Re: [Gimp-developer] Layer modes: Add vivid light blend mode?

2017-01-23 Thread Ell via gimp-developer-list
On 01/23/2017 06:58 AM, Laxminarayan Kamath wrote: Hi all! While you guys are at it, I encourage you to try out this formula: E = (2 * I ) - M Note that the recent work in master removed the channel-value clamping that used to happen during blending (yay! :), and since each layer appears

Re: [Gimp-developer] Layer modes: Add vivid light blend mode?

2017-01-23 Thread Laxminarayan Kamath
On 1/23/17, Øyvind Kolås wrote: > This is similar to something else I have experimented with, permitting > opacity values below 0% and above 100% for normal mode, this permits > implementing unsharp mask with a blur layer - as well as increasing > saturation by blending a color

Re: [Gimp-developer] Layer modes: Add vivid light blend mode?

2017-01-23 Thread Laxminarayan Kamath
On second reading, the previous description is not that clear on how to use it. (unless you have read the unsharp mask script) You have an image with a slight radial or zoom blur or motion blur (the photographer tried to be creative) . You duplicate the layer. You measure and run the same exact

Re: [Gimp-developer] Layer modes: Add vivid light blend mode?

2017-01-23 Thread Øyvind Kolås
On Mon, Jan 23, 2017 at 12:58 PM, Laxminarayan Kamath wrote: > Hi all! > > While you guys are at it, I encourage you to try out this formula: > > E = (2 * I ) - M > > I call it the "Opposite" mode. I derived it from how the unsharp mask > does the sharpening - first run a

Re: [Gimp-developer] Layer modes: Add vivid light blend mode?

2017-01-23 Thread Laxminarayan Kamath
Hi all! While you guys are at it, I encourage you to try out this formula: E = (2 * I ) - M I call it the "Opposite" mode. I derived it from how the unsharp mask does the sharpening - first run a grain extract and then do a grain merge. It is not useful in an awful lot of places. But when you