OpenEuphoria

Re: 24 to 16 bit conversion

• Posted by DB James <larches at comcast.net> May 13, 2007
• 621 views

Pete Lomax wrote:
> 
> I have a 690K 24-bit bmp file, which I saved using MSpaint as a 16-bit bmp
> file,
> which reduced it to 116K, a shade under 6 times smaller. Again using MSpaint,
> I saved it as a gif, now just a mere 14K, another factor of over 8, resulting
> in some *49 times* smaller than the original. Me want that!
> While the 14K gif is only a minor shade difference from the 116K 16-bit bmp,
> the same is clearly far from true of the 24- and 16- bit bmps.
> 
> Examples I speak of are:
> <a
> href="http://palacebuilders.pwp.blueyonder.co.uk/edita24.bmp">http://palacebuilders.pwp.blueyonder.co.uk/edita24.bmp</a>
> (690K)
> <a
> href="http://palacebuilders.pwp.blueyonder.co.uk/edita16.bmp">http://palacebuilders.pwp.blueyonder.co.uk/edita16.bmp</a>
> (116K)
> <a
> href="http://palacebuilders.pwp.blueyonder.co.uk/edita.gif">http://palacebuilders.pwp.blueyonder.co.uk/edita.gif</a>
> (14K)
> 
> So, it seems to me I have a fine tool for 16-bit bmp->gif, what I need is
> a much better tool for 24-bit to 16-bit bmp.
> 
> Now I may have used too many colours in:
> <a
> href="http://palacebuilders.pwp.blueyonder.co.uk/eatools.bmp">http://palacebuilders.pwp.blueyonder.co.uk/eatools.bmp</a>
> (18K)
> <a
> href="http://palacebuilders.pwp.blueyonder.co.uk/eclrs.bmp">http://palacebuilders.pwp.blueyonder.co.uk/eclrs.bmp</a>
> (660K)
> 
> which I doubt, otherwise I cannot imagine things won't "fit" in 16-bits.
> 
> Any thoughts/ideas/code I can use?
> 
> Regards,
> Pete

Hi Pete,

Not sure exactly what you are thinking of (don't understand the need to jump
from 24 to 16-bit), but as far as a free way to manipulate images goes, it
is hard to beat IrfanView.  If the idea is to end up with a clear small GIF
image, then it is simple to do.  I'll send you an email of one of your
images that is reduced to 20 K as a GIF instead of the original 661 K.

The IrfanView url: http://www.irfanview.com/

--Quark