Supermoon

Getting more nuanced with compositing

In this week's edits I look at some trickier blends while compositing with the watermark module. I use a 15 second and a 1/4 second exposure of the supermoon rising and create an HDR image with parametric blending. I discuss some considerations involved in this composite in an attempt to show more nuance associated with the process.

The Edit My RAW this week is a shot from Thailand that was previously processed with beautiful results. I attempt to compliment the photographer's work with a few of my own touches.

The RAW files used in this video are available here
Supermoon (15 second)
Supermoon (1/4 second)
Thailand
Thank you for the contribution Norman 🙂

Here is my latest version of my compositing script:

#!/bin/zsh

ls -t .config/darktable/watermarks/tmp* |grep -v svg |head -n1 |read file
inkscape -f "$file" -l '.config/darktable/watermarks/tmp.svg'
ls -l '.config/darktable/watermarks/tmp.svg' |cut -d' ' -f5 |read size_n
ls -lh '.config/darktable/watermarks/tmp.svg' |cut -d' ' -f5 |read size_h
[ $size_n -gt 8000000 ] && echo "File too large. Size $size_h, but needs to be smaller than 8M." || echo "File size okay $size_h"

I set it up with a hotkey sequence and use it often now.

Lab Color Chart

This Week Is All About Color

I've been working on a Lab Color Reference Chart, which you can download here. I looked through many thousands of images to find examples of common colors. After sampling and sanity checks on the data, I came up with these numbers as starting points for white balance and color correction in general.
These references are already quite valuable in my work; I hope they help you also. I put a copy of the png file in the directory I'm working in, to give me quick reference to the chart while working in Darktable.

The RAW file used in this video is available here. Thank you Andreas for the contribution 🙂

I also calibrated my monitor for both web and print profiles. After a bunch of bumping around in the dark, I came up with a simple solution here:

#!/bin/zsh
dispwin -c
dispcal -v -m -H -y l -q l -t 6500 -b 80 -g 2.2 web
targen -v -d 3 -G -f 128 web
dispread -v -N -H -y l -k web.cal web
colprof -v -D "web" -C "Harry Durgin Photography" -q m -a G -n c web

dispwin -c
dispcal -v -m -H -y l -q l -t 5500 -b 80 -g 2.2 print
targen -v -d 3 -G -f 128 print
dispread -v -N -H -y l -k print.cal print
colprof -v -D "print" -C "Harry Durgin Photography" -q m -a G -n c print

I switch between them with a hot key sequence. For web I use

dispwin -I web.icc

and for print

dispwin -I print.icc

I hope it works for you too.

Parametric Masks

Parametric Masks

In this video I demonstrate the functioning of the parametric mask sliders in Darktable, use my new compositing functionality on a contributed RAW file, and introduce my Lab color reference chart.
Along the way, there are quick tips on Inkscape and on adjusting panel width and font size in Darktable. I use compositing in Darktable like an old hand now, but here's a quick reminder from last week: Keep your SVG file under 8mb; use Inkscape to convert it from a bitmap like this:

inkscape -f filename.jpg -l filename.svg

and put your SVG file here

.config/darktable/watermarks/

The RAW file used in this video is available here. Thank you Jack for the contribution 🙂