Type statement describing a specific discrete activity applied to a Media to produce a second processed derived Media or as a chain of multiple processing steps that together produce a second derived Media. Processing activities are components of Processing Events and a Processing Event may have multiple processing activities. The individual entities of this class in the MorphoSource data vocabulary comprise a controlled vocabulary used to describe the processing activity type(s) for relevant Processing Events.

Alignment in position, orientation, and/or scale of two or more surface meshes or volumes. Most often relevant to surface meshes, where a larger scan consists of multiple subregion mesh parts that are aligned, whether manually or automatically. Also applicable to CT scans, such as a scenario in which several pieces of a broken object are scanned separately and aligned to approximate the object prior to breakage. This activity can be used with activity type Merge if parts being aligned previously existed as separate files but are now combined as a single file after alignment.

Identification of object, region, and/or pixels of interest in 2D images comprising an image stack and then removing or deleting gray or color values from all regions of the image not included in the region of interest. Most often applicable to 2D image collections that are source files for photogrammetry models or volumetric reconstructed image stacks.

Converting 2D image bit depth from a higher value to a lower value (e.g., 16 bit to 8 bit).

For volumetric data, the extraction of a subregion (a region of interest or ROI) from a larger volume. For surface meshes, the act of removing parts or subregions representing noise or extraneous material from a surface mesh.

Any activity that modifies the histogram of pixel values on a 2D raster image. Includes changing contrast, modifying brightness, and processes directly applied to image histogram such as removing extreme values or changing histogram shape.

Application of a compression format or profile to data (e.g., TIFF to LZW TIFF or TIFF to JPEG for a 2D image; PLY to GLB with Draco compression for a surface mesh).

For volumetric data, repositioning and merging of multiple image stacks representing different parts of the same object into a single stack representing the combined object.For surface meshes, merging of multiple meshes or mesh fragments representing different parts of the same object. Can be accompanied by activity type Align Parts if applicable.

Addition of texture to a surface mesh or point cloud. Includes manual painting or application of photorealistic textures derived from collection of photographs via photogrammetry.

Removal of information about edges connecting point vertices in a surface mesh, converting it to a point cloud.

Filling of holes or gaps in a mesh or point cloud.

Creation of a dense point cloud from a collection of 2D image photographs with inferred positions relative to the object of interest. Usually performed after image matching has already occurred. Applicable to some but not all photogrammetry workflows.

Creation of a digital elevation model of a landscape from a collection of 2D image photographs. Applicable to some but not all photogrammetry workflows.

Generic description for creation of a 3D model from a collection of 2D image photographs by photogrammetry.

Creation of a sparse mesh and depth map by analysis of collection of 2D image photographs. Application to some but not all photogrammetry workflows. Where present in certain software packages, this precedes generation of the final 3D model.

Creation of a sparse point cloud and depth map by analysis of collection of 2D image photographs. Application to some but not all photogrammetry workflows. Where present in certain software packages, this precedes generation of the final 3D model.

Creation of a polygonal mesh from a point cloud by inferring connections among point vertices. Relevant in some photogrammetry workflows following photo matching stages.

Creation of a surface mesh from a volumetric reconstructed image stack, also known as segmentation.

Creation of a volumetric reconstructed 3D image stack from X-Ray projections and/or sinograms.

Reduction in number of vertex points or faces for a surface mesh, or reduction in number of voxels for a volume. May also produce a smoothing effect in some cases.

Reduction in noise and/or implementation of surface mesh smoothing or volumetric data filtering.

Creation of final surface mesh model from intermediate sparse mesh and depth map. Applicable to some but not all photogrammetry workflows.

Creation of dense point cloud from intermediate sparse point cloud and depth map. Applicable to some but not all photogrammetry workflows.

Transformation that inverts or mirrors coordinate values or pixel column order on an axis so that a mesh or volume appears as a mirror image of original data.

Transformation that rotates a mesh or volume around the centroid producing a rotational change on coordinates without any change in centroid position or scale.

Transformation that increases or reduces coordinate values of a mesh by a constant factor or changes the pixel spacing of a volume, modifying the absolute size of the mesh or volume.

Transformation that modifies position, changing all coordinate values of a mesh or volume along one or more axes by a constant set of modifiers, producing a translation position change in coordinate values