Hi

I wrote a simple script which performs -my way- a stretching on values and colours.
I'm interested -if possible- in having input images difficult to improve up to an acceptable level.
So far I took the one Akros posted for Tin's experimental script.



using default settings in my script this is the result:



First question to Gimp-chatters:
- is it an acceptable result?
Second question:
- are there other "difficult" input images to try with? (just in case you consider acceptable the result on the test image)

Thanks

that's cool it's even better than auto white balancing.

I am wondering where the script is for download and testing.

Rod,
I'll post the script only after I will have been able to tune it (using the difficult images you gimp-chatters could kindly provide to me here)

Can't wait to try it out dinasset

By the way I did not take this photo.

- It exacerbates the chroma noise... this is quite visible on the black paint.
- Processing should be less intense on the light values: the paper is burned out, and the tiling under the grill has lost its color.

Of course the original picture is pretty bad...

#SallyAnne

I tried on you image and I post the result, but be careful on you evaluation: this script just stretches values and colours, does not sharpen a blurred image

@Ofnuts

another trial, but -as I said to SallyAnne- this script just perform stretching, so -about your first comment- it doesn't remove noise
I tried to take care of your other comments

Thanks dinasset. I was having a play with you. You asked for difficult images and thought I would give you a challenge. Does it help with white balance? The fence in the background right is supposed to be shiny grey (corrogated iron) - not white.

Sure!
Send me your "difficult" images, I was just saying that you have to expect only variations in values and colours...
I made another trial, not sure it's better (even if the white became pale grey)



edit: one of the two girls is you?

Akros,

I didn't see any comment from you on YOUR image...

Dinasset your script seems to be fantastic. the change in your first photo is spectacular. here some photos Very bad photos) do they have any opportunity?

Dinasset,
Remembering that this picture is not mine!
In post (#12) I pointed out to the author, and the place where I removed the image.
Untitled - Nathalie Martin - cc


The script seems to be getting great results!
I liked the contrast obtained on the first result (#1).
But I agree with ofnuts, the intensity was very strong.

In the example (#9) the script to have improved the adjustment. And the result was excellent.

But this same setting used in the script (#9), could be used in an image less problematic?

Manually got some decent results, but I was not 100% satisfied with any of them.
an example

Sally, I gave it a try.

here attached are your photos (not so bad, as you say, btw) after applying my script
tell me whether you like these "stretched" versions and/or you prefer some different nuances

anyhow, thanks a lot for the contribution to my tests/script tuning

Thanks Akros.
So far, in my personal tests, there is no serious drawback using "normal" images, I was asking to get here some "problematic" images (like the one you posted -you're right, I'd have said "posted by you" and not "your") to evaluate the best possible tuning
Maybe, you can post here a less problematic image to see what comes out.

Dinasset, the change is fantastic in both photos. I love it. Your script is magical!
Thank you so much.

thanks to you for your nice words, amiga!

btw: it's you with your relatives on one of the photos?

This photo was posted by Scribblemacher on the web.
It would be interesting to see if the script could handle some lighting issues, and a blue-ish color in part of the image

I managed to solve the problems of this image, but ran several steps and had to test various settings to get the final result.