Orthomosaic

Create an orthomosaic based on the digital surface model (DSM) and the images.

It allows users to change the following processing options:

• Resolution
• Algorithm
• Deghosting
• Oblique
• Exports
  • Export JPG format settings
  • Export GeoTIFF format settings

Resolution

• Resolution: Defines the spatial resolution used to generate the orthomosaic.
  • The orthomosaic resolution is the same as the resolution of the DSM. For example, if the DSM resolution is set to 5 cm then the orthomosaic resolution is also 5 cm.

Orthomosaic processing options.

Algorithm

• Algorithm: Allows switching between the orthomosaic creation algorithms.
  • Standard (Default): The generation of the orthomosaic will be computed using the standard algorithm.
  • HW accelerated : The generation of the orthomosaic will be computed using a GPU-capable algorithm. This option can contribute to reduced processing time.

Deghosting

• Deghosting (default - disabled):  Removes objects that move during the flight when generating the orthomosaic. For example, a moving car on images will not appear on the generated orthomosaic, when the Deghosting option is enabled.

Oblique

Oblique (default - disabled): Enabling this option improves the orthomosaic for oblique projects.

Exports

The following formats are available when exporting the orthomosaic:

• JPG
• Geotiff

Export JPG format settings

For the JPG format the following export settings are available:

• Quality (90% - default): Defines the compression of the exported file and the JPG quality setting.
  • 90%: The default quality value is set to 90% as it is almost indistinguishable from the quality of 100% but the image file created is twice as small.
  • 100%: A quality of 100% results in the best quality but the largest file size this means that it has low compression.
  • 0%: A quality of 0% results in a small file size but very low quality but it has the highest compression.
• Image size (L- default): Defines the size of the exported file.
  • L: Highest possible resolution that can be achieved using the JPEG format. May require more time and memory to open in some third-party software. The exported image will keep the original size unless it exceeds the maximum JPG size which is 65535 × 65535 px (~17 GB uncompressed).
  • M: High-resolution image, a good compromise for many applications that do not require the maximum number of details. The exported image will have a maximum size of 16000 × 16000 px. If the image exceeds this size, the result is to limit the maximum dimension of the image to fit the 16.000 × 16.000 px.
  • S: Standard image resolution, good for opening quickly in third-party viewers, sharing by email or on the web. The exported image will have a maximum size of 4000 × 4000 px. If the image exceeds this size, the result is to limit the maximum dimension of the image to fit the 4.000 × 4.000 px.
     

    Example: For a file with the original size of 7172 × 6117 pixels, the exported file with Image size:

    • L: 7172 × 6117 pixels (Image scale 100%).
    • M: 7172 × 6117 pixels(Image scale 100%).
    • S: 3586 × 3058 pixels (Image scale 50%).

      

      Exports menu for orthomosaic generated with L Image size in JPG format. 

      

      Exports menu for orthomosaic generated with M Image size in JPG format. 

      

      Exports menu for orthomosaic generated with S Image size in JPG format. 

Export GeoTIFF format settings

For the GeoTIFF format the following export settings are available: