For those of you who would like to down sample 24 bit image to 8 bit
images should take a look at a product called "FAST EDDIE" available at
http:\\www.lizardtech.com (the makers of MrSid). This shareware ($25US)
will turn a colour 24 bit image into a 8 bit image without lost of
quality thus enabling the use of your postscript driver via MapInfo
(without the dithering effect). I'm presently testing the demo version
on aerial photography and it performs 3:1 compressing and seems to
maintains image quality. I have not run a plot yet - so the assumption
that it will not dither your raster image using a postscript driver
might be premature -.
Cheers
Jacques G�linas
Geosphere Geomatique
http://www.travel-net.com/~geosphere
265 Freeman
Hull, Quebec
J8Z 2B1
tel. 819-773-4239
fax. 819-773-4263
Landis, Bill @ Phoenix wrote:
>
> This has been my pet peeve for years now. MI (30., 4.0, 4.1, 4.5,
> 5.0, &
> 5.5) will not print 24 bit color images to postscript printers. I
> don't
> care what you do to the registry it just will not do it. It resamples
> the
> images down to 8 bit using the Windows default color pallet which
> turns
> aerials into dithered garbage. I spoke with MI founder Andrew Dressel
> at
> MapWorld about it and he confirmed what I am saying. We discussed a
> solution to the problem that I hope will be included as an update or
> in the
> next version of MI.
>
> Bill Landis...
> Information Management Director, Global Mapping Services
> CB Richard Ellis
> P 602 735 5233 F 602 735 5655
> "We've got to pause and ask ourselves: How much clean air do we need?"
> - Lee
> Iacocca
>
> -----Original Message-----
> From: Brown, Christopher (HI Perth)
> [SMTP:[EMAIL PROTECTED]]
> Sent: Monday, June 14, 1999 10:05 PM
> To: mapinfo-l (E-mail)
> Subject: Sum: MI 24 bit color support
>
> Dear list,
>
> The other day I asked for info. on color support with
> raster
> images (see
> below).
>
> "Can anyone give me the "lowdown" on MapInfo V4 & V5
> support
> for 24 bit
> color
> and adjusting the registry."
>
> The main response I received was that the release of
> MapInfo
> V5.5 will
> feature
> "Support for 24-bit Color including transparency,
> brightness, contrast,
> greyscale"
>
> We are just moving to MapInfo V5.01! So being able to
> switch
> between modes
> is still an issue.
> As I mentioned in my original message.
>
> "Unfortunately the IT dept. in my company locks me out
> of
> adjusting any
> registry settings. Is there any other method to change
> these
> settings??"
>
> To fix the editing of my inaccessible registry one of
> our
> support people
> (thanks Kyle Morris) has written two (.REG) files
> which can
> change the key
> by running either one or the other.
> They are text files and contain the following :
>
> MapInfo UseTrueColor 24bit.reg (file name)
> REGEDIT4
> ;
> ; This seting allows the user to stop/start the
> MapInfo graphics
> ; engine dithering 24bit images down to 8bit
> ; the possible values are as follows :
> ; UseTrueColor=0 [dither 24bit down to
> 8bit]
> ; UseTrueColor=1 [display 24bit images
> in
> TrueColor]
> ;
> ;
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\MapInfo\MapInfo\Common]
> "UseTrueColor"=dword:00000001
>
> MapInfo UseTrueColor 8bit.reg (file name)
> REGEDIT4
> ;
> ; This seting allows the user to stop/start the
> MapInfo graphics
> ; engine dithering 24bit images down to 8bit
> ; the possible values are as follows :
> ; UseTrueColor=0 [dither 24bit down to
> 8bit]
> ; UseTrueColor=1 [display 24bit images
> in
> TrueColor]
> ;
> ;
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\MapInfo\MapInfo\Common]
> "UseTrueColor"=dword:00000000
>
> The MBX applications "colorsupport"
> http://www.mapONE.com &
> MapImagery
> http://www.gid.com do switch between 24 & 8 bit, but
> only
> when you have
> access to the registry.
>
> This now leads me to another response I have received
> and
> this is that the
> 24 bit raster does NOT work in 5.5 as stated. This has
> apparently been
> proven by on of our resellers "Desktop Mapping
> Systems" here
> in Perth.
> Can anybody comment on this?
>
> One other thing. If MapInfo has 24 bit enabled, it
> appears
> to still print
> the image dithered?
> This was tested with an aerial photograph scanned at
> 150dpi,
> 24 bit in tif
> format.
> Has anyone else found this happens?
>
> Finally thanks to those who responded to my original
> message
> :
> Rod Dawney
>
> ----------------------------------------------------------------
> AUSMEC - Australasian Mineral Exploration
> Consultants
> PO Box 183, Albert St PO, Brisbane, Queensland, 4002
> AUSTRALIA
> Phone: 61 7 32100249 Fax: 61 7 32294554
> Email: [EMAIL PROTECTED] Web:
> http://www.ausmec.gil.com.au
>
> Martin Higham
> Manager - GIS Services
> Encom Technology ph (61 3) 9428 4088
> PO Box 727, Richmond fx (61 3) 9428 0470
> VIC, 3121, Australia mobile 0414 624117
> http://www.encom.com.au
>
> Greg O'Connell
> Cartographer
> Rio Tinto Exploration Pty. Limited
> 2 Kilroe Street Milton, Qld 4064
> mailto:greg.o'[EMAIL PROTECTED]
>
> Cand.Scient.
> Lars Bagge Nielsen
> The National Museum of Denmark, DKC
> Ny Vestergade 11, Baghuset, 1. sal.
> 1471 K�benhavn K
> Tlf.: (+45) 33473088
> Fax: (+45) 33473007
> [EMAIL PROTECTED]
> Visit www.dkc.natmus.dk
>
> Regards
> Chris
>
> Chris Brown - Cartographer
> Resource Development Division, Hamersley Iron P/L
> 152-158 St. George's Terrace,
> Perth, Western Australia 6000
> GPO Box A42,
> Perth, Western Australia 6837
> Tel. +61 8 9327 2176
> Fax. +61 8 9327 2478
> mailto:[EMAIL PROTECTED]
>
>
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--
G�osph�re G�omatique
http://www.travel-net.com/~geosphere
265 Freeman
Hull, QC
J8Z 2B1
tel. 819-773-4239
fax. 819-773-4263
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