Human Computer Interaction - INPUT OUTPUT CHANNELS
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HCI is the study, planning, design of the interaction between humans and computers. A human’s interaction with the outside world occurs through information being received and sent: input and output. In an interaction with a computer the user receives information that is output by the computer, and responds by providing input to the computer.
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Human Computer Interaction - INPUT OUTPUT CHANNELS
- 1. HCI- INPUT OUTPUT CHANNELS Prof. Prajwali Korde IT International Institute of Information Technology, I²IT www.isquareit.edu.in
- 2. Input Output Channels Five Senses • Sight • Hearing • Touch • Taste • Smell • E.g:-personal computer (PC) with a mouse and a keyboard. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 3. Vision Two stages in vision • Physical reception of stimulus • Processing and interpretation of stimulus • what will and can't be perceived visually by a person's being, that successively directly affects the approach that we tend to design pc systems. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 4. The Eye - physical reception • Mechanism for receiving light and transforming it into electrical energy • Light reflects from objects • The cornea and lens focus the light into a sharp image and creates that image on the back of the eye i.e. the retina. • The retina is very sensitive to light. • Retina contains two types of photoreceptor: 1. rods 2. cones. • Images are focused upside-down on retina • Retina contains rods for cones for colour vision and low light vision. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 5. Rods • extremely sensitive to light • Allow to see under a low level of illumination. • The rods are active and are saturated by the impulsive light. • a hundred and twenty million rods per eye that are mainly located to the edges of the retina. Cones • Less sensitive to light • There are three types of cone • Cones are sensitive to light having different wavelength. • around 6 million cones on concentrated on particular part of retina called as the fovea. fovea is a small area on which images are fixated. • Blind spot • Where the optic nerve enters the eye. The blind spot has no rods or cones. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 6. • Ganglion cells (brain!) – • X Cells – X cells are concentrated at fovea where it is responsible for the early detection of pattern. • Y-cells – These cells are distributed in the retina and responsible for the early detection of movement. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 7. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 8. Interpreting the signal • Size and depth – Visual angle - It relates to distance and size from eye (indicates how much of view object occupies) – Visual acuity – It is a ability to perceive detail – If the objects are familiar object perceived as constant size , even change in visual angle doesn’t affect – Cues like overlapping help perception of depth and size International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website -
- 9. Visual Angle International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 10. Interpreting the signal (cont) • Brightness – Subjective reaction to levels of light – Affected by luminance of object – Measured by just noticeable difference – Visual acuity increases with luminance as does flicker • Color – Made up of hue, intensity, saturation – Hue is determined by the spectral wavelength of the light. – Intensity is the brightness of the color – Saturation is the amount of whiteness in the color. – Cones sensitive to color wavelengths(red, green blue) – Color vision is worst at the periphery where rods predominate and best in the fovea – Blue acuity is lowest – 8% males and 1% females colour blind International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 11. Interpreting the signal (cont) • The visual system compensates for: – Movement – Changes in luminance. • Context is used to resolve ambiguity • Optical illusions sometimes occur due to over compensation International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 12. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 13. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 14. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 15. Optical Illusions the Ponzo illusion the Muller Lyer illusion International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 16. International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in
- 17. Thank You Contact No: 8087348439 Email Id: prajwalik@isquareit.edu.in Website: http://www.isquareit.edu.in/ International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in