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How do i convert color tiff to bw in batch using threshold
Posted: Fri Feb 06, 2009 11:31 am
by jan.smidstrup
Id like to in command line mode, convert color tiff to bw tiff , i imagine first color to greytone and the define a threshold value for which gretone should be black.
Any suggestions ?
Re: How do i convert color tiff to bw in batch using thresho
Posted: Fri Feb 06, 2009 12:42 pm
by xnview
With nconvert, you have only -binary nodither (0-127/128-255)
Re: How do i convert color tiff to bw in batch using thresho
Posted: Sun Feb 08, 2009 7:50 am
by DOS386
jan.smidstrup wrote:in command line mode, convert color tiff to bw tiff , i imagine first color to greytone and the define a threshold value for which gretone should be black.
With nconvert, you have only -binary nodither (0-127/128-255)
Any suggestions ?
You can adjust the brightness/contrast/gamma and then apply the dumb binarification. This does the job, just it's a bad hack.
So YES, adding a binarification mode with threshold is a very good idea
