VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, 4, 5, 6, [7], 8, 9, 10 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 17:49:21 11/02/01 Fri
Author: Michel
Subject: Re: Palette bug
In reply to: Tomaz Koritnik 's message, "Palette bug" on 11:42:39 11/02/01 Fri


Hi Tomaz,

I will look into this. I know some scanners have the option to determine if 0 is black or white.

Best regards,

Michel

>Hi
>
> After I scan a BW image with TWAIN I get DIB handle.
>Then I use AssignFromDibHandle to put image into
>TTiffGraphic class. If I use this image the colors are
>all ok but if I save this image to tif file and then
>open it with TTiffgraphic I get inverted image.
> TWAIN returns palette with dib and this palette is
>inverted. In BW palette Envision uses 0 for black and
>1 for white, but TWAIN returns palette where 1 is
>black and 0 is white. By this, the theory is that
>TTiffGraphic doesn't save palette that was loaded with
>dib, or probably saves it's own palette (inverted!).
>This is a posibble explanation of inverted image as
>result. Michael: a bug?
>
> Best regards
>
> Tomaz Koritnik
> NEOSYS

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:

  • Re: Palette bug -- Michel, 18:30:31 11/06/01 Tue
    [ Contact Forum Admin ]

    Forum timezone: GMT-5
    VF Version: 3.00b, ConfDB:
    Before posting please read our privacy policy.
    VoyForums(tm) is a Free Service from Voyager Info-Systems.
    Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.