Week 7 Flashcards
Analysis filter synthesis
A way to analyze visual scene and predict how observer will see if: spatial frequency analysis
Furier analysis
Any black/white “sine wave”, can be broken down into contrast, spatial frequency, and orientation
Modulation transferring function/contrast sensitivity
Sine waves measure contrast threshold
Filtering
Contrast threshold data filtered into sine waves that make image
Furier synthesis
Recombine sine waves into image, estimate of what observer sees
Ambiguous stimulus
Objects appearance can vary with perspective
Analysis followed by synthesis
To some extent, perceiving objects is an act of construction from smaller parts
Low level vision
Detecting light, color, movement, etc on the retina
Mid level vision
Rules for combining features from low level vision into larger objects
High level vision
Knowing what object is, even when perspective changes
Gestalt school of psychology
Wertheimer “laws of grouping/figural organizations “the whole is different than the sum of parts
Occlusion
1 object blocks edges of other, cue to which line goes with what object
Perceptual committees
Job of middle vision to interpret info from low level vision middle vision behaves like specialists “feature detectors”
High level vision
Object recognition in temporal lobe
Acuity
Refers to ability to resolve fine detail; but images of real objects are made up of both sudden/gradual shifts of luminance across space
