[comp.sys.mac] Printing Gray scale picture on LaserWriter?

ksuzuki@caen.engin.umich.edu (KATSUYUKI SUZUKI ) (05/31/90)

Hi, everyone. I have question about printing grey scale picture on Laser
Printer. I have gray scale PICT format picture,(it is density plot) and 
I pasted that file to MS Word 4.0, and printed to Laser Writer, since
Laser Printer can print gray scale. It looked fine on the monitor, but
when it was printed,the picture looked so awful. 

Does anybody know how to escape from this problem? I prefer to use
MS Word 4.0 to print, but if MS Word cannot do this and other word
processing or DTP program can do this, I don't mind buying one. Also,
I know that MS Word support Post Script type of picture which you can
option-copy and paste into MS Word, but this is not what I want. (Since
picture is complicated, PostScript data is so huge, and scroll on
MS Word becomes unbearably slow.

Either post or e-mail is fine. I will forward answers I receive if you
are interested. Thanks in advance.

Katsu Suzuki
      University of Michigan, Department of Aerospace Engineering

news@haddock.ima.isc.com (overhead) (06/01/90)

In article <2452@zipeecs.umich.edu> ksuzuki@caen.engin.umich.edu (KATSUYUKI SUZUKI ) writes:
>Hi, everyone. I have question about printing grey scale picture on Laser
>Printer. I have gray scale PICT format picture,(it is density plot) and 
>I pasted that file to MS Word 4.0, and printed to Laser Writer, since
>Laser Printer can print gray scale. It looked fine on the monitor, but
>when it was printed,the picture looked so awful. 

I have Word, and Digital Darkroom.  If you import the PICT in
Digital Darkroom, export it as a halftone'd TIFF, you can read
that in with Word.  Canvas 2.0, 2.1 also have a halftoning
feature, though without anywhere near as much flexability.  You
can cut & paste.  Canvas is also convenient for changing the
resolution of an image.  Say it was 300 dpi (you just halftoned
it), you can tell it that it is now 150 dpi (twice as big).  I
don't know of a word processor that will do halftoning (though I
haven't looked).

Cheapcolor was posted to the net recently (last six months).  It
can also halftone for you.  It will produce a 75 dpi halftone
(rather than 300 dpi as with Canvas or Digital Darkroom).  It is
designed for color printing on an imagewriter, but I used it to
print on my laser printer.  I don't recall if it has export
capability.  I think so.

If you are going to be doing much multi-bit-per-pixel stuff on
your Mac, I'd get Digital Darkroom.

Stephen.
suitti@ima.ima.isc.com

thwang@cory.Berkeley.EDU (HWANG TSONG-WEN) (06/04/90)

In article <16756@haddock.ima.isc.com> suitti@anchovy.UUCP (Stephen Uitti) writes:
>If you are going to be doing much multi-bit-per-pixel stuff on
>your Mac, I'd get Digital Darkroom.
>
>Stephen.
>suitti@ima.ima.isc.com

I dunno.  Look for a program called Enhance from MicroFrontiers.  It's
harder to find since it only started shipping recently.  On the other
hand, it's _much_ faster and has a generally more flexible control set.
Also, it works with (read: requires) 32-bit Quickdraw; Digital Darkroom
produces pictures with compressed grayscale under 32-bit Quickdraw.
Last but not least, it supports compressed TIFF files -- a big space
saver.

There's a review of it in, I think, the March 1990 MacWorld.

John Yen   csdq122@emx.cc.utexas.edu

Leo.Bores@f14.n114.z1.fidonet.org (Leo Bores) (06/06/90)

In an article of <30 May 90 18:43:49 GMT>, ksuzuki@caen.engin.umich.edu 
(KATSUYUKI SUZUKI ) writes:

 KS>Hi, everyone. I have question about printing grey scale picture on 
 KS>Laser
 KS>Printer. I have gray scale PICT format picture,(it is density plot) and 
 KS>
 KS>I pasted that file to MS Word 4.0, and printed to Laser Writer, since
 KS>Laser Printer can print gray scale. It looked fine on the monitor, but
 KS>when it was printed,the picture looked so awful. 

It is doubtful that you will be able to obtain what you are looking for on a 
300 dpi printer. Output MIGHT be better on some of the newer printers that use 
dots with variable pitch. We've had the same problem and with Half-Tones. To 
get the appearance you want - you may have to have it printed out on Varityper 
or Lino with at lesat 1200 dpi.

