Orthophoto Generation from images

Steps

1.Click on the Road Analysis >> Orthophoto >> Generate Orthophoto from Photos button in the toolbox, and the following function dialog box will appear:

Orthophoto Generation from images

2.Set the mode, orthophoto parameters, and output directory, then click "OK" to run.

Parameters

• Mode: Two generation modes are available — Tiles and Single Image.

  • Tiles: By selecting tiles and boundaries, orthophotos within the specified range are generated. First, single-image orthophotos are created, then merged into orthophotos within each tile.

    • Pick Tiles: When enabled, polygons generated by Place Tile Array or any arbitrary polygon can be selected in the 3D view. Clicking Clear will remove the selected tiles.

    • Pick Boundarise: When enabled, a polygon can be selected in the 3D view as the orthophoto boundary. Pixels outside the boundary will be set to the background color. Clicking Clear will remove the selected boundary.

  • Single Image: Generates an orthophoto for each individual photograph. Note: The maximum orthophoto range is defined by an OBB (Oriented Bounding Box) centered at the image position, extending 5 m forward and backward along the trajectory, and 3.5 m to the left and right.

    • Pick Boundarise: When enabled, a polygon can be selected in the 3D view as the orthophoto boundary. Pixels outside the boundary will be set to the background color. Clicking Clear will remove the selected boundary.

• Colorizing: Used for settings related to color assignment parameters.

  • Class: Select the point cloud categories to be used for generating orthophotos.

  • Cameras: Select the camera used for color assignment, supporting both panoramic and planar cameras.

  • Mask: Only available when Panoramic is selected in Camera, it is used for setting the mask file.

• Output Format: Set the pixel size, background color, and output file format.

  • Pixel Size: The physical size represented by a single pixel.

  • Background(Red|Green|Blue): Set the background color for the orthoimage, with a range of 0 to 255.

  • Format: Supports two photo formats: GeoTIFF and JPG.

  • Write Geotransformation: If checked, geographic coordinates and projection information will be written (directly into the GeoTIFF file, or into the corresponding world file *.jpw for JPG).

• Name: Set the file name for the output orthoimage.

  • Type: There are two options: By Order and Using Tile Number.

    • By Order: The name will adopt the format "Prefix + Sequential ID (starting from 1)".

    • Use Tile Number: The tile's numbering will be used as the file name. If the tile does not have a number, the sequential mode will be used as the file name instead.

  • Prefix: Only available when the Type is selected as By Order.

• Ouput Directory: Select the directory for generating orthophoto.