PSY 162 Lecture Notes - Lecture 13: Stereopsis, Asteroid Family
Brush Technique & Depth
● In most impressional paintings-
○ Depth is conveyed through perspective, shading & luminance contrasts
○ The blurriness and elimination of details may also convey this depth
○ The blurriness makes ir impossible for the brain to use stereopsis
○ Thus the artist has hindered our ability to see the flatness of the image
The Center-Surround Organization
● Uses abrupt cues for luminance
● Works the same with depth
○ Preferring abrupt changes to gradual
■ Prefers local to global changes
Too Much Paint!
● Using thick application of paint can ass to our sense of depth
● Taking advantage to these abrupt changes in depth to mess w/ the center-surround
organization
● Van gogh put so much paint on the canvas that his paintings have a sculptural feel to
them
○ Where border between objects occur
■ There is a real change in depth
● “What is required in art nowadays, is something much alive, very strong in color, ver
much intensified.”
○ Van Gogh
Depth Illusions with Repetitive Patterns
● Repetitive patterns can cause the illusion of depth
○ The wallpaper illusion
○ 3 reason
● Misfusion- instead of matching identical elements in our two eyes, we match adjacent,
non identical elements
● The visual system matches non corresponding elements in a pattern
○ Eyes must be perfectly fixated on the plane of the image when things are
differently distant- they cast different images no each eye
○ When things are a different distant- cats different image in each eye
■ Repeated patterns confuse the visual system
Why?
● Illusion of the eye (not the brain)
● The visual system can “make sense” of these repetitive patterns at several distances
● Tries to focus at several different distances
○ The image makes sense at different distances
● The brain makes hypothesis based on how the eye is focusing
How do Artists do This?
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Depth is conveyed through perspective, shading & luminance contrasts. The blurriness and elimination of details may also convey this depth. The blurriness makes ir impossible for the brain to use stereopsis. Thus the artist has hindered our ability to see the flatness of the image. Using thick application of paint can ass to our sense of depth. Taking advantage to these abrupt changes in depth to mess w/ the center-surround organization. Van gogh put so much paint on the canvas that his paintings have a sculptural feel to them. There is a real change in depth. What is required in art nowadays, is something much alive, very strong in color, ver much intensified. Repetitive patterns can cause the illusion of depth. Misfusion- instead of matching identical elements in our two eyes, we match adjacent, non identical elements. The visual system matches non corresponding elements in a pattern.
