Re: only negative output with scanimage (Canon Canoscan 300)

Denis Prost (denis.prost@wanadoo.fr)
Fri, 21 May 1999 17:28:30 +0200

>Hi !
>
>> --negative=no, but for both of them, scanimage says :
>> "scanimage: attempted to set inactive option negative"
>> With xscanimage, I do not get this problem : I can
>> uncheck the "negative" option, and then the result of the scanning is no more
>> negative.
>
>The checking of options is sensitive to order. The error message says, that
>the option is inactive, which means it cannot be used with the _currently_
>active setup.
>
>I assume this option is only available, if you are using a transparencies
>adapter or similar, so be sure to turn the option that specifies this
>on _before_ you try to set the --negative option.
>
>CU, ANdy
>
>--
>Andreas Beck | Email : <Andreas.Beck@ggi-project.org>
>
>

Hi Andy,

Thanks for your help. In fact, I did not find any option that is available for
my scanner and that could bring the --negative option active. Here are some of
the outputs that I get when I run "scanimage -h -d canon:/dev/sgb" :

------------
Options specific to device `canon:/dev/scanner':
(...)
Scan Mode:
--mode Lineart|Halftone|Gray|Color [Color]
Selects the scan mode (e.g., lineart,monochrome, or color).
--negative Negatives|Slides [inactive]
Selects the film type, i.e. negatives or slides
(...)
Extra color adjustments:
--negative[=(yes|no)] [yes]
Swap black and white
--------------

So, the "--negative Negatives|Slides" option is inactive for my scanner, but
the --negative[=(yes|no)] should be active though, when I try it, scanimage
says that it is inactive.

I wonder if the fact that both options get the same "--negative" name does not
puzzle scanimage which then considers both of them as inactive as soon as
one of them is(would it be a bug ?). It could explain that xscanimage, which
does not work on a command line mode, works fine with the "negative" option.

By the way, to temporarily work around this problem, does anyone know a program
that can convert a negative pbm image into a positive one ?

Thanks in advance

Cheers

Denis


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