`R/cmtk-reformat.R`

`cmtk.statistics.Rd`

Calculate image statistics for a nrrd or other CMTK compatible file

cmtk.statistics( f, mask, imagetype = c("greyscale", "label"), masktype = c("label", "binary"), ..., Verbose = FALSE )

f | Path to image file (any CMTK compatible format) |
---|---|

mask | Optional path to a mask file |

imagetype | Whether image should be treated as greyscale (default) or label field. |

masktype | Whether mask should be treated as label field or binary mask (default label) |

... | Additional arguments for CMTK's |

Verbose | Whether to show cmtk status messages and be verbose about file
update checks. Sets command line |

data.frame describing results with the following columns when image
`f`

is of `imagetype='greyscale'`

(optionally with a mask):

MaskLevel (only present when using a mask) the integer value of the label field for this region

min The minimum voxel value within the current region

max The maximum voxel value within the current region

mean The mean voxel value within the current region

sdev The standard deviation of voxel values within the current region

n The count of

**all**voxel within the region (irrespective of their value)Entropy Information theoretic entropy of voxel value distribution within region

sum Sum of voxel values within the region

When image `f`

is of `imagetype='label'`

, the following results
are returned:

level The integer value of the label field for this region

count The number of voxels in this region

surface The surface area of this region

volume The volume of this region

X,Y,Z 3D coordinates of the centroid of this region

When given a label mask, returns a dataframe with a row for each level of the label field.

Note that the Entropy column (sometimes H, sometimes Entropy) will always be named Entropy in the returned dataframe.

if (FALSE) { cmtk.statistics('someneuron.nrrd', mask='neuropilregionmask.nrrd') cmtk.statistics('somelabelfield.nrrd', imagetype='label') }