Fourier High-Pass Filter
Frequency-domain filtering that removes broad tones and keeps only fine detail and edges. The result looks like a grey relief map where only outlines and textures remain.
Spot it
- 01Grey flat background
- 02Only edges and texture
- 03Fine etched outlines
Why it happens
The image is transformed to frequencies, those below a cutoff radius are zeroed, and the inverse transform leaves only rapid changes such as edges and grain.
Recreate it in Pixio
Image edit prompt“Apply a Fourier high-pass filter to this image: the broad tones and flat colors removed, leaving a mid-grey surface with only fine edges, outlines and textures visible as light and dark detail, a delicate etched look, almost no color. Keep the original subject and composition.”
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