09.+Optical+Illusions

Optical Illusions An **optical illusion** (also called a **visual illusion**) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, color, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences.

Take some time to browse through different optical illusions on the following websites…

[] [] **Or use a search engine to find your own illusion…


 * 1) Find an illusion that fascinates you then click on the“Discussion” tab at the top of the webpage.
 * Click on “New Post”
 * Create a subject that goes along with your illusion ex: Vase Faces
 * In the message area write a brief description about the illusion and explain why you have chosen that particular illusion. Also include a link so that other students can click to see what you are writing about.
 * Do not check monitor this topic
 * Click post when finished.
 * Make sure that you do not post the same illusion as another classmate.
 * 1) After you have posted your illusion check out some of the other illusions that your fellow classmates have posted.
 * Please reply to three other classmates’ posts. When replying to their work two word answers are unacceptable. Please use sentences full of thought…. “That is cool.” is not good enough. Be critical and provide thoughtful commentary.
 * Keep in mind that whatever you write should always be school appropriate.
 * 1) You are going to create your own black and white illusion using Adobe Photoshop based on the Elements of Art. Check out the tutorial on how to create your own Illusion…

**<span style="font-family: 'Arial','sans-serif';">Document size: ** 8.5 inches by 11 inches (landscape or portrait) <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">**<span style="font-family: 'Arial','sans-serif';">Resolution: ** 150 <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">**<span style="font-family: 'Arial','sans-serif';">Background: ** Transparent
 * <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Document name: **<span style="font-family: 'Arial','sans-serif'; font-size: 13px;"> Illusion+your last name


 * <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">This project does not have to be uploaded to the wikipage & it will count as one of your 6 illusions for the Midtermif you would like, it will not be graded seperately. **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Illusion Requirements: **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Understanding size/proportion/ resolution
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Create your own patterns
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Black/White only
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Use of Transforms- skew, warp, perspective, flip, or distort
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Use of art elements
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Signature
 * <span style="font-family: 'Times New Roman','serif'; font-size: 16px;">Student Examples: **