that’s great. I can provide a bunch of scans. I tried upload to filebin.net without luck (generic “network error”, something on their side). Anyway I created a folder on Yandex Disk: https://yadi.sk/d/Vw_juxhc-q67Kg
right now there are only 3 negatives. A couple 6x9, two 6x6. I tried to pick different light/exposure/colors sets. One is night, one a grey day, etc.
These are scanned with an Epson V700 with Vuescan parameters as follow, which produces 16-bit tiff: mode= transparency, media= image, bits per pixel = 48, dpi = 3600, medium infrared clean, output colorspace Widegamut RGB, output format: tiff 48-bit RGB and separate IR-channel: 16-bit
so two separate scans/files by negative: the regular and the 16-bit infrared channel only.
I didn’t scan in 64-RGBi because for my tests with the Lightroom NLP plugin it’s unusable. But if you want I can just rescan.
some border is included in this negatives. The orange mask varies by film and/or development. It’s not used by NLP/LR but the little I have played with Darktable, unless I missed something, one needs to sample the orange mask for the inversion.
I also prefer having IR in a separate file, dealing with a 4 channel tiff is more difficult, so these are perfect
Yes, confirmed, in the latest version of film negative tool (which should be included in RT 5.8, and only supports DSLR) i also added the ability to pick the film base color. It helps in getting more consistent results when converting multiple negatives at once.
If i find a way to implement scanner tiff support, i will definitely include that feature.
Here’s a first attempt, obtained by horribly mangling the RT source code and hardcoding values left and right
btw, this shot was a “wrong” one, I mean it was taken against very bright sun, I was blinded, but just wanted to see what I could do with it. I did use a longer shade, hence the vignetting.Lot of reflection and flare. The film is Lomography 100.
for comparison, this negative processed in Gimp, 2-clicks without any additional tweaking: auto WB then invert:
after this one I took shots from the other side, ahead from the left bank of the river, as seen from this one, where I am on the bridge. Tiff (2010-12-15-0006) uploaded to the yadisk folder.
Processed the same way in Gimp (auto WB + invert):
both need further hand tweaking but I found the Gimp one a bit better. The look of the two is consistent with paper/lab prints of this Lomography 100 film, reminiscent of Kodak Gold or similar cheap consumer film, often tagged “vintage 70’s/80’s” nowadays.
The massive posterization in the blue/purple areas is a conseqence of the source image being only 8 bits, i believe.
(sorry for the gradient band at the top, i use it for debugging )
hello again. I was away travelling for a couple weeks. You get good result.
I try now to get some sense of the technicalities on your main thread here
but I guess i will just have to wait for some code to appear in the current official git. By now nothing when I build the recent source.
I kept testing with different kind of emulsions (Ektar, Protra 160, Portra 400, Lomography 100, Lomography 400) and diverse kind of daylight and lightning. The only practical one-click inversion that I have been using until now with Gimp does fail with quite some negatives, requiring a lot of manual adhoc post-processing, while NegativeLabPro works very well consistently (have tried 12-shots demos on a couple diffferent virtualboxes …) so considering to buy.
I can post more raw negs for you to play, if that’s of some use, but also I should see what is said on Gimp boards or some place where color negative inversion in general may be discussed.
In some cases the positive produced by Vuescan or EpsonScan from the Epson V700 is still the best image, yet NLP outperforms it and basically it seems because in the default setting it uses Fuji Frontier scanner colours matrix, as I understand.
I need also to shot some 35mm and play with the Proscan 10T that I use for these.
yes, i haven’t yet created a PR because i still have to implement infrared cleaning, and fix lots of stuff. I’m afraid i won’t make it in time for the 5.8 release.
In the meantime, i’ve created a dedicated branch on my git repo. If you have already built rawtherapee from source with the usual build-rawtherapee script, you can easily build this modified version by doing:
cd ~/programs/code-rawtherapee/
git checkout dev
git pull
git checkout -b rom9-filmneg_nonraw dev
git pull https://github.com/rom9/RawTherapee.git filmneg_nonraw
<it will ask to merge, commit the merge>
./tools/build-rawtherapee -b
Keep in mind that this is a preliminary version, so for example thumbnails don’t work, as the film base color picker. Also, it may crash a lot so please be patient
You’ll notice i’ve moved the film negative tool from the “Raw” to the “Color” panel, just under Film Simulation.
