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- .SH
- sing ALV with a Black and White Sun Workstation
- .PP
- ue to the modularity of the
- .I ALV
- oolkit, the only program which requires knowledge of whether it is
- unning on a black and white or a colour Sun workstation is
- .I dsp (1).
-
- .I Dsp (1)
- s able to decide for itself whether you are using a black and white
- orkstation. If you are, then after reading in the image
- t checks to see whether the depth of the image allows it to be
- irectly displayed. If not directly displayable and
- he image is less than 8 bits deep, then it is passed
- hrough a program to convert it to 1 bit depth. The program used is
- pecified at compile time and is normally
- .I ras8to1 (1).
- his program allows conversion of both colour and greyscale images
- sing error diffusion, dot diffusion or ordered dither together with
- ptional edge enhancement.
- .PP
- o set which options
- .I ras8to1 (1)
- s to use modify your
- .I ~/.alv_profile (5)
- ile (or the file specified in your
- .I ALV
- hell environment variable) to, say for dot diffusion with edge
- nhancement, to include the line:
- .IP
- as8to1:-d -e
- .PP
- he program used to convert to 1 bit depth can be altered by specifying
- he -8filter option to
- .I dsp (1)
- r, for a slightly more permanent change, adding or altering the
- .I dsp (1)
- ine in your
- .I ~/.alv_profile (5)
- ile.
-