kopia lustrzana https://gitlab.com/sane-project/website
95 wiersze
4.2 KiB
HTML
95 wiersze
4.2 KiB
HTML
|
<!-- received="Fri Nov 26 08:07:11 1999 PST" -->
|
|||
|
|
<!-- sent="Fri, 26 Nov 1999 17:11:07 +0100" -->
|
|||
|
|
<!-- name="Manuel Panea" -->
|
|||
|
|
<!-- email="mpd@rzg.mpg.de" -->
|
|||
|
|
<!-- subject="How do I get a negative orange mask *back*?" -->
|
|||
|
|
<!-- id="" -->
|
|||
|
|
<!-- inreplyto="383C6A45.6E962DCF@wolfsburg.de" -->
|
|||
|
|
<title>sane-devel: How do I get a negative orange mask *back*?</title>
|
|||
|
|
<h1>How do I get a negative orange mask *back*?</h1>
|
|||
|
|
<b>Manuel Panea</b> (<a href="mailto:mpd@rzg.mpg.de"><i>mpd@rzg.mpg.de</i></a>)<br>
|
|||
|
|
<i>Fri, 26 Nov 1999 17:11:07 +0100</i>
|
|||
|
|
<p>
|
|||
|
|
<ul>
|
|||
|
|
<li> <b>Messages sorted by:</b> <a href="date.html#258">[ date ]</a><a href="index.html#258">[ thread ]</a><a href="subject.html#258">[ subject ]</a><a href="author.html#258">[ author ]</a>
|
|||
|
|
<!-- next="start" -->
|
|||
|
|
<li> <b>Next message:</b> <a href="0259.html">Kevin Charter: "Re: no SG__BIG_BUF in kernel 2.2.12"</a>
|
|||
|
|
<li> <b>Previous message:</b> <a href="0257.html">joakim verona: "Re: no SG__BIG_BUF in kernel 2.2.12"</a>
|
|||
|
|
<!-- nextthread="start" -->
|
|||
|
|
<!-- reply="end" -->
|
|||
|
|
</ul>
|
|||
|
|
<!-- body="start" -->
|
|||
|
|
-----BEGIN PGP SIGNED MESSAGE-----<br>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
Hi. Here is a question to the experts.<br>
|
|||
|
|
<p>
|
|||
|
|
I'm developing the Canon backend. The backend works with some Canon<br>
|
|||
|
|
flatbed scanner models and with my 35mm-film scanner model 2700F. This<br>
|
|||
|
|
model can scan negatives and slides.<br>
|
|||
|
|
<p>
|
|||
|
|
When scanning negatives, there is a SCSI command to set the scanning<br>
|
|||
|
|
speed. In this way, dark photos can be scanned at a lower speed, exposing<br>
|
|||
|
|
the film to more light so that the scanned image looks good. Alas, this<br>
|
|||
|
|
speed setting command works only for negatives, not for slides (that's<br>
|
|||
|
|
what the specs say and it's true, I've tried it). Unfortunately, the only<br>
|
|||
|
|
available and fixed scanning speed for slides is invariably too fast.<br>
|
|||
|
|
Almost all slides get scanned too dark. What to do?<br>
|
|||
|
|
<p>
|
|||
|
|
I thought I could try to outsmart the scanner and tell it to scan a<br>
|
|||
|
|
negative at a low speed when in fact I am feeding it a slide. Inverting<br>
|
|||
|
|
the colors is then an easy problem. The difficult problem is that, when<br>
|
|||
|
|
scanning negatives, the scanner automatically removes the orange color of<br>
|
|||
|
|
negative films. Slide films do not have this orange color, so if I try<br>
|
|||
|
|
this trick, the scanner gives me an image where all information about<br>
|
|||
|
|
orange-like colors is missing.<br>
|
|||
|
|
<p>
|
|||
|
|
Does anyone know of a good way to get this orange back? Just "adding" it<br>
|
|||
|
|
with e.g. the Gimp doesn't help, the image still doesn't look good. With<br>
|
|||
|
|
some other operations, specially "equalize" I can get the image to look<br>
|
|||
|
|
almost good, but not quite, and worst of all, the histogram is then "full<br>
|
|||
|
|
of holes".<br>
|
|||
|
|
<p>
|
|||
|
|
I have put on my Web-page a sample image scanned as a negative and as a<br>
|
|||
|
|
slide, in case someone wants to see the effects and maybe experiment with<br>
|
|||
|
|
the images. Find them at: <a href="http://www.rzg.mpg.de/~mpd/sane/blueslides">http://www.rzg.mpg.de/~mpd/sane/blueslides</a><br>
|
|||
|
|
<p>
|
|||
|
|
Any help would be very much appreciated.<br>
|
|||
|
|
<p>
|
|||
|
|
Manuel Panea Tel. +49 89 3299 1133<br>
|
|||
|
|
Rechenzentrum Garching Fax +49 89 3299 1301<br>
|
|||
|
|
Postfach 1533 E-mail: <a href="mailto:mpd@rzg.mpg.de">mpd@rzg.mpg.de</a><br>
|
|||
|
|
85740 Garching Germany <a href="http://www.rzg.mpg.de/~mpd">http://www.rzg.mpg.de/~mpd</a><br>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
-----BEGIN PGP SIGNATURE-----<br>
|
|||
|
|
Version: PGPfreeware 5.0i for non-commercial use<br>
|
|||
|
|
Charset: noconv<br>
|
|||
|
|
<p>
|
|||
|
|
iQCVAwUBOD6jEYnxRMteJ3RRAQE1NgP/WmnKVw/y2A5bD8Cb/AO9ydCawOOl+923<br>
|
|||
|
|
ORide+5yib6niZAz7kINBX5/XZMZ1O874S0/SR/uc5ztp8WiX71fBKv38dzENtaP<br>
|
|||
|
|
BQLAE0o/o2M0FBEanEVekmzmlcZwRq/6QrMO/NOxb5XwBZmy1AiQohLaKJYgaMvo<br>
|
|||
|
|
H3kwBqkJYs4=<br>
|
|||
|
|
=zsFv<br>
|
|||
|
|
-----END PGP SIGNATURE-----<br>
|
|||
|
|
<p>
|
|||
|
|
<p>
|
|||
|
|
<pre>
|
|||
|
|
--
|
|||
|
|
Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
|
|||
|
|
To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
|
|||
|
|
</pre>
|
|||
|
|
<!-- body="end" -->
|
|||
|
|
<p>
|
|||
|
|
<ul>
|
|||
|
|
<!-- next="start" -->
|
|||
|
|
<li> <b>Next message:</b> <a href="0259.html">Kevin Charter: "Re: no SG__BIG_BUF in kernel 2.2.12"</a>
|
|||
|
|
<li> <b>Previous message:</b> <a href="0257.html">joakim verona: "Re: no SG__BIG_BUF in kernel 2.2.12"</a>
|
|||
|
|
<!-- nextthread="start" -->
|
|||
|
|
<!-- reply="end" -->
|
|||
|
|
</ul>
|