bob综合app赌博现实捕捉plays central role in National Geographic’s Lost Cities with Albert Lin

Author: Duncan M B Lees

A ground-breaking new TV series for National Geographic combines hi-tech science, breath-taking visuals and genuine exploration to bring to life some of the most extraordinary sites of antiquity.失落的城市与艾伯特·林（Albert Lin）来自布莱克威（Blakeway）的作品遵循探险家艾伯特·尤·敏（Albert Yu-Min Lin）博士，他发现了有关被遗忘的城市和文化的新见解。

高清3D映射专家视觉skieswere brought in to provide a bespoke 3D scanning service on location and create the spatial data visualisations for the show. Duncan M B Lees, 3D Scanning Specialist, Visualskies explains, “We worked closely with Albert and the Blakeway crew to develop a narrative based upon a scientific approach to the collection of spatial data. The result is a series of ambitious programmes that deliver powerful, emotional stories with our hi-tech imagery.”

为了使过去的奥秘在当前生动地成为焦点，Visualskies使用了Leica Geosystems激光扫描解决方案。

Laser scanning: an exciting new tool for archaeology and exploration

Laser scanning technology was crucial to capture and remodel a level of 3D detail otherwise impossible to achieve, to build a picture of how reality would have looked to our ancestors. Speaking about ruins in Akko (Acre) in Israel, Lees explains, “Utilising drones, terrestrial and aerial laser scanners and our custom-built AR software we enabled Albert to step back in time and truly visualise the city as it used to be in Crusader times.”

视觉skies put together a custom combination of scanning equipment, including theLeica扫描仪P50远程3D陆地激光扫描仪，高度便携Leica RTC3603D laser scanner andLeica Cycloneand 3DReshaper (Cyclone 3DR) point cloud processing software.

满足具有挑战性的天气状况和难以接近的地形

All of the sites chosen to be included in the program posed challenges for the film and survey crew. From 50-degree deserts in Jordan to the high altitude of Machu Picchu, where “processing in tents up in the rarefied atmosphere with only a pair of temperamental generators for power was less than ideal,” says Lees. The equipment used needed to be both portable and durable. The long-range capabilities of the ScanStation P50 meant that the crew could cover large areas and scan inaccessible sites from a place of safety, while still capturing a high level of detail. The laser scanner is quick to set up, can perform at extreme temperature ranges and is tough enough to withstand a jungle trek.

在哥伦比亚圣玛尔塔（Santa Marta）进入佩迪达（Ciudad Perdida）（字面上是“失落的城市”），需要一段漫长的旅程，涉及第一架飞机和直升机，然后是远足，而团队携带着他们需要的一切。Lees解释说：“我们对失落城市现存的遗体的第一印象是一种壮观的空中视图，强调了记录城市和佩迪达周围广阔景观的困难。”

“令人震惊的影响：”使用3dreshaper通过茂密的植被'看到'

One of these difficulties was dense vegetation. Lees explains: “The majority of the Tayrona complex (in Ciudad Perdida) is almost invisible due to the lush tree cover over the whole Sierra Nevada mountain range, so it was going to be almost impossible to document, digitise and visualise the lost remains using solely traditional survey techniques.”

The team used a combination of aerial and terrestrial scanning techniques and 3DReshaper (Cyclone 3DR) in post-processing to achieve their goal. “It is a perfect solution for cleaning, segmenting and filtering point clouds for a number of 3D modelling and inspection deliverables. 3DReshaper provides us with the ability to strip away the tree cover and visualise what lies below; something that has had a startling impact on many of the projects we have undertaken.”

Easing the pressure of tight timescales and ‘one chance’ to get results

除了地理限制外，Visualskies还需要快速调查，以满足行进时间表和紧密的电影制作截止日期。“整体的时间表Lost Cities系列非常紧凑；通过数字记录众多站点，可视化遗体并拍摄整个程序，所有程序都在一个相对较短的并发时间范围内进行。” Lees解释说。

The equipment used needed to be quick to set-up and easy-to-use, reducing the stress and pressure that the team were under. Both the Scanstation P50 and RTC360 are fast scanners. Using the ScanStation P50 the team were able to capture an entire site at Khirbet al-Darieh, Jordan - and have a 3D model ready to film for broadcast - in just one day.

Lees says that “the RTC360 has been a game changing addition to our 3D reality capture capabilities. We can now collect over twice as much data in any working shift or, more importantly, halve our time capturing data at any location.” The speed of processing software is equally as important. Lees continues, “Cyclone can process huge amounts of terrestrial laser scanning data - hundreds of individual scanner setups resulting in many hundreds of millions of individual points - enabling the registration, manipulation and analysis of the resulting geospatial point cloud dataset with ease.”

“The use of laser scanning and 3D modelling on失落的城市与艾伯特·林（Albert Lin）was not only fascinating for audiences, but it has also real archaeological value too,” says Lees. For example, on the Pacific island of Pohnpaip, the Visualskies crew scanned an extraordinary collection of over 700 prehistoric motifs carved into a natural basalt terrace. “By creating 3D models of the petroglyphs, we enabled Albert and the crew to clarify the exact form of the fading petroglyphs, to study them in detail and to make comparisons with other ancient carvings from elsewhere in the Pacific.”

Working on the programme has created a new direction for Visualskies, leading them to develop a ground-breaking scouting tool for the TV and film industry. Due for official release in January 2021,VSScout已被设计为一种工具套件，以帮助制作以根本沉浸式的方式探索位置，同时收集可以在各个部门使用的丰富地理数据，使所有工作人员都可以远程访问该站点。

Lees得出结论：“与世界各地令人难以置信的地方与杰出的专业人士合作，将我们的定制解决方案融入创造性过程，为所有人提供令人叹为观止的结果，这是我们的特权和荣幸。”