Processing Photographs With GIMP
Pat David
Creative Freedom Summit 2023
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Processing Photographs With GIMP
Pat David
Processing Photographs With GIMP
Pat David
Processing Photographs With GIMP
To provide tutorials, workflows and a showcase for high-quality photography and cinematography using Free/Open Source Software.
PIXLS.US
PIXLS.US
DISCUSS.
PIXLS.US
RAW.
Processing Photographs With GIMP
Processing Photographs With GIMP
GNU Image Manipulation Program
GIMP is a cross-platform image editor available for GNU/Linux, macOS, Windows and more operating systems.
Processing Photographs With GIMP
GNU Image Manipulation Program
Processing Photographs With GIMP
Camera raw files
darktable
RawTherapee
Unprocessed (or minimally processed) image data directly from the camera sensor.
- .CRW, .CR2, .CR3
- .NEF
- .ORF
- .DNG
- .ARW
Photography
(PRE-GIMP)
(and more...)
Processing Photographs With GIMP
Collection of advanced image processing filters accessible from within GIMP (via plugin).
Photography
G'MIC
Processing Photographs With GIMP
Overview
- Composition, Cropping, Guides
- Contrast, Details, Noise
- Black and White (who needs colors?)
- Colors, Tones, Matching
Processing Photographs With GIMP
Composition
Arranging visual elements within a frame.
Removing and focusing on elements within a frame.
You may not get a second chance.
Processing Photographs With GIMP
> Composition
Tools > Selection Tools > Rectangle Select
Processing Photographs With GIMP
Tool Options
> Composition
- Aspect Ratio
- Highlight
- Guides
Processing Photographs With GIMP
> Composition
Processing Photographs With GIMP
> Composition
Processing Photographs With GIMP
> Composition
Visually locate a focal point on a guide
Processing Photographs With GIMP
> Composition
Best (to me) options
Processing Photographs With GIMP
> Composition
More dynamic, visually interesting
Processing Photographs With GIMP
> Composition
Remove unnecessary or distracting elements
Eyes naturally drawn to brighter areas
Lead the viewers eyes on a journey!
Processing Photographs With GIMP
Contrast, Details, Noise
Range of brightness across an image
Processing Photographs With GIMP
> Contrast, Details, Noise
Processing Photographs With GIMP
> Contrast, Details, Noise
-20
+20
Processing Photographs With GIMP
> Contrast, Details, Noise
Curves
Processing Photographs With GIMP
> Contrast, Details, Noise
Curves
Add some contrast ("S" curve)
Push dark tones darker, slight boost before midpoint
Processing Photographs With GIMP
> Contrast, Details, Noise
Processing Photographs With GIMP
> Contrast, Details, Noise
dETAILS
Unsharp Mask, Wavelets, FFT
Processing Photographs With GIMP
> Contrast, Details, Noise
Noise
(Embrace it!), Otherwise
Processing Photographs With GIMP
Black and White
Colors are so cliché.
Processing Photographs With GIMP
> Black and White
Without color,
Processing Photographs With GIMP
> Black and White
form and tones are all that's left
Processing Photographs With GIMP
> Black and White
Too many ways to list
- Desaturate
- Color to Gray (C2G)
- Channel Decomposition
"Luminosity" and "Color to Gray" mimic human perception of values
Processing Photographs With GIMP
> Black and White
Luminance Desaturation
(Start With)
Then tweak and combine!
Processing Photographs With GIMP
> Black and White
Put it together, desaturate luminance
Processing Photographs With GIMP
> Black and White
Contrast Curve, Color to Gray
I would actually add back some grain here...
Processing Photographs With GIMP
> Black and White
Compare
Processing Photographs With GIMP
Colors
Processing Photographs With GIMP
> Colors
Color Curves (per Channel)
Processing Photographs With GIMP
> Colors
Careful Combinations (portra-esque)
Processing Photographs With GIMP
> Colors
600+ Film Emulations
See also the Film Emulator from my friend Jonas Wagner:
for the busy photographer
G'MIC Film Simulation Presets
Processing Photographs With GIMP
> Colors
Masking
Pro-tip: don't search for "Pat David GIMP Mask" or...
Processing Photographs With GIMP
> Colors
Masking
Masking adjusts opacity of a layer
+
=
Processing Photographs With GIMP
> Colors
Masking (Luminosity Masks)
Masking adjusts opacity of a layer, based on the contents of the layer
Black are transparent
Processing Photographs With GIMP
> Colors
Masking (Luminosity Masks)
Apply the desaturated copies as layer masks, add color toning:
Processing Photographs With GIMP
> Colors
Masking (Luminosity Masks)
Classic split toning
Processing Photographs With GIMP
Put it together, experiment, break stuff
Processing Photographs With GIMP
Resources
Processing Photographs With GIMP
Thank You!
Pat David
patdavid@gmail.com
patdavid.net
Processing Photographs With GIMP
By Pat David
