PPT-Light & Perception

CS5670 Computer Vision Noah Snavely Announcements Quiz on Tuesday Project 3 code due Monday April 17 by 1159pm artifact due Wednesday April 19 by 1159pm Can we determine shape from lighting. 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/. Processing the World. Notice Anything Strange?. “N is sort of…rubbery…smooth, L is sort of the consistency of watery paint… Letters also have vague personalities, but not as strongly as numbers do.”. 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 . Types of pencils. 9H being the hardest lightest one and 9B the softest darkest one. Using pencils. The . H pencils . are the hardest and are good for fine details.. While the . B pencils . are the softest and are best for shading.. CHAPTER 4. SENSATION & PERCEPTION. Sensation. : The process of receiving stimulus energies from the external environment and transforming those energies into neural impulses.. How energy from the world is transformed into neural impulses that our brain can understand.. Principals of Behavior. Chapter Three. Sensation. Sensation is the process by which we detect and process stimuli in the environment.. Sensation. is the process by which we detect physical energy such as light, sound and heat from the environment by specialized . 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 . 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. Outline: Sensation and Perception. Define key terms. Describe the relationship between the physical world and its psychological representation (i.e., . sensation. ).. Discuss how we use psychological representations to identify objects (i.e., . SECTION 1: SENSATION. WHAT IS SENSATION?. Def. : what occurs when a stimulus activates a receptor. Stimulus. : an aspect of or change in the environment to which an organism responds. SENSATION CONTINUED. 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 . jfitzake@d.umn.edu. http://www.d.umn.edu/~jfitzake/Lectures/Teaching.html. Critical Facts. There are two fundamental protective mechanisms for the eye. Regulation of eyelid position (including . BLINKING. Depth Perception: The . Visual Cliff . Experiment. Depth perception . – . the ability to see objects in three dimensions, although the images that strike the retina are two-dimensional - enables . us to judge distances. . 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.