Rescue Mission: Using reality capture to plan the re-development of a former convent
Case study
作者：AndréAzevedo
在葡萄牙布拉加（Braga）的Carmo Church旁边，坐在1653年成立的前Carmelite修道院。
为了确定包括保险库，阁楼和水功能在内的复杂网站的最佳方法，Fortera询问了土木工程公司构建进行完整的几何调查。为了捕获构建BIM模型所需的数据，Buildgest的技术经理AndréAzevedo使用了Leica Geosystems 3D激光扫描解决方案。
Visualising the environment as it is in 3D
The convent has a complicated interior and exterior made up of multiple buildings, levels and outdoor space. Before Buildgest was appointed, Fortera had already commissioned a 2D survey. Unfortunately, this didn’t capture sufficient detail for them to move into the design phase of the development confidently. Azevedo explains, “The classic 2D survey has some flaws, so we proposed a laser scanning survey and an accurate architectural model for the building. This Building Information Model (BIM) will help the client´s architect team to study different intervention scenarios.”
使用简化的现实捕获解决方案在现场更快的扫描速度bob综合app赌博
With a potential construction area of 5,000 square metres, complex geometry and a six-week deadline, Buildgest needed to carry out their fieldwork quickly. If they took too long, their modelling team would not have enough time to complete the work.
Azevedo已经是Leica Geosystems用户选择的Leica BLK360imaging laser scanner,旋风寄存器360，，，，旋风场360，3dreshaper（Cyclone 3DR) andJetstream观看器software elements.
“我们需要设备,可以生产室内scanning quickly and accurately. The scanner is small and light compared to other equipment and that facilitated transportation to difficult zones of the buildings like attics and caves. The workflow between the products and software is smooth and quick. For example, Cyclone FIELD 360 pre-registers the scans automatically. That gives us faster scanning in the field,” explains Azevedo.
600 scans in seven days
Azevedo and his team used two BLK360 scanners in parallel for seven days to scan the convent buildings. The BLK360 - the smallest and lightest imaging laser scanner of its kind - captured the site with full-colour panoramic images overlaid on a high-accuracy point cloud. To make sure that the overall point cloud was accurate, Buildgest established a survey control network with laser scan targets around the building and in the interior.
总共进行了600张详细的扫描。为了提高效率，Azevedo使用Cyclone Field 360移动设备应用程序在仍在现场时预先注册点云。用他的话说：“对现场收集的信息进行预注册为后处理任务节省了时间。”
易于同步，互操作性和处理
Back in the office, the Buildgest team used Cyclone REGISTER 360 to clean and register the scans, creating a unified point cloud. Azevedo says, “The synchronisation between Cyclone FIELD and Cyclone REGISTER is good and makes it easy to use.”
处理包括给出一些形状更多的定义。Azevedo解释说：“观赏细节，例如在内部露台上的中央喷泉是在3dreshaper的帮助下建模的。”然后，在五个星期的时间内，由两个建模者组成的团队进一步处理数据，为客户创建完整的体系结构BIM模型。Azevedo将准确扫描数据的价值解释为对此过程的价值，“对修道院的现有保管库进行建模是具有挑战性的，使用点云帮助我们完全了解了这些元素的几何形状。”
“通过摄影记录来查看模型很有帮助”
几何调查完成后，建立了他们的发现向Fortera提出。除了交付BIM模型以及数据的LGS文件外，Build ford offest使用了Cyclone Publisher Pro和JetStream Viewer，以向客户端展示如何探索和移动点云。他们认为这是传达结果的最佳方法。
“我们始终向客户推荐Jetstream观看器，因为使用摄影记录来查看模型更为具体和有用。使用查看器，客户端能够看到在扫描过程中捕获的360张图像。此外，它使他们可以选择使用简单的直观工具导航点云。” Azevedo解释说。JetStream Viewer Portable是一个免费的，不安装的版本，旨在轻松可视化，以便没有调查培训经验点云数据的人。
构建was able to complete the project quickly without compromising on quality. Pedro Ferreira, chief engineer at Fortera, says, “Fortera was truly satisfied with the amount and quality of information that was delivered.” Now it’s over to the developer’s architects to plan a reinvention of the buildings, adding another chapter to the convent’s 350-year story.
