RAW photo developing & Processing

This page is really just an index for the pages that describe & demonstrate the power of dcraw & Imagemagick in a script running in termux, on your phone, for advanced processing of RAW files.

There are copies of the scripts & some config files on github. Please use that to raise issues, suggest your improvements & as a convenient way to get everything in as easy a fashion as possible.

GitHub - Linecutterx/PhotoScript: Bash scripting for use of dcraw & Imagemagick in termux - for processing RAW photos

Bash scripting for use of dcraw & Imagemagick in termux - for processing RAW photos - Linecutterx/PhotoScript

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The demonstrations & explanations are here:

Image Processing examples

I’ve kept the photos on a different page so that they don’t bung up the text/explanations. Let’s start with the minimal use of the script…

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Infrared photography using just a mobile phone

I’ve been messing with infrared photography for a year or so, but was frustrated by the need to take the photo & then go to a full sized computer to be able to process the image...I thought that there had to be a way to take & “develop” the photos using just the phone.

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Taking infrared photos using a mobile phone

There are a lot of better articles about taking IR photos than this one! Here are a selection of websites from my browsing history on the topic. There are more out there. Some of these relate to SLR cameras & some cover post-processing in greater/lesser detail. I have no affiliation

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Processing IR RAW files

We now have termux installed, with access to the the photos on your phone & with dcraw to convert the photo to something that imagemagick can process (after changing the white balance for us, if needed).

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Photo processing Software settings

The actual work of processing the RAW photo (taken with an IR filter) is done by dcraw & imagemagick (with some data manipulation using exiftool).

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Setting up the settings

The aim of this next part of the setup is to create a set of locations for settings to be stored as files, so that we can pick the ones that we want & apply them to the image that we want to process.

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Settings for use in the photo processing scripts

These are the settings/options that I have used. You might like then, want to change them or want to experiment & extend them. That’s all good! We’ll work through the settings/folders & how you might make changes. The settings files themselves are simple text files, make them with any text

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Infrared photos: making things easier

We’ve not mentioned exiftool yet, so I’ll do that now & then we’ll work through the concepts needed to turn a set of termux command line tools into a reasonably friendly system for processing a RAW photo

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Hotspot fixing

There are ways to try to compensate for the uneven exposure & that’s what I’ve tried to build into the main script. The process requires an image that has a gradient which will let us darken the central area of the image.

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Now the magic script

photoThis is the script that does all of the work!photo.sh8 KBdownload-circle First, you have to edit the script. Mainly because editing a config file & then importing it into the script is more work & not actually any easier. cd ~/.shortcuts nano ./photo.sh edit the section below to set

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How does the script work?

The script asks for the file that holds the preferences: which is copied to a new file, where it acts as the default instruction for the current & future runs.

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