A well know technique is called "luminosity masks". You create a selection mask where the pixels selection level is:
100% or near 100% in the luminosity range that you want to change,
0% or very low in the luminosity range you don't want to change,
intermediate for pixels between these two ranges
This done by:
making a grayscale copy of your image
I'll interpret your question in the opposite way everyone else has. You seem to me to be asking how to prevent the details becoming visible again. Once you have darkened your image, increase the black point. This will make the new shadows actually black, and prevent the details from being recovered.
You can do this in levels in most editors, or with curves:
If there were an easy solution to this, Camera manufacturers would have built it in-camera (and cashed out) long ago :)
Here's the problem.
The best modern cameras are sensitive to at most ~15 stops of dynamic range, whereas estimates have put the dynamic range of the human eye at around 20 stops (see this post, for example). In short, your camera can't see ...
As @Matt has said, there is no way (at least short of NSA or NASA level software) to separate multiple exposures on film.
In your case, it's worse than that. Kodachrome, as a slide film, loses information when overexposed (much the way negative film loses information when underexposed), and 3x exposure (about +1.5 stops total) is well out of the exposure ...
You cannot undo multi exposure on film nor separate the exposures from one another.
But why not keep the triple exposure image as it is? I mean, it has an artistic value, the photo tells a story. The moment the big catastrophy happened, you experienced a smaller 'catastrophy' with your camera. I think that's an interesting connection. Maybe give the photo a ...
If I understand your question correctly, you are looking for more control over the lightness and darkness over specific parts of an image - more than what the Levels tool gives you.
If so, then with Photoshop you have lots of options. I'll cover a few going from "blunt instrument" approach through to "potentially hours of work". Most general purpose image ...
What curves do photographers use when modifying the contrast of their photographic images?¹
The vast majority don't do their own curves programmatically, which seems to be what you are seeking.
Instead, most start with a "canned" default curve, such as your example of y = a*x + b, applied by their chosen raw processing application, and then either ...
No, T3i firmware will not install on your T5. Firmware is always very specific to each camera model.
Magic Lantern is a free 3rd party firmware add-on that is available for many different Canon DSLRs. It unlocks many hidden features, but it is not yet fully developed for the T5/1200D.
From what I have talked to people that write firmware: They all used C.
A classic example that I've loved to death: The fantastic FOSS mp3 player firnware Rockbox is mostly written in C.
I guess mainly for simplicity (little overhead) and speed.
Here's a relevant Quora link: Why is C preferred over C++ in firmware development
A short quote from a ...
darktable 3.0 has a new "culling mode". It displays a fixed number of consecutive images starting from the first selected, and allows you to pan & zoom them. You can zoom up to 100%, hence compare precisely the sharpness of several images. Activate it from the menu at the bottom of the lighttable, or press x with the relevant pictures selected.
For Mac users - a new webcam app.
I'm adding this to existing 'webcam' questions for future searchers.
I am in no way affiliated with this product or the company making it - this is a simple user to user recommendation.
I just discovered this today, announced on DPReview a new product called Cascable Pro Webcam £40 [£30 for the first week to 24 July 2020]
Not sure if this is an option you have already tried or not, but this might help speed things up for you.
In the Library module, choose the "Attribute" filter option from the filter bar across the top, and you can choose the "unedited photo" filter ... that will then show all the unedited photos in that folder. Once you've got them all ...
As user Please Read My Profile demonstrates in his answer to What does an unprocessed RAW file look like?, DCRaw and many of the raw conversion applications which draw upon DCRaw under their hoods are capable of doing what you desire in terms of converting linear sensor output to a viewable monochrome image without demosaicing.
With some raw processors that ...
The RAW data is the RAW data. You do not save changes to the raw file.
I.E. You can not alter the data within the RAW file/container itself.
If you use software to edit the RAW data you then save those edits to another file format such as JPEG or TIFF, the RAW file/container itself is not changed.
I do not know if there is any software that will read a RAW ...
You're looking for a concept called 'super-res'. There's tools in python to do it, but most is all one-off and custom due to the amount of tuning needed.
Some cameras are main-streaming it though, so you may see more tools coming out.
You can also look at some astronomical processing software, but you'll have to provide the decoded individual frames. In ...
Use the profile loader that comes with DisplayCAL for loading profiles.
Some software (e.g. f.lux) may interefere with DisplayCAL's profile loader.
Otherwise, DisplayCAL's profile loader doing an excellent job.
I’ve written a simple free and open source multi-platform desktop app that does exactly that: http://jiotty-photos-uploader.yudichev.net/. It’s been used quite a lot by now and is considered stable.
Jiotty Photos Uploader is a simple desktop application for Windows, macOS and Linux that scans a folder, including all subfolders, for photos and videos, and ...