You can try this script: Gimp Script: Histogram Match - Rob A's (Im)personal Blog.
It may need to be updated to work in current Company version.
@snibgo Thanks a lot for your detailed instructions. I understand the principle of your approach. But it will take a while till I understand exactly what the script is doing.
@anon41087856 and @sguyader thanks for pointing out which other tools may help me.
Hermann-Josef
Another thought: here’s a gain-and-bias result:
This tweaks the RGB channels, giving each a multiplier and addition to make the mean and standard deviations match the target. This is simpler than the match-histogram method, and the result is fairly good. When the range of input colours is small, it is more reliable than match-histogram, so might be better for a method that chops one image into tiles, finds the tiles in the other input, matches pairwise, then blends the results.
My command was:
call %PICTBAT%imgGainBias ^
childspoon_x-0c.png childspoon_x-1c.png childspoon_gb.jpg… where imgGainBias is at Gain and bias.
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Ciao, Gabriele!
Unfortunately: no 
Have fun!
Claes in Lund, Svezia
I’m searching an FOOS for a Rawdigger alternative… Do you have any hints?
You could try HISTOGRAMMAR V1.2 2011 HISTOGRAMMAR V1.1 on Guillermo Luijk’s homepage. GUILLERMO LUIJK >> PROGRAMAS >> HISTOGRAMMAR
YMMV in using it.
I do my raw inspection in Mathematica, because so far I have never really bothered to learn Python. If you know Python, you could use rawpy · PyPI which utilizes libraw to import your files and try to find what you’re looking for.
If I understood it’s for windows only ; I’m on Linux
Have you any hints?
Ah sorry, didn’t know you were on Linux. In that case I’m afraid I cannot help you out. What is it you want to do exactly?
I was curious to analize my RAW histograms more in details: view single sensor bin (R,G1,G2;B)… I know I can find into RT with no demosaicing and the inspector…but
I’m amazed in the FOOS there isn’t a software as Rawdigger 
I’ve taken up the endeavor a couple of times, but put it aside as more pressing programming arose (sounds more ‘official’ than it is, really about what I felt like doing day-to-day… 
), Really, I put a bit of work into rawproc’s histogram, and it meets my needs rather well…
I have put some time into a command-line program that’ll read a raw file courtesy libraw, then walk the image array, collect and sum the channel data per value, and puke it out as comma-separated text suitable for opening in your favorite spreadsheet program. Libreoffice makes a nice histogram of the data with it’s column chart. Works okay on my test raw, but it’s not easily compiled by non-programmers in its present state.
Really, Rawdigger isn’t such a commercial abomination; it helps fund libraw, the open-source core library that some of us use in our raw processing programs.
Indeed I agree with this, but:
RawDigger is a microscope of sorts that lets you drill down into raw data both on Mac OS X and Windows.
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Didn’t realize that. Danged GUIs… 
Now is your chance to make a Linux version and call it “Raw Butcher”
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Well, I almost have one, if you don’t mind your GUI being LibreOffice/Excel… 
I can draw you a clever icon 
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Hi Glenn,
we are waiting 
PS. Idea 
… and if RT ( because it’s capable to make RAW histogram but in the 0-255 range for gui and velocity needs) could export a RAW histogram scale 1:1 ??
@dafrasaga Gabriele, you might find this interesting: Improvements to change main histogram to 65535 bins by Thanatomanic · Pull Request #5904 · Beep6581/RawTherapee · GitHub
The wish is to include this change for the 5.9 release of RT, but it needs some polishing up first.
Good 