Basics Vision Ware Vislab CCOM Data Classes Scalar

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Basics Vision+ Ware: Vislab: CCOM

Basics Vision+ Ware: Vislab: CCOM

Data Classes § Scalar Field • 1 D • 2 D • 3 D

Data Classes § Scalar Field • 1 D • 2 D • 3 D § Vector Field • 1 D • 2 D • 3 D § Time Varying • All of the above What is a map? § Discrete • 1 D • K-dimensional § Nominal • Overlapping sets of data with multiple nominal attributes § Graph G = {V, E} • • Tree Directed acyclic Entities and Relationships Hyper graph Ware: Vislab: CCOM

Human Visual Field

Human Visual Field

Visual Angle

Visual Angle

1 diopter: a lens that focuses at 1 meter. 45 d Cornea ~15 d

1 diopter: a lens that focuses at 1 meter. 45 d Cornea ~15 d Lens d = 1/f

Acuities Vernier super acuity (10 sec) Grating acuity Two Point acuity (0. 5 min)

Acuities Vernier super acuity (10 sec) Grating acuity Two Point acuity (0. 5 min) What is the ideal resolution

CAVE i. Phone 1136 x 640 8 cm 1280 x 1024 § Resolution problems

CAVE i. Phone 1136 x 640 8 cm 1280 x 1024 § Resolution problems § Light scattering problems

CAVE i. Phone 140 pixels/degree 1280 x 1280 20, 000 pixels/ deg 2 14

CAVE i. Phone 140 pixels/degree 1280 x 1280 20, 000 pixels/ deg 2 14 pixels/deg 196 pixels/ deg 2 § Resolution problems § Light scattering problems

Immersion VR § HMD + head tracking § Data glove

Immersion VR § HMD + head tracking § Data glove

Human Spatial Acuity

Human Spatial Acuity

Cutoff at 50 cycles/deg. § § § Receptors: 20 sec of arc Pooled over

Cutoff at 50 cycles/deg. § § § Receptors: 20 sec of arc Pooled over larger and larger areas 100 million receptors 1 million fibers to brain A desktop screen may have 30 pixels/cm – need about 4 times as much. § I phones better. § VR displays have 5 pixels/cm

Aliasing and Anti aliasing

Aliasing and Anti aliasing

Temporal Aliasing § Human Flicker fusion 50 Hz § Temporal aliasing occurs with moving

Temporal Aliasing § Human Flicker fusion 50 Hz § Temporal aliasing occurs with moving targets § Must compute motion blur to fix the problem

Acuity Distribution

Acuity Distribution

Brain Pixels

Brain Pixels

Ware: Vislab: CCOM

Ware: Vislab: CCOM

Ware: Vislab: CCOM

Ware: Vislab: CCOM

Visual search

Visual search

The Process of Visual Thinking Ware: Vislab: CCOM

The Process of Visual Thinking Ware: Vislab: CCOM