性和如何适应不同平台，确保在不同的硬件环境下都能流畅运行。 **5. ** **近期发展与许可证** (Recentevolution & License) - 更新了最新的功能介绍，以及关于软件的许可证信息，包括是否允许商业使用或共享。 **6. ** **通用概念与图形用户界面** (Generalconcepts & GraphicalUserInterface) - 解释了CloudCompare的基础概念，如数据库树（DBtree）、拖放操作、选择与上下文菜单，以及如何通过GUI进行操作。 **7. ** **实体与属性管理** - 包括主实体（如点云、面片等）的管理和编辑，以及实体的属性设置，如标量场显示参数的编辑器。 **8. ** **支持的文件格式** (Supportedfileformats) - 列出了CloudCompare可以读取和处理的各种3D数据文件格式，以便用户能方便地导入他们的数据。 **9. ** **显示模式** (Displaymodes) - 主要展示模式的介绍，包括全球平移和缩放功能，以及为何这些功能对数据分析至关重要。 **10. ** **数据加载与预处理** (Loaddata & Datapreparation) - 详细指导如何加载数据，并涉及数据清理、标准化等预处理步骤，确保数据质量。 **11. ** **数据比较与工具** (Datacomparison & Tools) - 提供了比较两个三维实体的方法，以及File菜单下的操作，如打开、保存和使用PrimiteveFactory工具创建基本形状。 **12. ** **对齐与注册** (Alignment & Registration) - 覆盖了如何进行点云对齐和精确的几何体注册，这对于空间分析和配准至关重要。 **13. ** **教程与指南** (Tutorialsandguidelines) - 提供了一系列学习资源，帮助新用户快速上手，以及进阶用户深入理解高级功能。 CloudCompare v2.6.1使用手册是一个全面的指南，无论你是初次接触这个工具还是寻求更高级的功能，都将为你提供所需的信息和操作技巧。通过深入理解和掌握这些内容，用户能够更有效地处理和分析复杂的3D点云数据。

CloudCompare Version 2.6.1 – user manual

DB tree

Loaded entities are all stored in the ‘DB tree’ (on the left part by default). Some entities can depend on other ones (such

as a mesh and its vertices) or can also be regrouped (in Group entities ). This is why the database is displayed as a

hierarchical tree.

Drag and drop

Most of the entities can be drag and dropped In the DB tree (so as to regroup them typically). Entities dependent on

others are generally bound to their ‘parent’ however (labels, vertices, etc.).

Selection

Entities can be selected either directly in a 3D view (by left clicking on it) or by clicking on their corresponding entry in

the DB tree (which is generally faster and unambiguous).

Multiple entities can be selected at once by maintaining the CTRL or SHIFT keys pressed and selecting them in the DB

tree.

Equivalently the user can select multiple entities by holding the CTRL key and clicking on entities in the 3D views.

Another option is to hold the ALT key and drawing a rectangle in a 3D view. This way, all the entities falling at least

partly inside the rectangle will be selected:

Selection inside a rectangle (hold the ALT key while drawing the rectangle with the left mouse button pressed)

Context menu

A context menu can be spawned by clicking on an element of the DB tree with the right mouse button. Its content

depends on the type of the element.

CloudCompare Version 2.6.1 – user manual

Entity properties (a sphere here)

Most of the entities display properties can be set via this dialog:

 visibility of the entity

 visibility of its features (colors, normals, etc.)

 the current 3D view in which the entity is displayed (‘Current Display’ list)

 the active scalar field and its display parameters (current color scale, whether it should be displayed in the 3D

view and how, etc.)

 etc.

Other parameters can be modified such as

 ‘wireframe’ or ‘stippling’ – a kind of fake transparency – modes for a mesh for instance

 primitives parameters

 etc.

And of course various pieces of information:

 bounding-box center and extents

 the number of points or triangles

 the ‘Global shift and scale’

 associated meta-data

 etc.

There are even some action buttons sometimes (for viewport or sensor entities for instance).

Scalar field display parameters editor

In the Properties dialog, an editor very specific to CloudCompare can be found on clouds and entities with an active

scalar field:

Scalar field parameters editor

This editor lets the user set most of the display parameters of the active scalar field in a very concise way (in addition

to get a quick overview of the scalar field histogram):

 use the left and right white circles to set the min and max displayed scalar values. Below and above those

values, the points will either appear in grey or won’t appear at all (depending on the parameter ‘show NaN/out

of range values in grey’ that is accessible in the ‘Parameters’ tab). This way the user can quickly hide points

with values outside a given interval, in order to focus on the other points for instance.

 use the red and blue down arrows to set the min and max saturation values (to set the start and end of

‘relative’ color scales – see the ‘Scalar fields > Color Scales Manager’)

 set additional parameters with the ‘Parameters’ tab (log or symmetrical scale, etc.)

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