2002.09.30 22:09 "Error message with tiffcp", by Mujtaba Ali

2002.10.02 05:16 "Re: Error message with tiffcp", by Tom Lane

JPEGSetupEncode: BitsPerSample 1 not allowed for JPEG.

JPEG compression of the 1-bit image planes are not supported by the libtiff.

With good reason: JPEG is completely useless for 1-bit-per-pixel images.

You might have better luck with one of the fax-style compression methods (G3 or G4).

regards, tom lane
organizer, Independent JPEG Group