PPT-Perception and Color Huamin Qu

Hong Kong University of Science and Technology Outline Human perception for patterns Illusion Color Visualization is really about external cognition that is how resources outside the mind can be used to boost the cognitive capabilities of the mind. CMSC 435/634. Light. Electromagnetic wave. E & M perpendicular to each other & direction. Photon wavelength . l. , frequency f = c/. l. Visbile. . l. ≈ 380 nm (blue) to 720 nm (red). Photon energy q = h f = h c/. :. a. increase. b. decrease. c. stay the same. d. first increase, then decrease. . 3. A . blind experimental design should be sufficient to eliminate:. a. placebo effects. b. experimenter effects. c. self-selection. AP Psychology. Ms. C. Fahey. We do not actually experience the world directly, but instead we experience it through a series of “filters” we call senses. . The study of these sense and their effect on our behavior is called . under Extended Luminance Levels. Min H. Kim Tim . Weyrich. Jan . Kautz. University College London. ACM SIGGRAPH . 2009. Advances in Display Technology. 2. CRT. LCD. 1. st. HDR. 2. nd. HDR. Luminance Impacts Color Perception?. Fatmah . Sakran. 200901078. Definitions . Sensation:. The detection of physical energy emitted or reflected by physical objects. Occurs when energy in the external environment or the body stimulates receptors in the sense organs.. Perceptual constancy. Stimuli changes, object perceived to stay the same. In other words:. Image on retina . changes. , but brain perceives image as being constant/unchanging . Stimuli changes, but . Color Vision. :.  . The reason why humans perceive different colors in the environment is because of the manner in which the visual system processes various wavelength energy present in the environment.. Introduction. Sensation =. . stimulation of sense organs. . Perception = selection. , organization, and interpretation of sensory input. An Overview of Sensation to Perception. The Visual System: Essentials of Sight. Eric King. Humans perceive color when light enters the eye and is detected by the photoreceptors, called cones, which are mainly located in the fovea. We have trichromatic color vision which means we have three different kinds of cones that detect a specific wavelength of light, namely short (blue), medium (green), and long (red). How we perceive color also depends on how dim or bright the light is. . Introduction. Sensation. The . process by which our sensory receptors and nervous system receive and represent stimulus energies from our . environment. Perception. The process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and . Outline. Color and Color Space. Color for information visualization. Color harmonization. Visible Light. Visible Spectrum of Light . Wavelength. Human Vision. Human Cone Response to Color. three cone types (S,I,L) correspond to B,G,R . I247. UC Berkeley. Spring . 2010. Acknowledgments. Thanks to slides and publications by . Marti Hearst, Pat . Hanrahan. , Christopher Healey, . Maneesh. . Agrawala. , and Lawrence . Anderson-Huang, Colin Ware, Daniel Carr.. 6-8%. Module 16. Basic Concepts of Sensation and Perception. Learning Targets. 16-1. Describe . sensation. and . perception. , and explain the difference between . bottom-up processing and top-down processing. Processing. Cherdyntsev E.S.. What Is Perception?. We know that humans perceive data, but we are not as sure of how . we perceive. . . We . know that visualizations present data that is then perceived.