Mach bands
E415497
Mach bands are an optical illusion in which the human visual system exaggerates the contrast between adjacent areas of slightly differing luminance, creating illusory light and dark bands at their boundaries.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mach bands canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4118894 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mach bands Context triple: [Ernst Mach, hasConceptNamedAfter, Mach bands]
-
A.
law of simultaneous contrast of colors
The law of simultaneous contrast of colors is a principle in color theory stating that the perception of a color is strongly influenced by adjacent colors, often causing shifts in hue, brightness, or intensity.
-
B.
Ehrenstein
Ehrenstein is a locality or district that forms part of the municipality of Blaustein in the state of Baden-Württemberg, Germany.
-
C.
Rubin–Ford effect
The Rubin–Ford effect is an observed large-scale motion of galaxies relative to the cosmic microwave background that provided early evidence for peculiar velocities and inhomogeneities in the universe’s expansion.
-
D.
Black and White in Color
Black and White in Color is a 1976 French-Côte d'Ivoire war comedy film satirizing French colonial attitudes during World War I in Africa and winner of the Academy Award for Best Foreign Language Film.
-
E.
The Structure of Appearance
The Structure of Appearance is a 1951 philosophical work by Nelson Goodman that develops a rigorous nominalist system for analyzing the structure of experience and phenomenal qualities.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mach bands Target entity description: Mach bands are an optical illusion in which the human visual system exaggerates the contrast between adjacent areas of slightly differing luminance, creating illusory light and dark bands at their boundaries.
-
A.
law of simultaneous contrast of colors
The law of simultaneous contrast of colors is a principle in color theory stating that the perception of a color is strongly influenced by adjacent colors, often causing shifts in hue, brightness, or intensity.
-
B.
Ehrenstein
Ehrenstein is a locality or district that forms part of the municipality of Blaustein in the state of Baden-Württemberg, Germany.
-
C.
Rubin–Ford effect
The Rubin–Ford effect is an observed large-scale motion of galaxies relative to the cosmic microwave background that provided early evidence for peculiar velocities and inhomogeneities in the universe’s expansion.
-
D.
Black and White in Color
Black and White in Color is a 1976 French-Côte d'Ivoire war comedy film satirizing French colonial attitudes during World War I in Africa and winner of the Academy Award for Best Foreign Language Film.
-
E.
The Structure of Appearance
The Structure of Appearance is a 1951 philosophical work by Nelson Goodman that develops a rigorous nominalist system for analyzing the structure of experience and phenomenal qualities.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
optical illusion
ⓘ
perceptual illusion ⓘ visual phenomenon ⓘ |
| affects | human visual system ⓘ |
| canBeReducedBy |
blurring edges
ⓘ
changing luminance gradients ⓘ |
| canInfluence |
interpretation of medical images
ⓘ
interpretation of radiographs ⓘ perceived quality of rendered images ⓘ |
| characterizedBy |
exaggerated edge contrast
ⓘ
illusory dark bands ⓘ illusory light bands ⓘ |
| demonstratedWith |
ramp luminance patterns
ⓘ
stepwise luminance profiles ⓘ |
| dependsOn |
contrast between adjacent regions
ⓘ
luminance level ⓘ spatial frequency of luminance gradient ⓘ viewing distance ⓘ |
| explainedBy |
center-surround receptive fields
ⓘ
lateral inhibition in the retina ⓘ neural contrast enhancement mechanisms ⓘ |
| firstDescribedBy | Ernst Mach ⓘ |
| hasEffectOn |
perceived contrast at boundaries
ⓘ
perceived edge sharpness ⓘ |
| involves |
brightness perception
ⓘ
contrast perception ⓘ luminance perception ⓘ |
| namedAfter | Ernst Mach ⓘ |
| occursAt | boundaries between regions of slightly different luminance ⓘ |
| occursIn |
digital displays
ⓘ
grayscale images ⓘ printed patterns ⓘ |
| occursWhen | adjacent areas have gradual luminance gradients ⓘ |
| perceivedAs |
bright band on lighter side of an edge
ⓘ
dark band on darker side of an edge ⓘ |
| relatedTo |
edge enhancement
ⓘ
lateral inhibition ⓘ simultaneous contrast ⓘ visual cortex processing ⓘ visual illusions of brightness ⓘ |
| studiedIn |
neuroscience
ⓘ
perceptual psychology ⓘ psychophysics ⓘ vision science ⓘ |
| usedAs |
demonstration of lateral inhibition
ⓘ
example in textbooks on perception ⓘ tool for studying spatial vision ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mach bands Description of subject: Mach bands are an optical illusion in which the human visual system exaggerates the contrast between adjacent areas of slightly differing luminance, creating illusory light and dark bands at their boundaries.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Ernst Mach