How do i convert color tiff to bw in batch using threshold

[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 ?

[xnview]

With nconvert, you have only -binary nodither (0-127/128-255)

[DOS386]

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