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Re: Adobe ACE - Photoshop 6 vs. CS
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Re: Adobe ACE - Photoshop 6 vs. CS


  • Subject: Re: Adobe ACE - Photoshop 6 vs. CS
  • From: JWL <email@hidden>
  • Date: Sun, 23 May 2004 16:45:36 -0700

> Anyone know how to show the difference between two images with something
> that will stand out like the out of gamut warning color?

-- Sure. After you change the blend mode to difference, add an adjustment
layer above the 2 layers - Levels works well. First, it will show you
immediately if there are significant differences - you'll see some
data/levels spread across the horizontal axis.

To emphasize & exaggerate the differences, first move the gray slider
(gamma) to the left, then do the same with the white point slider. If the
two layers are identical, the image will remain black, with RGB values of
zero over the whole area. But any difference in pixel values, even tiny
ones, will show up clearly with an extreme levels adjustment like this.

Hope this helps.

John





on 5/22/04 10:00 PM, email@hidden at
email@hidden wrote:

> Message: 11
> Reply-To: <email@hidden>
> From: "Craig Payne" <email@hidden>
> To: <email@hidden>
> Cc: <email@hidden>
> Subject: Adobe ACE - Photoshop 6 vs. CS
> Date: Sat, 22 May 2004 20:22:25 -0700
>
> I have checked the settings and they are identical between the two
> versions of Photoshop. Is there a good way to analytically test for the
> differences in the CMM output? I converted a test image to my printer
> profile using the two versions. Then I compared them using two layers
> and the difference blend mode. The problem is that it impossible to see
> any difference using this blend mode because the result is too dark.
> Anyone know how to show the difference between two images with something
> that will stand out like the out of gamut warning color?
>
> Thanks,
> Craig
>
>> ...<snip>...
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