Edit Image

This function allows you to modify the internal and external parameters of an image.

Requirements

Select one or several images before entering the command.

Notes

While it is possible to select several images before entering the command, only their image type and their internal parameters will be editable. The edited parameters will be applied to all the selected images.

Editing several images using different projections methods at the same time is not possible.

The content of the command will vary according to the image type.

Perspective image

Image type dropdown menu allows you to manually change the projection type of the image. Modifying the image type may result in the loss of one or several internal parameters.
Camera External Parameters let you modify the pose (position and orientation) of the selected image.
Camera Internal Parameters
Internal parameters represent the internal configuration of the camera used to capture the image point.
These values can be obtained using the Calibrate Camera command.
- General configuration
  - Sensor size: Width (S_W) and Height (S_H) of the camera sensor (usually in mm)
  - PPA: Principal point of auto-collimation relative to the sensor center (usually in mm)
  - PPS: Principal point of symmetry relative to the PPA (usually in mm, and usually equal to 0)
  - Focal length (f): Focal distance (usually in mm)
- Lens distortion
  - k₀ to k_6: Radial distortion coefficients
  - p₁ and p₂: Tangential distortion coefficients

Valid camera internal parameters

When loading camera internal parameters in the command, a check is done to ensure that the parameters match the current image definition. It means the following assertion must be satisfied:

Image Width = Sensor Width x pixel size
Image Height = Sensor Height x pixel size

Spherical Image

Image type dropdown menu allows you to manually change the projection type of the image. Modifying the image type may result in the loss of one or several internal parameters.
Camera External Parameters let you modify the pose (position and orientation) of the selected image.

Orthoimage

Image type dropdown menu allows you to manually change the projection type of the image. Modifying the image type may result in the loss of one or several internal parameters.
Define the current image resolution in length unit per pixel. Insertion Point
- The position of the upper left corner of the orthoimage in world coordinates system.
Rotation
- The rotation to apply around the Insertion Point between the image X and Y axes and the world X and Y axes
Pixel size

Technical information

Refer to the Image management | Images-rotation-and-standards section for additional information about the different image standards.