vfvcat − Concatenate or append VisionX feature vector format files

vfvcat [if=infile1] [ig=infile2] [of=ofile] [-a] [-v]

Vfvcat performs two operations: concatnating and appending of feature vector files. Concatnation acts in the same way as vcat, but without duplicating the header or frame markers. If it is desired to keep the frame markers, use vcat instead. The append operation joins vectors in the same positions in both input files together. In addition to joining the vectors, the header information is updated to reflect the new vectors. If the input file has frames, vfvcat will concatenate feature vectors only in frames that exist in both files. If present, vfvcat only takes the description for each vector from the first file.

For appending, vfvcat expects both files to have the same number of feature vectors to ensure consistency. The vectors in each file must have the same length. Elements can not be duplicated in both files (i.e. both files may not have an element named "age"). For concatnation, vfvcat expects both files to have the same header.

-a

The -a flag performs an append operation instead of the default of concatnate.

-v

The -v flag selects the verbose option.

if=input file 1

The input file 1 is a VisionX vector format file. For concatnation, vectors in this file will appear at the beginning of the output file. For appending, ID and class information will be taken from this file, if present. The elements of the vectors in this file will appear first.

ig=input file 2

The input file 2 is a VisionX vector format file following the constraints listed above. For concatnation, vectors in this file will be added after vectors in input file 1. For appending, the elements of the vectors in this file will be appended to the vectors in input file 1.

of=

The of= parameter specifies the output file which is a set of feature vectors containing optional id and class flags.

A. P. Reeves and A. Jirapatnakul

vclasf(1), vfvpick(1), vxltovf(1), vcat(1)