LIGHT TEXTURES CLASSIFICATION
Framework for perceptual experience and understanding of light
– Luminosity framework – Spatial structure, Appearance, Source
– Transform the way light is experienced in a space -> induce/ trigger a sense of touch/ haptic feedback
Using vibration/ proprietary muscle response:
LIGHT IN SPACE – ARCHITECTURE
Explore the difference in visual textures due to the interaction of light and materials
SPACE AND PLACE – Yi-Fu Tian
“What sensory organs and experiences enable human beings to have their strong feeling for space and for spatial qualities? Kinaesthesia, sight and touch
CHAPTER 4 – Body, Personal Relations and Spatial Values
Fundamental principles of spatial organization:
1. The posture and structure of the human body
2. The relations (whether close or distant) between human beings
DIRECTION FOR FINAL FORM – Interactive Space
– Other interesting aspects to consider:
1 . The physicality of space vs. the intangibility of light – Interactions
2. Movement of bodies and bodily actions – walking vs. reaching out
3. Tactile sensations/ vibration – real or artificial?
4. The dimension of time – Can spatial awareness be translated by the relative amount of time spend in a space?
> What can be an indication of time?
5. Temperature – Can give a new sensory experience?
6. Time/ Site-specificity of light – sun light
Over the next 2 weeks:
‘Light textures’ Classification framework
Sensory experiments/ study + results > Creating light atmospheres with different qualities
Prototype of finger tactile sensory substitution (TSS) device to sense ambient light (space)
Deliverables for final presentation:
SENSORY EXPERIMENTS – Perceptual box
I built the perceptual box 🙂 I can now conduct my visual-tactile experiments.
Some Visual Experiments:
I experimented with two visual qualities of light that can be experienced visually in my perceptual box.
Playing with the ‘blinking’ LED to create rhythm with light
> Varying the interval delay – Create different rhythms
Using a servo motor to create a rotating wheel to vary the light source.
‘Sensory Modality Transition’ Experiments – Visual-Tactile (Week 12)
Aim: Associate tactile qualities with Visual Qualities of light
CONSONANCE and DISSONANCE
Light Textures Classification (Week 11-12)
Referencing ‘Sound Textures Classification’ http://alumni.media.mit.edu/~nsa/SoundTextures/
Human Perception of Sound Textures
– Perception experiments which show that people can compare sound textures, although they lack the vocabulary to express formally their perception
Texture or not?
Perceived Characteristics and Parameters:
Come up with possible characteristics and qualifiers of sound textures, and properties that determine if a sound can be called a texture.
CAN I DO THE SAME FOR HUMAN PERCEPTION FOR LIGHT TEXTURES?
> Classify light textures
> Perceived Characteristics and Parameters – Quantifiers and Qualifiers
ISEA DATA gloves workshop – Hugo Escalpalo
– Measures specific finger anatomic and gestural positions as input
– Haptic feedback: Not as output. The design of the glove has in-built mechanism to incorporate proprietary feedback using Slider Sensors and Springs. When pulled forward, the gloves use resistance to simulate the feeling of grabbing an object.
– Intended to include tracking components to track position in VR
Direction for Week 14:
I am still in the midst of designing my “perceptual box” and fine tuning the details of my sensory experiments.
Yanagisawa, H., & Takatsuji, K. (2015). Effects of visual expectation on perceived tactile perception: An evaluation method of surface texture with expectation effect. International Journal of Design, 9(1).
Evaluate Tactile feeling using four opposite adjective pairs (“nice to touch-unpleasant to touch”, “smooth-rough”, “hard-soft” and “sticky-slippery”) – Between each adjective pair was a scale comprised of five ranges. Participants responded to each adjective scale by marking the rating on a questionnaire sheet, which employed a semantic differential (SD) scale.
Things I want to explore when I finish constructing the perceptual box. I went back to look at my hypothesis for my project, and I would like to center my experiments through connecting the visual properties of light to the visual qualities of material, and see if a tactile quality can be associated.
MATERIAL PERCEPTION – Can we perceive/ infer material based on visual results of reflected light?
Build a hologram in my perceptual box:
Interesting Light phenomenon/ visual textures I noticed:
Ryoji Ikeda – Spectra (2014)
Reminds me of:
‘Touch’ in Art – What would trigger touch?
Last week, it was mentioned that I could look into works that trigger touch, but I missed out on the example that was given.
Vocab? – To find consensus between descriptions of how light is subjectively perceived
ISEA 2020 – Why Sentience?
