Scanner differences in scanning photos
- I'm considering purchasing one of the HP scanners, and am looking
for recommendations. Is there an appreciable difference in the quality
of the image captured from the same photograph but with different
scanners (assuming the same software)?
Thanks for any advice,
- I think that most consumer scanners produce acceptable quality images given
similar image sensors and software. I would stay away from unknown
companies, several scanner companies have gone out of business or make
cheap mechanisms. These were some of the very inexpensive and "easy to use"
ones that crowded the market last year. I forget the forgettable brands.
Also, you should consider looking out for small potentially portable use
scanners, which use an LED image sensor. The reports are that these do not
produce the same level of quality as regular CCD image sensors. Some report
streaking or banding with LED sensors. I believe the small Canon uses an
LED sensor. I've seen this with a rebate as low as $50. I'd recommend this
as a lightweight unit for going to reunions and travelling, but would
suggest getting a CCD-based scanner for home use.
Look for a sturdily built unit. Open the lid and peek down into the
mechanism. If you see a lot of plastic used for the rack that moves the
image sensor, I'd look for one that has more metal in it. I can't say how
much this affects the output, but I'd prefer a well built model even if it
is a bit heavy. If it looks cheap, it probably is.
If you are looking to choose among HP scanners, you should choose based on
image quality and features. Scanners with greater optical resolution will
be more expensive, although you may not need any greater than 300 to 600
dpi *optical resolution*. Remember, that you have to process all those bits
and any time spent handling more information than you require is wasted
time. It may be more than you need for you use. And it may be too much for
your computer to handle.
Most scanners are 36bit meaning they record colors or lightness with a
greater number of levels than the older 24bit machines. This helps to
improve the performance a bit, by giving the scanner more image information
to work with. However, the extra bits are discarded when the image is sent
to your computer. It may turn out that the extra bits are within the "noise
level" of your scanner's electronics. I would not worry about the number of
bits for most images. 24bits do fine, 36bits will probably look the same. I
would not trade my solidly built but obsolete 24 bit scanner for a cheaply
built new one with more bits.
Quality of optics, optical resolution and a good solid mechanism capable of
fine stepping and a vibration free platform are the factors most likely to
affect image quality. I have prints made from box cameras that are sharper
than ones from some new 35mm point and shoot cameras. You may also see
digital cameras for $1000 with about 3 megapixels, yet professional digital
cameras without about the same number of pixels cost $6000 or more. A lot
of pixels without a good lens will not get you a better picture.
In summary, I'd say that scanners vary in
- quality of mechanism
- type of image sensor
- optical resolution
- extra features, such as built-in transparency capability
- bundled software, such as PhotoShop
A good bundle can make a good scanner purchase into a best buy. A mediocre
bundle should not decide your purchase for you.
> I'm considering purchasing one of the HP scanners, and am lookingSteve Knoblock popular history
>for recommendations. Is there an appreciable difference in the quality
>of the image captured from the same photograph but with different
editor@... of photography
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