Re: Apple II Reference Manual Addendum PDF now online

["Craig Bower" <to.email.me@post.a.request.message>]

"Paul Schlyter" <pausch@NOSPAMsaaf.se> wrote in message 
MPG.1d2a715abb76dea39896cc@news.individual.net">news:MPG.1d2a715abb76dea39896cc@news.individual.net...
>
> Yes: never store the images as JPG when small detail is
> important.  Instead choose a file format with non-destructive
> compression, such as GIF, PNG or TIFF.  To cut down the size
> of the image file as much as possible, instead try to minimize
> the number of colors in the image.  These images are frequently
> black-and-white, so scan them in as such - or convert the image
> after the scan from "color" to "greyscale".  Next, cut down the
> number of grey levels as much as possible.  16 grey levels usually
> works fine here (each pixel will then only occupy 4 bits of data
> in uncompressed form).  Even just 2 grey levels may work (i.e. just black
> and white, no shades of gray) - if so, the size of the image is really
> minimized, since each pixel will then occupy only one single bit in
> uncompressed form.  A 2 gray level b&w image, saved as a GIF file, can
> be considerably smaller than a JPG file at the same resolution - this
> may allow you to scan the image at still higher resolution, without
> the GIF file getting larger than the JPG file at the original resolution.

Hi Paul,

I gave 'er a go, and really minimized a lot of the filesizes accordingly!

Thank you for the pointers! - I'm currently going with 4-bit color,
greyscale where no color exists.  And the filesizes are incredibly
smaller, yet still look decent enough to be readable!  - The Graphics
Tablet manual came down in size from 17 odd MB to about 6 MB
just by converting to GIF, greyscale, 4 bpp!

Thanks again,
Craig