Slashdot Mirror
Searching for a Decent Scanner?
Stumped about Scanners asks: "My little sister's scanner is acting up, so she's in the market for a new one. However, the software she wishes to use it with (some funkadelic 'music OCR' thing that lets you scan sheet music and transforms it automagically into MIDI files) claims that it doesn't work too well with HP scanners. And, truth be told, I've never known much about which scanners are good and which are crap. So, which scanners lately are decent? Which are crap? I know that DPI matters very little (just like it does in printers)-- it's quality that matters. Could the SlashDot community provide some info on which scanners (some from HP and some not from HP) are decent? Are there any quasi-reputable sites (a la Tom's Hardware?) that have reviews on such things?"
AFAIK the quality is top, the price correct, and it plays very nice with any OS (espacially p'n'p under linux with xsane).
aurelien
Save yourself time and money. Get a good keyboard, synth module, and a sequencer and do it that way. Scanning it to midi just doesn't ever work right.
It's either on the beat or off the beat, it's that easy.
I moderate therefore I rule!
--
If you have a digital camera, try that instead. Many digital cameras, even middle-of-the-line ones like a Powershot S400 or similar, are perfectly good replacements for document scanners, and normally much, much faster.
I'm so sad that I have to agree with this. I remember how I used to swear by HP. 10 to 15 years ago, they couldn't be beat. Then they completely changed. Everything they put out became disposable and cheap. Their inkjet printers are the strongest example of how they went wrong. I have a friend who's still using his deskjet 500, after nearly 15 years. But in the mid-90's, they started selling not printers, but disposable ink-cartridge caddies. Even the cartridges were junk. You couldn't print 1/4 of the pages advertised before they gummed up so bad they were useless. I haven't bought an HP product in years.
Another reason they aren't worth a crap is their shitty driver support. You buy an HP workstation-class machine from the late 90's early 00's, and you get no support for win98, because it's a home O/S. They only have 2K drivers. Or you buy a 'home/home office' variety from that period, and there's no Win 2K drivers. This extended to their 'internet keyboards' too, which was the last HP item I ever bought.
Then they bought up Compaq, and even their server line now has issues. Ever tried to use their mounting rails? I never thought, back in the 90's that I'd pick a Dell server over HP/Compaq and be able to make the decision merely on the basis of their racks and rails!
These people looked deep into my soul and assigned me a number based on the order in which I joined.
Although DPI matters it isn't an over riding factor in quality. This is true for scanners, printers and digital cameras. Your assertion fails because you assume that all scanned/printed/imaged pixels are equal. They are not.
A very good illustration of this is with color scanning. If you buy an expensive scanner its color accuracy should be quite good. If you buy a cheap scanner, not so much. Something that is common is getting dark blue for black.
Ah! You say, if you *really* care about the color accuracy (and who does?) then you just "apply a filter" in Photoshop. Not so fast -- if black comes in as dark blue, the question is what does dark blue come in as? if it also comes in as dark blue you just lost information and it can't be recovered.
Even if there is little information loss, "just" compressing of color space then it is something a bit beyond a simple filter. Color matching software is about the only way to deal with this problem, something Apple provides out of the box and is little used elsewhere.
My first scanner was a UMAX 1200 and with a scan target and some software I was able to create a color match profile for that scanner. The improvement in scan quality was very significant.
The short of it? It doesn't really matter if you scanner can go to 48000000 dpi if all of those "dots" are garbage. That's why getting a quality scanner is important. Scanning in a resolution higher than you will use is also a waste of time and storage, but that is another matter.
For digital cameras you get the same issues as with scanners. Ooo! Its 500 Mega Pixels! Means absolutely nothing if the reds are washed out, the blacks are blue, etc.
And printers are even more fun because people use different inks on different papers so color matching is even more hit and miss. But the original weakening of DPI as being useful to gauge printer output was when inkjet printer resolution started getting ramped up.
The problem is that the printer could place, say, 720 dots in an inch, but each dot was maybe 1/72 inch across (from memory -- at this point I don't remember the actual size of a dot on the inkjets as I don't use them). So all you got out of the 720 DPI was overly wet paper. (Well, it also allowed some smoothing of diagonals, but considering the bleeding problem with inkjets that point is of questionable value.)
Thoromyr