To convert a negative, you can use the “Pick neutral spots” button and pick 2 different levels of gray (darker and lighter) from the negative, to auto-calculate the exponents.
You can use the “Reference exponent” slider to boost the contrast when needed.
After that, use normal WB controls to adjust the colors.
It’s still not a finished work, but you should be able to do some tests and get an idea of the results.
Please report back if you do
I use an old Omega enlarger base and column. You can find old enlargers on eBay or Craig’s list for under $100. They have excellent mechanisms for mounting your camera and adjusting the height.
I use the same enlarger base and column. But did no construction. Just removed the head and used and Adapter Spigot to attached an Arca Swiss mounting clamp. Simple.
Hi everybody!
After ask some information about how to enable negative module for non raw file (Yes compiling is not enough, think to check in “color” panel and not in “raw” panel :)), it work like a charm!
For somebody want, I share with you some scan from vuescan of three color negative. I use similar preset like @antoniob (except DPI). You can download this file here (three different negatives) :
The major problem is in highlights : they are bery “burn” and you need to lower the Reference Exponent cursor. I plan to retry scan with other parameter to keep highlights : when you use vuescan s’negative and color option, it’s more balanced beetwen dark and white part of the image.
I have come back to see if any further developments had come and it seems, if I understand, that you have indeed made good progress but that it is not yet in with v5.8 released in Feb 2020.
Are the instructions you gave on Jan 6th still applicable to try the latest test development? I am really keen to have a good raw negative colour conversion because it costs me ever so much to have them done by the lab. It seems Negative Lap Pro (NLP) which costs upwards of $100 and requires Adobe Lightroom is the only reliable means to achieve this (appreciating scripts like NegFix etc which do an OK job but not perfect).
Many thanks for your efforts. I wish I could code in C++…I’d try to help but alas I am a Delphi developer so not any use to your project.
Seemed to successfully compile and make. No errors reported. Navigated to /myusername/programs and two folders listed :
code-rawtherapee (source code - no binary executable)
rawtherapee (empty)
What might I have done wrong? Any ideas? Sorry to pollute the thread with just compile errors but I thought it might help anybody else who hits compile hurdles.
This might be caused by the temp folder. I think you have to first run the build-rawtherapee script from your home directory, and then follow the additional instructions in the above post.
Try deleting everything, and start from scratch by following the instructions on the wiki: http://rawpedia.rawtherapee.com/Linux#The_Automatic_Way
(running the build-rawtherapee script from your home dir). This should build the current official dev branch, and place the executable under ~/programs/rawtherapee.
At this point, follow the instructions in the post above (without creating any new folders). This should work, and place the newly compiled executable in the right place.
Recently bought a scanner to archive and restore my Grandads old negatives.
I’ve spent all Sunday trying to compile from Source the latest dev branch ( precursor to rom9-filmneg_nonraw dev branch).
After trying with Homebrew, then MacPorts and then the bash script at the end of the Wiki; I cannot resolve the errors ( First time compiling on Mac, a fair amount of experience on my Linux File server).
Does anyone have either updated MacOS build instructions or a rebuild binary / .app for the filmneg_nonraw branch?
Are you trying to compile the latest dev branch from the official upstream repo, or the dev branch from my repo (rom9/RawTherapee) ?
In the second case: that version is a bit obsolete, i’m working on non-raw file support right now, and i will soon push a proper branch in the upstream RT repo, so it should be much easier to build, using just the regular build instructions from RawPedia.
Instead, if you’re getting errors building the official dev branch, can you post the error messages? (Be warned that i have zero experience on the Mac… )
Thanks for letting me know; I’m busy with work next few days but I’ll compile and test as soon as I can. Just read through your post… I really need to learn more about Photography workflows!
I have dabbled with the Film Negative tool in RT, and I can’t even figure out how to force it to DO the inversion. I can mess around with the background, change tint, etc, but in the end all I have is still an image of a few strips of film.
I don’t want to make a big production of this, I just want to take pictures of negative pages (entire roll of film at once) so I cam print up contact sheets, From those I’ll see of there’s anything I want to do a regular full digitization of with a Kodak Scanza.
)
