Leica RTC360增强功能以​​提高您的效率

The Leica RTC360 3D laser scanner combines high-speed scanning and image data acquisition, powered by a truly unique Visual Inertial System (VIS Technology) that’s easy to use for all experience levels. With Leica Cyclone FIELD 360 field application and Leica Cyclone REGISTER 360 office software, the 3D reality capture solution is one of a kind. Since the release of the RTC360 in 2018, continuous enhancements have been regularly released to refine the user experience further.

下面我们分享了最近的固件版本4.0和5.0的两个显着增强功能：

1. 数据尺寸减少和自适应图像分辨率

3D激光扫描仪和成像激光扫描仪在短时间内收集大量空间数据。此收集的数据临时记录在USB存储设备上，以用于最终导入和后处理，例如Cyclone寄存器360。如果您整天在现场工作，以许多设置为一个复杂的项目，例如USB存储设备上的数据大小将很重要，并且可能使数据处理复杂化。

使用RTC360固件v4.0，专注于改进数据处理是基本的。我们引入了一个新的自适应图像分辨率功能，该功能大大降低了成像数据的大小。为了实现一般数据尺寸的减少，开发了新的扫描数据格式和新的图像压缩算法。这种新的格式和压缩算法减少了数据的大小，并确保扫描和图像数据的质量保持较高。

扫描数据格式

以下图表中表示，扫描数据大小的减小。它显示了每次设置的兆字节的数据大小，而无需图像，对于自市场上最初发行以来就已经发生的各种RTC360固件版本的所有三个扫描分辨率。

正如您在固件2.0版中看到的那样，我们将设置数据大小从固件版本1.50中的初始数据大小减少了约70％。随着固件版本4.0的发布，与2.0版相比，数据大小约为35％。与2018年RTC360的原始版本相比，使用固件4.0或新版本收集的设置仅使用20％的数据存储。

Image Compression

此外，在固件4.0版中，通过引入新的图像压缩算法来减少数据大小。下图显示，与固件2.0版相比，固件4.0版的数据大小将超过30％的数据大小减少。与2018年固件版本1.5的原始版本相比，包含固件版本4.0或更新的扫描和图像数据的设置不到20％的数据存储。

Adaptive Image Resolution

To save time when importing scan data into post-processing office software, the RTC360 can be programmed to cleverly remove redundant imaging data by simply enabling the Adaptive Image Resolution feature. By default, the RTC360 collects images in full resolution (4000 x 3000 pixels) independently from scan resolution. The RTC360 automatically adjusts its imaging resolution to suit the desired scan resolution by enabling the Adaptive Image Resolution feature. This means that raw images are down sampled for low and medium resolution scans so that each measured 3D point has its corresponding pixel in imaging data. Resolution of images taken with a medium scan resolution is set to 2000x1500 pixels and for low scan, resolution is set to 1000 x 750 pixels. By selecting these resolutions, point cloud colour information is not lost, as shown in Figure 1 below.

图1：针对所有扫描分辨率（从上到下从上到下）的强度值（左侧）和真实颜色（右侧）颜色的点云的比较，并启用了自适应图像分辨率。

毫无疑问，新的扫描和图像数据格式大大减少了数据大小，并使用户放心地，数据处理更好而不会损害最终数据质量。

对于许多主要可交付的项目是颜色的点云，强烈建议启用自适应图像分辨率功能，因为它最佳地降低了设置数据大小 - 中等分辨率扫描为10％，而低分辨率扫描的设置为70％功能禁用。进口时间用于后处理办公软件，最多可提高60％。要读取和处理的数据较少，减少数据传输时间，并比以前更快地产生“最终可交付的字段”。

储存设备

When users are in the field all day and need to complete many setups, they need one storage device that contains all data from their laser scanner. The USB storage device provided with the RTC360 can easily manage all data from a vast number of setups. However, with firmware version 4.0, we enhanced the USB storage device even more. It can store five times more scan setups and setups with imaging compared to the original firmware available at release. If the Adaptive Image Resolution feature is enabled, it can store 18 times more setups. The graph below shows the maximum number of setups stored on the RTC360 storage device per firmware release over the last three years.

随着数据大小通过使用较小的空间进行优化，数据传输时间也是如此。传输数据所需的时间更少。因此，在永久存储设备上存档数据更便宜，因为用户无需在硬件或云数据存储解决方案上花费更多的钱。

2. 高倾斜精度

When the RTC360 was first introduced into the market, the tilt accuracy was specified at 3’ or 180’’ for any tilt of the laser scanner. This solution prevented the need for customers to level the scanner for each setup, however for some specific applications like levelness of a floor or slab, or the verticality or horizontality of an object, the tilt accuracy did not meet requirements. For this reason, an additional focus for levelling the RTC360 on a tribrach or setting-up targets in the field and measuring them with a total station to define the levelled reference for later registration in the office software was a necessity.

Firmware version 5.0, therefore, released a new High Tilt Accuracy feature which significantly improved the tilt accuracy of the RTC360 laser scanner by a factor of 10. With the High Tilt Accuracy feature enabled, tilt accuracy is 18’’ in a working range of ± 5° for the laser scanner’s upright and upside-down orientation. For any greater tilt of the laser scanner or if the High Tilt Accuracy feature is disabled, the previous 3’ tilt accuracy continues to be valid.

图2：设置屏幕上的高倾斜精度功能。

为了通过现有的IMU传感器实现新的高倾斜精度，我们的工程师开发了一种用于处理IMU数据的全新算法，该算法在RTC360激光扫描仪的方位角旋转360°旋转时收集。为了达到高倾斜度的精度，使用从最后一个已知的GNSS位置得出的局部重力加速度用于计算倾斜度。

新的高倾斜精度18'’确保点云比以前更准确10倍，从而使用户无需付出额外的努力执行现场任务。启用了高倾斜度的精度，地板或平板的水平，可以检查物体的垂直或水平性，而误差小于1.7 mm @ 20 m或3.5 mm @ 40 m，满足典型激光扫描的要求工作。

图3：在给定距离处具有18''''''''的最大水平/垂直误差。

为了确保您的RTC360的最佳扫描和图像数据质量和倾斜精度，请下载最新的固件版本，可从Leica GeoSystems下载。我的世界customer portal.

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