Converting to specific palette

EC
Posted By
Edward_Cruz
Nov 15, 2006
Views
781
Replies
6
Status
Closed
How can one convert an existing 24-bit image to a 16-bit (64,000) palette?

In other words, I need to output images in 16-bit palette (max. 64,000 colors). There are automated methods to optimize to indexed palettes (256) in Image Ready. But how can I do the same for a larger palette?

Thanks!
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L
LenHewitt
Nov 15, 2006
Save as BMP and select 16Bit in the output options
EC
Edward_Cruz
Nov 15, 2006
Thanks Len. That much is known to us. But we need to define the 16-bit palette used, especially since we are creating a large collection of images, contained in a single Photoshop file.

So we need to know how to (either) define the 16-bit palette cretaed for one or a series of images, (or) set an image to a specific 16-bit palette.

thanks again!
L
LenHewitt
Nov 15, 2006
Edward,

So we need to know how to (either) define the 16-bit palette cretaed
for one or a series of images, (or) set an image to a specific 16-bit palette.<<

AFAIK there is no way of doing so in Photoshop. Colour tables only relate to indexed colour images, whereas a 16-bit BMP is still considered an 8bit/channel image by Photoshop albeit without all colours being used.
EC
Edward_Cruz
Nov 15, 2006
Thanks very much Len,

Yes, 16-bit – any 16-bit – is a derived pallette; it is interpolated. I will research to see if there is a plug-in or similar tool that can:
1. Define the exact colors used in a given image (any depth)
2. Define a 16-bit palette and apply it to an image.

If I find anything I will post it on this forum.

Thanks again!

EVC
B
Bernie
Nov 15, 2006
You may also want to research if there is a file format that will include a 16-bit colour table. If there isn’t, it’s unlikely there is a plugin to create such files.
CC
Chris_Cox
Nov 16, 2006
16 bits per pixel can only have 65535 values (64K), or 32768 values (32K) depending on the format used.
That’s not a specific palette – that’s full color, quantized to 5 or 6 bits per channel.

You don’t need any specific pallette conversion – just save.

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