Re: Image resample effect on color
Re: Image resample effect on color
- Subject: Re: Image resample effect on color
- From: email@hidden
- Date: Tue, 14 Oct 2003 17:20:48 EDT
In a message dated 10/14/03 5:02:47 PM, email@hidden writes:
>
When resizing an image in Photoshop, what effect do the different resample
>
image modes (Nearest Neighbor, Bicubic & bilinear) have on an images color,
>
if any?
>
Nearest Neighbor is always used with color targets or spot colors to keep
from softening the edges. But for photographic images there are no fixed color
values, only single pixel values that relate in varying ways to adjacent pixel
values. If you resample such an image down, you can keep some of the values and
throw others away, or attempt to be smarter about the gradients involved with
bicubic methods. With upsampling, you can duplicate values for the new
pixels, or attempt to interpolate between them more smoothly with bicubic. Since
there are no fixed colors involved, either solution may be more satisfactory for
one image or another, though bicubic is generally more photographicly
realistic than nearest neighbor.
C. David Tobie
email@hidden
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