ijkscalarinfo - output information about a regular scalar grid

ijkscalarinfo[OPTIONS]{inputfilename}

ijkscalarinfois a program to output information about a regular scalar grid. Information includes grid dimensions, number of grid vertices, number of grid cubes, minimum and maximum scalar values, number of vertices with scalar value zero and the minimum interval between distinct scalar values. The input file should be a Nearly Raw Raster Data (nrrd) file. With the -plot option,ijkscalarinfooutputs gnuplot (.gplt) files containing frequency plots of scalar grid properties.

-plotCreate gnuplot (.gplt) files of each output measure- ment. -freqOutput frequency of grid vertex scalar values. (Default.) -isoOutput isosurface area as a function of scalar values. Isosurface area is measured as number of intersected edges/cubes. (Default.) -isoOutput volume of interval volume as a function of scalar intervals. Isosurface volume is measured as number of intersected edges/cubes. (Default.) -gradientOutput total and mean gradients as a function of scalar values. Gradients are measured as the spans of edges/cubes. (Default.) -zero_gradientOutput number of zero gradient edges as a function of scalar values. -componentsOutput number of connected components as a funcion of scalar values. -edgeOutput area/volume based on grid edges. (Default.) -cubeOutput area/volume based on grid cubes. -edge_dimOutput fractal edge dimension as a function of scalar value. The fractal edge dimension is log2(m1)-log2(m2) where m1 is the number of intersected edges in the ori- ginal grid and m2 is the number of intersected edges in a subsampled grid with subsample resolution 2. -box_dimOutput fractal box dimension as a function of scalar value. The fractal box dimension is log2(m1)-log2(m2) where m1 is the number of intersected cubes in the ori- ginal grid and m2 is the number of intersected cubes in a subsampled grid with subsample resolution 2. -edge_spanOutput frequency plots of edge span magnitudes. If min_scalar is set, only edges with some endpoint scalar value at least the minimum are included in the edge span frequencies. If max_scalar is set, only edges with some endpoint scalar value at most the maximum are included in the edge span frequencies. -cube_spanOutput frequency plots of cube span magnitudes. If min_scalar is set, only cubes with some vertex scalar value at least the minimum are included in the cube span frequencies. If max_scalar is set, only cubes with some vertex scalar value at most the maximum are included in the cube span frequencies. -min_scalarminMinimum scalar values. Used with -edge_span or -cube_span. -max_scalarmaxMaximum scalar values. Used with -edge_span or -cube_span. -laplaceCompute gradient on isosurface by summing Laplacian. -sum_from0Sum Laplacian from minimum value. -sum_to0Sum Laplacian from maximum value. -allOutput all measurements. -noneOutput no table measurements. -normalizeNormalize frequencies by dividing by total. Normalized values are between 0.0 and 1.0. -intervalIBucket interval. Must be a positive floating point number. -num_bucketsn-numbnNumber of buckets. Must be a positive integer. -ivvertex_indexOutput information about vertexvertex_index. -cc "cube_coordinates" Output information about cube with coordinatescube_coordinates. The cube coordinates must be enclosed between double apostrophes.-subsamplenCompute information for subsampled grid with subsample resolutionn. Cannot be used with -iv or -cc options.-ooutput_filenameOutput measurements to fileoutput_filename. Note: Without the -o option, each measurement is placed in a separate file.-file_labelfile_labelAddfile_labelto all file names. -helpPrint help message (and exit.)

Rephael Wenger

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