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