Re: [Openexr-user] Re: OpenExr >=16bit editor

[lists]

On Jul 9, 2004, at 6:44 PM, L.Yimm wrote:
> > This is the same thing that happens when you open an exposure from
> > HDRshop in Photoshop. Photoshop is simply a low dynamic range image
> > editor. The 16 bits per channel it can handle does not include any
> > greater dynamic range, only finer subdivisions of the range you 
> > already
> > have. Caveat Productor. (noticed your email domain...)
>
> I was under the impression that HDRShop saves out a temp file...so 
> that the image can be edited in Photoshop...but retains the dynamic 
> range of the original HDR.   But freely admit that I could be 
> completely wrong.....

No, you are completely right. Of course, I freely admit I could be 
wrong, too (about a lot of things).

I believe it is a temp file of one "slice" of the overall exposures in 
the HDR file. I may have alluded to that, but I tend to be obtuse.

You could, in theory, edit a temp file for each rough exposure "stop" 
of your file in HDRshop and apply the same layer (or Actions, even) of 
editing to each file and save them all back into your HDR file, but 
aside from the obvious color and intensity differences, many tools that 
rely on the "composite" image (like blurring, dodging and burning, 
etc.) would simply not work in the same way. I'm not really aware of 
another way around this aside from using the currently available tools.

I know that many transformations are available, in a form, in HDRshop 
directly, but a basic thing like cloning across mutliple slices is nigh 
impossible unless you are using an editor designed for repeated brush 
actions, or you are very patient with drawing paths to "stroke" in 
Photoshop. (I can always think of ways to do these things, but I get 
frustrated of "working around" and keep looking for another way.)

Add in the fact that I prefer to do most of my image editing on a Mac, 
and my experience using HDRshop in a workflow is even more "hiccuppy." 
So far the beta of Photogenics seems to be a good alternative for me, 
and CinePaint is a good all-arounder with only a few glitches, but in 
both cases you need a certain amount of technical savvy and 
readjustment to get into a workflow. YM(K)MV

-Mark

BTW: Most traffic on this list in 4 months!