spatial frequency: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “spatial frequency” mean?
A measure of how often a pattern repeats per unit of distance in space.
Audio
Pronunciation
Definition
Meaning and Definition
A measure of how often a pattern repeats per unit of distance in space.
In vision science, signal processing, and imaging, it refers to the level of detail or fineness of a visual pattern, often quantified in cycles per degree of visual angle.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences. Spelling of related terms may differ (e.g., 'visualise' vs. 'visualize').
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency and specialised in both dialects, confined to technical fields.
Grammar
How to Use “spatial frequency” in a Sentence
The [noun] has a [adjective] spatial frequency.Researchers analysed the spatial frequency of the [pattern/image/grid].Vocabulary
Collocations
Examples
Examples of “spatial frequency” in a Sentence
verb
British English
- [No standard verb form]
American English
- [No standard verb form]
adverb
British English
- [No standard adverb form]
American English
- [No standard adverb form]
adjective
British English
- The spatial-frequency analysis revealed fine details.
- They used a spatial-frequency filter.
American English
- The spatial-frequency analysis revealed fine details.
- They used a spatial-frequency filter.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Common in vision science, physics, engineering, and medical imaging journals.
Everyday
Extremely rare; would only be used when explaining technical concepts to a layperson.
Technical
Core term in optics, image processing, psychophysics, and computational neuroscience.
Vocabulary
Synonyms of “spatial frequency”
Strong
Neutral
Weak
Vocabulary
Antonyms of “spatial frequency”
Watch out
Common Mistakes When Using “spatial frequency”
- Using 'spatial frequency' to refer to how often something happens in a location over time (that is 'temporal frequency at a location').
- Confusing high spatial frequency with 'high speed'.
FAQ
Frequently Asked Questions
They are related but not identical. Resolution often refers to the smallest detail that can be distinguished, which is linked to the highest spatial frequency a system can reproduce.
No, for sound waves, the term 'frequency' alone refers to temporal frequency (pitch). Spatial patterns of sound pressure are not typically described this way.
A newspaper photograph: up close you see the fine dots (high spatial frequency), from a distance you see the smooth image (lower perceived spatial frequency).
It helps explain how we perceive edges, textures, and objects, as different neural pathways in our visual cortex are tuned to different bands of spatial frequency.
A measure of how often a pattern repeats per unit of distance in space.
Spatial frequency is usually technical/scientific in register.
Spatial frequency: in British English it is pronounced /ˈspeɪʃl̩ ˈfriːkwənsi/, and in American English it is pronounced /ˈspeɪʃl̩ ˈfrikwənsi/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think of a zebra's stripes: stripes close together = high spatial frequency; stripes far apart = low spatial frequency.
Conceptual Metaphor
SPATIAL FREQUENCY IS A MEASURE OF VISUAL TEXTURE.
Practice
Quiz
What does a 'high spatial frequency' pattern typically look like?