DATA GLOVES Workshop 17-18 October
The “Data Gloves” were developed with the purpose of interacting with the VR environment “Human After”, a piece by Anni Garza Lau. Under the problem of the high cost of a set of commercial gloves, we realized that we had the ability to manufacture a pair of gloves with a very detailed ability to acquire information about the position of the fingers for a fraction of the price.
I am not sure how useful the gloves would be in terms of simulating haptic qualities, instead as a glove to obtain data but we will see how it goes.
For Week 5 and 6, I intend to start on experimentation for my project. My first step for crafting the sensory experiments would be to determine what visual qualities of light I would like and what kinds of light can be used as tools for exploration.
The Lighting Art: The Aesthetics of Stage Lighting Design by Richard H. Palmer
– Chapter 2: Psychophysical Considerations: Light, the Eye, the Brain and Brightness
– Chapter 3: Psychophysical Considerations: Color
– Chapter 4: Psychophysical Considerations: Space and Form Perception
Handbook of Experimental Phenomenology: Visual Perception of Shape, Space and Appearance by Liliana Albertazzi
– Chapter 6: Surface Shape, the Science and the Looks
– Chapter 8: Spatial and Form-Giving qualities of light
Material Perception (Visual and Haptic)
Neural Mechanisms of Material Perception: Quest on Shitsukan / Hidehiko Komatsu and Naokazu Goda
Visual perception of materials and their properties/ Roland W. Fleming
Visual and Haptic Representations of Material Properties / Elisabeth Baumgartner, Christiane B. Wiebel and Karl R. Gegenfurtner
Multisensory Texture Perception / Roberta L. Klatzky
Effects of Visual Expectation on Perceived Tactile Perception: An Evaluation Method of Surface Texture with Expectation Effect / Hideyoshi Yanagisawa, Kenji Takatsuji
The main goal of my sensory experiments would be to see if perceived tactile perception can be induced when visually perceiving or interacting with light. My experiments would center around connecting visual qualities of light to those of materials.
I would have to do further studies into visual and textile of materials through the readings, and try to formulate more concrete experiments with light using those that were conducted with materials. I plan to conduct at least two simple experiments in the following week before the presentation on Friday (week 6).
Some concepts/ ideas I am working with:
– Television static and the sensation of uncomfortable tingling or prickling, ‘pins and needles’
– Diffused (soft) vs. Sharp (hard) light, associating a tactile quality to light quality
> If a ray of hard light (laser, projection, etc) comes towards you, would you avoid it with your body?
– Studying motion/ rhythm of light (black and white) and sensory and neural conditions (epilepsy, hypnosis, vertigo, dizziness)
> Replacing objects with light?
– Optical illusions with light? Translating 2D to 3D with projected/ physical light?
> Akiyoshi Kitaoka http://www.ritsumei.ac.jp/~akitaoka/index-e.html
– Squinting at light > diffraction effect
UPDATES (Sensory experiments)
– Will update the type and specifications of the small sensory experiments that I intend to do over the week here
Week 4 (5/8/2020) – 5/5/2020 IM FYP Presentation 1
HOW – Considerations
1. What are the qualities of light that I want to touch?
> Consider controllable properties, the function of the light to be touched, the psychophysical considerations, interaction with other materials, etc
2. Consider the connection/ gap between intended action/ movement and sensory feedback
Some research on Haptics and Human Perception:
Tactile/ Haptic Feedback:
Cutaneous Receptors (perception of touch and pain, simulation of the skin)
mechanoreceptors (sensing pressure and texture
Thermoreceptors: sensing temperature
Nociceptors: sensing pain
Human Perception of touch:
Plasticity – Cortical representation of a particular function can become larger if that function is used often
Vibrotactile Perception – vibration sensation
Texture perception – Spatial cues, Temporal cues
Object Perceptive – Active Touch (experience of the objects you are touching) vs. Passive (experience of stimulation of the skin)
Haptics: technology that involves transmitting digital information through the sense of touch (apply force, vibration and motion to the user)
3. Sense of touch provides tactile information about – the hardness, softness, malleability, or rigidity, etc qualities of objects
> Are these qualities that light possess? Can they be produced and represented physically/ through tactility?
Some qualities that light possess – Intensity (hardness), Diffused (softness), texture, frequency (rhythm), motion(time), colour (temperature), direction (spatial perspective), from, luminousness (unique quality)
ONE PAGE PRESENTATION