<div dir="ltr">please, what is the difference between the two modes?</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 23, 2016 at 2:35 PM, Brian Cluff <span dir="ltr"><<a href="mailto:brian@snaptek.com" target="_blank">brian@snaptek.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Oops, use the Dodge layer mode instead of screen. You'll get better results.<span class="HOEnZb"><font color="#888888"><br>
<br>
Brian</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
On 03/23/2016 11:22 AM, Brian Cluff wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
> On 03/23/2016 04:49 AM, Michael wrote:<br>
> Thanks Brian. I am putty in your hands!<br>
<br>
I get the bounces from the PLUG mailing list, so I got your images even<br>
though they were too big for the queue... nobody else did though, so my<br>
answer will be the only one based off your image.<br>
<br>
Anyway, looking at your pictures, it appears that the darkened edges<br>
aren't due to fading over time rather they are caused by what appear to<br>
be a flash going off that lit the center of the image more than the<br>
edges. This can also be caused of lower quality lenses giving you<br>
darkened edges in what is called a vignette.<br>
<br>
If you want to try and reduce/eliminate it, in gimp you would add a<br>
layer above your picture, but before you do that, if you have the<br>
option, go to Image -> Precision and set it to 16 ot 32 bit, so that you<br>
have more color data to work with. Unfortunately you'll only have that<br>
option if you are running the development version of GIMP, but it will<br>
still work OK if you can't do that setting. Next use the gradient tool,<br>
changing the gradient type to radial, and make a gradient that goes from<br>
black in the center fading to white at the corners. (draw the gradient<br>
from the center to one of the corners).<br>
<br>
Then set your new gradient layer's mode to "screen".<br>
<br>
At this point the effect will probably be too strong, so you will need<br>
to play with the opacity till it looks better and you can also play with<br>
the color curves moving the line on the lower left back and forth across<br>
the bottom to adjust the shape of the gradient till it better matches<br>
the vignette in your image. You can change the gradients layer mode<br>
back to normal to get an idea of what the color curve adjustment is<br>
doing to the gradient.<br>
<br>
Brian Cluff<br>
<br>
On 03/22/2016 06:42 PM, Brian Cluff wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Can you send an example so that I can see what you mean by "darkened<br>
around the edges"?<br>
<br>
I'll see if I can easily correct it and then send instructions on what I<br>
did.<br>
<br>
Brian Cluff<br>
<br>
On 03/22/2016 04:18 PM, Michael wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
how does one use a transparent layer? is it only for drawing things on?<br>
I have some old pictures that have darkened around the edges. How I<br>
think I can fix it is to duplicate the layer then lighten the exposure<br>
value on the lower image, then paint black and uncover the lighter image<br>
over the section that has darkened. How do I do this with gradients and<br>
Darktable?<br>
<br>
--<br>
:-)~MIKE~(-:<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span style="font-size:12.8000001907349px">:-)~MIKE~(-:</span><br></div></div></div></div></div>
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