Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing...
-
Upload
alberta-dixon -
Category
Documents
-
view
218 -
download
1
Transcript of Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing...
![Page 1: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/1.jpg)
Sang Wook Hong
![Page 2: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/2.jpg)
Neural Pathway of Color Processing
Color Appearance: local and global processing
Color Binding
![Page 3: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/3.jpg)
Neural Pathway of Color Processing
Color Appearance: local and global processing
Color Binding
![Page 4: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/4.jpg)
![Page 5: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/5.jpg)
Parallel Processing Hypothesis: Livingstone & Hubel (1987)
Retinal ganglion cells
LGN
Parvocellular color selective low temporal resolution low contrast sensitivity high spatial resolution
Magnocellular color blind high temporal resolution high contrast sensitivity low spatial resolution
1
2 & 3
4A
4B
4C
56
form form
color colorcolor
movement
Primary visual cortex
color
color
form
form
form
form
Depth
Depth
Depth
Visual area 2
MT
V4 color
![Page 6: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/6.jpg)
![Page 7: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/7.jpg)
![Page 8: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/8.jpg)
Landisman & TS’O (1999)
![Page 9: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/9.jpg)
Conway (2001)
![Page 10: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/10.jpg)
Moutoussis & Zeki (2002)
![Page 11: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/11.jpg)
Zeki & Marini (1998)
![Page 12: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/12.jpg)
Neural Pathway of Color Processing
Color Appearance: local and global processing
Color Binding
![Page 13: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/13.jpg)
• Chromatic contrast: The color of the light appears to change in a direction away from the color of the surrounding light;
• Chromatic assimilation: The color of the light appears to change in a direction toward the color of the surrounding light;
• Color appearance of a light can be altered in the presence of a surrounding light. This phenomenon is referred to as chromatic induction.
![Page 14: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/14.jpg)
![Page 15: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/15.jpg)
![Page 16: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/16.jpg)
![Page 17: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/17.jpg)
Monnier & Shevell (2003, 2004)
![Page 18: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/18.jpg)
Monnier & Shevell (2003, 2004)
![Page 19: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/19.jpg)
BACKGROUND CONDITION
+S
-S
+S-S
+S
-S
RE
LA
TIV
E R
ES
PO
NS
E
0.0
-0.2
-0.4
-0.6
0.2
0.4
0.6
+S-S
+S-S
![Page 20: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/20.jpg)
![Page 21: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/21.jpg)
![Page 22: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/22.jpg)
“Hourglass” Structure
![Page 23: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/23.jpg)
5.5 5.5 1.9
Comparison Square
11 min
Test Surround 15cd/m2Comparison Surround 15cd/m2
Test Square
20cd/m2
![Page 24: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/24.jpg)
Test Surround 15cd/m2
5.5 5.5 1.9
Comparison Surround 15cd/m2
Inducing Bars
20cd/m2
![Page 25: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/25.jpg)
Obs. S.X.
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0.62 0.64 0.66 0.68 0.7
s =
S/(
L+
M)
l = L/(L+M)
Isomeric Matches
Surround chromaticities
Test-square chromaticities
![Page 26: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/26.jpg)
Isomeric Matches
Surround chromaticities
Test on a -s stripe alone
Test&6bars on -s stripes
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0.62 0.64 0.66 0.68 0.7
s =
S/(
L+
M)
l = L/(L+M)
Obs. R.S.
![Page 27: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/27.jpg)
Isomeric Matches
Surround chromaticities
Test on a -s stripe alone
Test&6bars on -s stripes
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0.62 0.64 0.66 0.68 0.7
s =
S/(
L+
M)
l = L/(L+M)
Obs. R.S.
Test on a -s stripe with6 bars on +s stripes
![Page 28: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/28.jpg)
Neural Pathway of Color Processing
Color Appearance: local and global processing
Color Binding
![Page 29: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/29.jpg)
Is binding necessary?
![Page 30: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/30.jpg)
Retinal ganglion cells
LGN
Parvocellular color selective low temporal resolution low contrast sensitivity high spatial resolution
Magnocellular color blind high temporal resolution high contrast sensitivity low spatial resolution
Livingstone & Hubel (1987)
![Page 31: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/31.jpg)
Retinal ganglion cells
LGN
Parvocellular color selective low temporal resolution low contrast sensitivity high spatial resolution
Magnocellular color blind high temporal resolution high contrast sensitivity low spatial resolution
1
2 & 3
4A
4B
4C
56
form form
color colorcolor
movement
Primary visual cortex
color
color
form
form
form
form
Depth
Depth
Depth
Visual area 2
MT
V4 colorLivingstone & Hubel (1987)
![Page 32: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/32.jpg)
Physiological support for ‘Specific Color Pathway’
- A large concentration of color opponent cells in the CO blobs in V1
Livingstone & Hubel (1984)
- A concentration of color opponent cells in thin CO-bands in V2
Hubel & Livingstone (1987), Ts’o, Roe & Gilbert (2001)
- Cerebral achromatopsia
Zeki (2003)
![Page 33: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/33.jpg)
Multi-selective cells
- The same concentration of color opponent cells in all CO-bands in V2
Gegenfurtner, Kiper & Fenstemaker (1996)
- Color selective cells are tuned also to orientation
Kiper, Fenstemaker & Gegenfurtner(1997)
- Most color-luminance cells in V1 are tuned also to orientation
Johnson, Hawken & Shapley (2001)
- Orientation selective cells in V1 are also sensitive to chromatic variation
Friedman, Zhou & von der Heydt (2003)
![Page 34: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/34.jpg)
If the response is 5 spikes/sec, then
![Page 35: Sang Wook Hong. Neural Pathway of Color Processing Color Appearance: local and global processing Color Binding.](https://reader036.fdocuments.us/reader036/viewer/2022062421/56649cda5503460f949a4025/html5/thumbnails/35.jpg)
Illusory Conjunction (Treisman & Schmidt, 1982)
Primary task: odd or even?
Secondary task: what you saw between the numbers?
letter intrusion:
color intrusion:
illusory conjunction: