new filter "WhiteBalanceStretch2"

dinasset · **Posted:** Tue Dec 20, 2016 1:35 am **(#21)**

iarga, for your morning tests I send you this version.

Attachment:

DIEGO_WhiteBalanceStretch2-R.zip [3.89 KiB]
Downloaded 83 times

my two tests:

Attachment:

lena_20dec.jpg [ 145.91 KiB | Viewed 1319 times ]

Attachment:

original%20orange_20dec.png [ 927.42 KiB | Viewed 1319 times ]

dinasset · **Posted:** Tue Dec 20, 2016 1:44 am **(#22)**

PS: it would be nice for me to get an overall evaluation between the results you got using original filter and those you get using this modified version.
In other words: assuming you made your tests on 20 images, which one gives overall better results in more than 10 images.
An auto adjusting procedure can't be applied totally successfully to every and each case, it's good -and I'm happy- if it works fine in the majority of cases.
(it is the same also for my other filters...).
Thanks again for your support.

iarga · **Posted:** Tue Dec 20, 2016 1:55 am **(#23)**

Hello Dinasset, later this day, I will have a look.

dinasset · **Posted:** Tue Dec 20, 2016 4:54 am **(#24)**

I googled to find some color-casted images and I did apply my filter (last version)
this carrousel can show how sometimes results are good sometimes not

original

Attachment:

color-cast-4.jpg [ 74.12 KiB | Viewed 1304 times ]

after applying the filter

Attachment:

color-cast-4 auto white balanced.jpg [ 168.95 KiB | Viewed 1304 times ]

dinasset · **Posted:** Tue Dec 20, 2016 4:57 am **(#25)**

before

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color-cast-9um4b6.jpg [ 77.24 KiB | Viewed 1303 times ]

after

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color-cast-9um4b6 auto white balanced.jpg [ 115.51 KiB | Viewed 1303 times ]

dinasset · **Posted:** Tue Dec 20, 2016 4:58 am **(#26)**

before

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color-cast-28.jpg [ 151.46 KiB | Viewed 1303 times ]

after

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color-cast-28 auto white balanced.jpg [ 229.78 KiB | Viewed 1303 times ]

dinasset · **Posted:** Tue Dec 20, 2016 4:59 am **(#27)**

before

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color-cast-original1.jpg [ 75.11 KiB | Viewed 1302 times ]

after

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color-cast-original1 auto white balanced.jpg [ 108.91 KiB | Viewed 1302 times ]

josephbupe · **Posted:** Tue Dec 20, 2016 7:21 am **(#28)**

Interesting plugin. I couldn't even get the same results with the curves tool.

Is there supposed to be a dialog when I select the menu?

dinasset · **Posted:** Tue Dec 20, 2016 8:14 am **(#29)**

Joseph,
this is the dialogue: only a single parameter, to set a post-processing enhancement step or not

Attachment:

CatturaWhiteBalanceStretch2.PNG [ 449.9 KiB | Viewed 1293 times ]

josephbupe · **Posted:** Tue Dec 20, 2016 8:33 am **(#30)**

Thanx. I will try again, i didn't see the menu first time I installed the plugin. I probably mistook it for the GIMP's native White balance script under colors/Auto.

Cheers.

dinasset · **Posted:** Tue Dec 20, 2016 9:43 am **(#31)**

Joseph,
my filter is located at Diego/Ancillary/Colours/WhiteBalanceStretch2

dinasset · **Posted:** Tue Dec 20, 2016 2:20 pm **(#32)**

#iarga (and any other chatter who wants to do tests)
I guess I went a bit step further in attaining in general a better outcome

You may try this "evening" version

Attachment:

DIEGO_WhiteBalanceStretch2C.zip [4.02 KiB]
Downloaded 109 times

I hope to have reached a quite good assessment, so that I can release it officially as an update of the one published yesterday, let me know whether you agree.

Issabella · **Posted:** Tue Dec 20, 2016 4:11 pm **(#33)**

I find great improvement with your last version, Dinasset.

Issabella · **Posted:** Tue Dec 20, 2016 4:12 pm **(#34)**

and these

Issabella · **Posted:** Tue Dec 20, 2016 4:14 pm **(#35)**

not easy to find casted photos.

dinasset · **Posted:** Wed Dec 21, 2016 1:03 am **(#36)**

Thanks Issabella.
Hope someone interested in will post his/her results too.

Issabella · **Posted:** Wed Dec 21, 2016 2:21 am **(#37)**

I did a few more tests and I definitely find this filter very useful and effective.

Issabella · **Posted:** Wed Dec 21, 2016 2:22 am **(#38)**

and these

iarga · **Posted:** Wed Dec 21, 2016 3:43 am **(#39)**

Dinasset, I prefer your last version, very nice. Thank you.

In some cases your first filter is more effective, but for general use the last version is better.

iarga · **Posted:** Wed Dec 21, 2016 3:53 am **(#40)**

Issabella wrote:

I did a few more tests and I definitely find this filter very useful and effective.

Issabella, your very green "bush/forest" image, is for auto color balance difficult. Because it is really very green. When a automatic color balance compensates this, the image will be too magenta. The filter doesn't know bush with green leaves has to be green.