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- Date: Sat, 19 Oct 85 14:16:55 edt
- From: mtu!russell@glacier (Russell Reid)
- To: glacier!"INFO-MAC@SUMEX"@glacier
- Subject: ThunderScan software... WOW!
- Cc: glacier!"adobe!greid"@glacier, glacier!reid@glacier
-
- ThunderWare just sent me the software update for my ThunderScan, a
- digitizer for the Mac that works by snapping an optical scanner into the
- ImageWriter in place of the ribbon cartridge. You then can scan anything
- that you can fit through your ImageWriter. With photographs and
- photocopies everywhere, that means nearly anything.
-
- The potential for something like ThunderScan is obvious. Whether it
- fulfills its potential depends on lots of gritty details. It seems like a
- lot of Mac software has problems there: MacPascal is slow and has serious
- size limitations, MacPaint is hobbled by screen resolution, MacDraw can't
- do subscripting (important for scientific stuff) and gets too slow to be
- useful if graphics get complex.
-
- I found the first version of ThunderScan to have the classic Mac blues..
- it was a splendid thought, but I just could never seem to settle down and
- get serious use out of it. I am happy.. no, overjoyed, thrilled! .. to
- report that the update software is beyond my wildest dreams. It is, to use
- a sober, reliable appropriate-for-a-review sort of word, WONDERFUL!
-
- ThunderScan records 32 levels of gray at any of a wide range of sizes, from
- 400% magnification to (I think) 25% reduction. Before, during or after
- scanning, you can mess with "halftoning", i.e. the mimicing of levels of
- gray by dots. In the first version of the software, you could adjust the
- brightness and contrast, and also something having to do with the range of
- grays that I never completely understood. I found the controls to be
- inadequate, (so too was my understanding of what was going on), and it
- typically took a long time for me to get an image I liked. Often I just
- couldn't get it right.
-
- The update fixes these problems, and does it so cleanly and well that it
- opens up whole new horizons. (gee, I really have to whack the "s" on this
- terminal to make it go...) The new software allows you, among other
- things, to draw any curve you want as an input-output gray map. That means
- you can decide which incoming shades of gray print as which outgoing shades
- in virtually any way that you want. You can take an image with a lot of
- very dark shades of gray and spread them out, or one with a lot of soft
- grays and add contrast, or whatever. The "or whatever" includes possibili-
- ties that never occurred to me until I read the new ThunderScan manual.
- (you can cause whites to print as blacks, and the reverse, or cause SOME
- shades of gray to print as black or white, or other shades of gray, or
- *anything you want*.
-
- The new manual is, in a word, terrific. From the first version, I never
- even understood what contrast is, in any fundamental sense. I now under-
- stand it completely, and a lot more besides, and because of that understan-
- ding I can really DO THINGS that I want to do. That is a lot to get from
- software documentation--I am usually grateful if the stuff can at least
- refrain from confusing me thoroughly on points that should be obvious.
-
- Another enormous plus, if you have access to somebody's LaserWriter, is the
- ability to print the scans in all sorts of sizes and resolutions, with the
- 300 dot-per-inch laserWritings being little short of breathtaking.
-
- I heartily recommend ThunderScan. I am not sure I could have said that
- about version 1, but I can about version 2. Its value increases by a
- factor of 5 if you have access to a LaserWriter. It also requires some
- learning, as most good tools do.
-
- One final word. Mathematicians have a word for solutions whose grace and
- insight set them a step above the problem they set out to solve. They are
- "elegant" solutions, something to be valued in their own right. The
- reaction I got to working with the gray-scan map in ThunderScan is just
- that: gentlemen, this shows a hell of a lot of class. My hat is off to
- you guys.
-
- A not-quite-usual disclaimer: I have absolutely no specific interest in
- ThunderWare, except that I plan to do absolutely wonderful things with
- their scanner. But I have an enormous interest in seeing this kind of
- thing become a standard for the Mac in general: it is reasonably priced
- (considering it includes hardware, too), splendidly documented, and it does
- the job so well that I can't even think of something I wish it did.
-
- Wow.
-
- Russell Reid
- Michigan Tech University
-