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--- dev:desktop_ext:mapping:manage:pointcloud_ortho [2023/06/15 15:10]
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-====== Process Data ======
-This page describes how to use the desktop mobile mapping administration procedures Process Data: Ortho from Panoramas, Ortho from Point Cloud and Colorize Point Cloud.
-**Content Manager**\\
-{{orbitgis:how_to_find.png?25&nolink |}} Procedures  > Mobile Mapping > Process Data
-===== Concepts ======
-The "Ortho from Panoramas" and "Ortho from Point Cloud" procedures allow the user to process a 2D orthophoto. It might be very useful as background reference and for 2D digitizing.
-There are 2 options for producing orthos:
-. From the point cloud top view ((Process Point Cloud Image is possible for all [[dev:desktop_ext:mapping:manage:runs|Orbit runs]] imported from Orbit version 10.5 or later. Orbit runs from Orbit version 10.4 or earlier cannot be used.)).
-. From the panoramas. Orthos from panoramas can only be made for the ground/floor area close to the camera positions
-The "Colorize Point Cloud" procedure allows the user to add RGB values to a point cloud using the panorama images.
-===== Ortho from Panoramas =====
-==== Preparation ====
-  - Start the process until at least one *.BMP file appears in the folder //<Orbit run>/panorama1_ortho//.
-  - Copy the *.BMP file to another folder of your choice.
-  - Cancel the process in Orbit Desktop.
-  - Drag and drop the *.BMP file into Orbit Desktop.
-  - Make two vector files and save both vector files in the folder //<Orbit run>/panorama1_ortho//:
-      - Vehicle.ovf: This polygon type vector file should consist of one polygon covering the vehicle inside the *.BMP file.
-      - VehicleAxis.ovf: This line type vector file should consist of one line representing the axis of the vehicle.
-  - Start the process using the settings of your choice. For an overview, see below.
-An example of the two vector files can be downloaded here: {{:dev:desktop_ext:mapping:manage:panorama_ortho.zip|}}
-{{:dev:desktop_ext:mapping:manage:panorama_ortho.png?nolink&400|}}
-==== Parameters ====
-{{  :dev:desktop_ext:mapping:manage:orthopanoramas_204.png?nolink&400|}}
-=== Ground reference ===
-Choose the reference to define the ground. Either a fixed ground height based on the camera height or a variable ground height based on the point cloud.
-=== Coordinate system===
-Choose the coordinate reference system of the Ortho Image that will be created. Note that these 2D orthos can only be produced in a projected coordinate system. Input data might be in any projection system (projected or geographical).\\
-=== Resolution in meter===
-Resolution defines ground sample distance of the output in meters. It can be adjusted depending on the quality of the input data. \\
-=== Radius in meter===
-Radius defines extensions of the ortho: it is measured from the camera position.
-=== Result===
-The result is an orthoimage of the panoramas, stored as an [[dev:technology:supported_formats:image:omi|Orbit Multiresolution Image]] within the Orbit Run structure (<Orbit Run directory>\panorama1_ortho\ortho.omi).\\
-==== Examples ====
-=== Mobile mapping ===
-{{:dev:desktop_ext:mapping:manage:trb_01.png?900&nolink|}}
-=== TIMMS===
-{{:dev:desktop_ext:mapping:manage:ortho_timms.jpg?900&nolink|}}
-===== Ortho from Point Cloud =====
-{{ :dev:desktop_ext:mapping:manage:orthopointcloud_204.png?nolink&400|}}
-=== Coordinate system===
-Choose the coordinate reference system of the Ortho Image that will be created. Note that these 2D orthos can only be produced in a projected coordinate system. Input data might be in any projection system (projected or geographical).
-=== Resolution in meter===
-The resolution defines the pixel resolution expressed in meters of the point cloud images. \\
-Depending on the density of your point cloud the resolution can be adjusted :
-  * 1 or 2 centimeter resolution for high-density point clouds
-  * 5 or 10 centimeter resolution for low-density point clouds
-=== Point Cloud Legend===
-A legend for the point cloud image can be set. \\
-If RGB and intensity information is available, an according image can be created. An image by fixed color or height is always possible.
-Only one point cloud image can be created for each legend type: \\
-RGB, intensity, height, fixed color. \\
-=== Result===
-The result is an orthoimage of the point cloud, stored as an OMI within the Orbit Run structure (<Orbit Run directory>\pointcloud_ortho\point_cloud_<legend>.omi). \\
-==== Examples ====
-=== Colorization by RGB===
-{{  mobile_mapping:desktop:core:manage:point_cloud_image.png?900&nolink  |}}
-=== Colorization by Intensity===
-{{  mobile_mapping:desktop:core:manage:point_cloud_image_intensity.png?900&nolink  |}}
-===== Colorize Point Cloud =====
-{{  :dev:desktop_ext:mapping:manage:colorizepointcloud_2110.png?nolink&400|}}
-=== Color by ===
-  * Position: Each point of the point cloud will be colored corresponding to the image that is spatially closest to that point.
-  * Time: Each point of the point cloud will be colored corresponding to the image that was taken closest in time to when the point was captured.
-=== Max photo ===
-Indicate how many photos are maximally used to colorize the pointcloud. Depending on the distance between the photo positions, increase or decrease this number.
-=== Mask ===
-Apply a mask on the imagery to exclude parts that shouldn't be used for colorisation. For example, parts of the vehicle. The mask can be created via the [[dev:desktop_ext:mask_creator|]] and will be automatically added to the dropdown list.
-Set the mask color after selecting a mask.

Last modified:: 2023/06/15 15:10