On Tue, Dec 06, 2005 at 07:17:43PM -0800, Carol Spears wrote:
> On Tue, Dec 06, 2005 at 03:22:41PM -0800, [EMAIL PROTECTED] wrote:
> > On Tue, Dec 06, 2005 at 02:48:57PM -0800, Carol Spears wrote:
> > > On Tue, Dec 06, 2005 at 02:21:18PM -0800, [EMAIL PROTECTED] wrote:
> > > >
> > > > I ended up with two images based on my mask, one with all black in
> > > > overexposed areas, one with all black in underexposed areas.
> > > >
> > > adding a mask should only give you transparency or not transparent
> > It is confusing to me as to *what* is transparent though, as the actual
> > image is not modified until until I paste in my black/white mask (at least
> > the way I used it, and I thought you explained it).
> well, i did not say anthing about layer mode. my idea of what you might
> have done is very confused by the introduction of this word into the
> description of what you did.
Well you explained how to apply the mask.
But yeh, I could not figure out a way to combine the resulting two masked
images with a mask. Reading gimp documentation/help about masks has not
helped so far :-(
> > > > I copied one to a new layer in the other, and selected "addition" as the
> > > > layer mode.
> > > >
> > > a layer mode is not a layer mask. the mask is an easy way to have
> > > transparency. the mode mixes the pixels of two layers mathematically.
> > So, is the best way to combine these images to use layers?
> it might be a good time to put the image online.
> after the mask introduces the transparency to one layer, the mode can be
> used to change how the remaining pixels interact with the layer below
> it. transparency occurs to one layer. you can see the layer below, but
> it is visual only. mode involves two layers. it is much more
> complicated to explain and the introduction of it here makes the
> discussion almost uselessly complicated.
> > > > I have to clean up the mask edges (they are blurred already but need
> > > > more
> > > > changes) and/or etc.
> > > >
> > > the levels tool has been useful to me for making blurry images less
> > > blurred.
> > The image is sharp, I mean I used the gaussian blur to avoid hard edges on
> > my mask.
> so are you saying that you successfully cleaned up the mask images or
> that you still need to?
I'm saying I cleaned it up some, but it might need further cleanup.
I did just did everything again (on 1/4 size images ... so I need one
another take), and cleaned out specks in the mask.
Here's an image showing the two images I started with (using the Canon raw
image, I created the two images on the left with different exposures), and
the mask I created using the threshold:
Using the above with layer masks, (plus the invert of the threshold mask),
I can create the following two (below on left and right), and then combine
these in two layers with "addition" mode to create the final image on the
The final image is not much better than the darker image I started with :-(
Anyway, it's just hard to get good photos with a snow background,
especially white-on-white of the dog and snow.
I have another image I want to try this on, even if this didn't get
-- Patrick Mansfield
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