Re: Converting an RGB color back into an 16-bit-per-channel color
Re: Converting an RGB color back into an 16-bit-per-channel color
- Subject: Re: Converting an RGB color back into an 16-bit-per-channel color
- From: "Mark J. Reed" <email@hidden>
- Date: Sat, 13 Aug 2011 20:43:14 -0400
Uhm, no. 16 bits per channel is lots more information than 8 bits per
channel, and alll that extra information is lost when you convert to 8
bits. I mean, there are 65,536 different possible values of a 16-bit
number, and only 256 possible values of an 8 bit number. That means
that there are 256 different possible 16-bit values for any given
8-bit value. There's no way to tell which one of those 256 you
started out with.
On Sat, Aug 13, 2011 at 8:21 PM, Jim Thorton <email@hidden> wrote:
> Dear AppleScripters,
> Hola. I know that I can use AppleScript to open the Color Picker window.
> If the user picks a color, you will get a 16-bit-per-channel color
> like {52428, 54484, 45232}. If you want to manually convert this color into
> an 8-bit-per-channel color for an RGB color, I guess you need to divide each
> component by 256. Well, I would get RGB(204,212,176). And that's what I
> get if I select RGB Sliders from the color sliders drop-down menu. But you
> can never convert this RGB color back into what it was. If you multiple
> each component by 256, you would get {52224,54272,45056}, which differs from
> the original color.
> Is there any way to convert an RGB color back into the
> original 16-bit-per-channel color?
> Thank you for your advice.
> Jim
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--
Mark J. Reed <email@hidden>
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