BMP Deinterlacer 1.3

This is a command-line program that operates on 24-bit BMP files, and supports batch mode. BMP Deinterlacer is a small, simple and reliable command-line program that operates on 24-bit BMP files, and supports batch mode.
This has been provided in response to several requests for deinterlacing of a non-lossy format. Source code is included in the zip file.
Usage 1: bmpdeint [options] infile [outfile]
If outfile is omitted, the output will be placed in a directory called deint (created if necessary) under the current directory. The output file will have the same name as the input file.
Usage 2: bmpdeint [options] -b dir
All BMP files in the specified directory will be processed and the resulting processed BMP files will be placed in a directory called deint (created if necessary) under the current directory. The output files will have the same
names as the corresponding input files.
Note that you should never specify "*.bmp" or any other file(s) in batch mode. Specify only the source directory. To denote the current directory, use ".".
The default threshold and denoising are fine for most applications. Use the -c option to see the effects of tweaking the threshold. Areas shown in red under the -c option will be deinterlaced by interpolation; all other
areas are passed through as is.