Forced to convert color after scanning with TWAIN

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jens116
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Forced to convert color after scanning with TWAIN

Post by jens116 » Thu Jul 21, 2005 9:05 am

If I scan a gray-scale picture (8 bit) with TWAIN and then tell XnView to save it, a menu opens to convert the color mode of the picture - by default into 24 bit color. For me this convertion menu should not be standard because it is unnecessary. It gets on my nerves after every scan. The color mode I select with TWAIN should be the color mode I want to save the picture. If not one can convert it manually.

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Re: Forced to convert color after scanning with TWAIN

Post by xnview » Thu Jul 21, 2005 11:02 am

jens116 wrote:If I scan a gray-scale picture (8 bit) with TWAIN and then tell XnView to save it, a menu opens to convert the color mode of the picture - by default into 24 bit color. For me this convertion menu should not be standard because it is unnecessary. It gets on my nerves after every scan. The color mode I select with TWAIN should be the color mode I want to save the picture. If not one can convert it manually.
Which format do you use?
Pierre.

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Re: Forced to convert color after scanning with TWAIN

Post by Guest » Thu Jul 21, 2005 1:18 pm

xnview wrote:Which format do you use?
Sorry, I didn't mention it. The Format was JPEG.

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Re: Forced to convert color after scanning with TWAIN

Post by xnview » Thu Jul 21, 2005 2:49 pm

Anonymous wrote:
xnview wrote:Which format do you use?
Sorry, I didn't mention it. The Format was JPEG.
So perhaps normal, jpeg can only save grey or truecolors picture, and your TWAIN driver return perhaps a colormap picture...
Pierre.

jens116
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Re: Forced to convert color after scanning with TWAIN

Post by jens116 » Fri Jul 22, 2005 5:49 am

xnview wrote:So perhaps normal, jpeg can only save grey or truecolors picture, and your TWAIN driver return perhaps a colormap picture...
No, I don't think so, because after the picture is imported from TWAIN the statusbar of XnView showes 256 colors. That means that XnView knows that this is a grey picture. Besides that the convert color window opens automatically only if grey pictures were imported and not if color pictures were imported.

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Re: Forced to convert color after scanning with TWAIN

Post by xnview » Fri Jul 22, 2005 7:27 am

jens116 wrote:
xnview wrote:So perhaps normal, jpeg can only save grey or truecolors picture, and your TWAIN driver return perhaps a colormap picture...
No, I don't think so, because after the picture is imported from TWAIN the statusbar of XnView showes 256 colors. That means that XnView knows that this is a grey picture. Besides that the convert color window opens automatically only if grey pictures were imported and not if color pictures were imported.
No 256 colors means 256 colors with colormap
Pierre.

jens116
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Joined: Tue Jul 05, 2005 8:38 am

Re: Forced to convert color after scanning with TWAIN

Post by jens116 » Mon Jul 25, 2005 6:34 am

xnview wrote:No 256 colors means 256 colors with colormap
I think you are right. May be someone else in the forum has this problems with the TWAIN Epson Scan 2.56 ?

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