Leo Bores, M.D.





--  
Uucp: ...{gatech,ames,rutgers}!ncar!asuvax!stjhmc!14!Leo.Bores
Internet: Leo.Bores@f14.n114.z1.fidonet.org

MM93ECOF@MIAMIU.BITNET (06/06/90)

The Laserwriter print driver may also affect quality.  The 6.0 driver
gives better grayscale output.  I got it on a disk from the Apple Rep
as part of the 32 bit QD files.

news@haddock.ima.isc.com (overhead) (06/06/90)

In article <19845.266C6141@stjhmc.fidonet.org> Leo.Bores@f14.n114.z1.fidonet.org (Leo Bores) writes:
>In an article of <30 May 90 18:43:49 GMT>, ksuzuki@caen.engin.umich.edu 
>(KATSUYUKI SUZUKI ) writes:
> KS>Hi, everyone. I have question about printing grey scale picture on 
> KS>Laser
> KS>Printer. I have gray scale PICT format picture,(it is density plot) and 
> KS>
> KS>I pasted that file to MS Word 4.0, and printed to Laser Writer, since
> KS>Laser Printer can print gray scale. It looked fine on the monitor, but
> KS>when it was printed,the picture looked so awful. 
>
LB>It is doubtful that you will be able to obtain what you are looking
LB>for on a 300 dpi printer.
[stuff about using a variable pitch printer...]

I posted about using Digital Darkroom before.  Yes, it is true
that a 300 DPI printer isn't going to get you photo quality.
Yes, it is true that a Linotronics 1200 DPI or better printer
will be better (magazine picture quality).  Without knowing what
you need, I've no idea if it will do it for you.  In Boston, you
can bring a disk to a self-serve shop and use their
phototypesetter for something like $10/page.  I did this for a
business card master once.

I think of halftoning this way: take a grey pixel, create a 4 x 4
dot matrix to correspond to it (you get 17 greys, white, and one
grey for each additional dot.  Avoid patterns with neighbors by
rearranging dots).

I've done several 8 1/2 x 11 newsletters.  I scan stuff at 75
dpi, 32 grays (Thunderscan), then halftone them.  This is enough
information for a 300 dpi halftone (it basically gives you 75 dpi
with 17 grays).  Sometimes I'll print the pictures at 150 dpi
(double size) so that it photocopies better.  Yes, this is only
(roughly) 38 DPI, 17 grays.  This is often "enough".

Other stuff I've done is 300 dpi halftones, 8 x 10 inches.
Basically full page.  It can look pretty good.  There are
enough dots.

Digital Darkroom gives you contrast, brightness, clipping, and
scaling options to allow you get the most out of a picture.  All
the painting, splicing, and effects are real nice, too.

Disclaimer, I don't work for Silicon Beach... I'm just a happy user.

Stephen.
suitti@ima.ima.isc.com

Nothing is better than sex.
Masturbation is better than nothing.
Therefore, masturbation is better than sex.

philip@Pescadero.Stanford.EDU (Philip Machanick) (06/07/90)

In article <19845.266C6141@stjhmc.fidonet.org>, Leo.Bores@f14.n114.z1.fidonet.org (Leo Bores) writes:
> In an article of <30 May 90 18:43:49 GMT>, ksuzuki@caen.engin.umich.edu 
> (KATSUYUKI SUZUKI ) writes:

> 
>  KS>Hi, everyone. I have question about printing grey scale picture on 
>  KS>Laser
>  KS>Printer. I have gray scale PICT format picture,(it is density plot) and 
>  KS>
>  KS>I pasted that file to MS Word 4.0, and printed to Laser Writer, since
>  KS>Laser Printer can print gray scale. It looked fine on the monitor, but
>  KS>when it was printed,the picture looked so awful. 
> 
> It is doubtful that you will be able to obtain what you are looking for on a 
> 300 dpi printer. Output MIGHT be better on some of the newer printers
that use 
> dots with variable pitch. We've had the same problem and with Half-Tones. To 
> get the appearance you want - you may have to have it printed out on
Varityper 
> or Lino with at lesat 1200 dpi.

Correction - a laser printer DOESN'T print gray scale strictly speaking. It
uses halftones to simulate grey scales. Your screen can vary the brightness
of a dot (pixel); your printer can't - it simulates the effect by changing
the number of dots it prints. This is why you need so much more resolution
for a printer for gray scale (and for that matter color) rendition.

Philip Machanick
philip@pescadero.stanford.edu