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Engineering
Materials and Chemical Engineering
How do we know what a material is just by looking at it?
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[QUOTE="Klystron, post: 6224294, member: 614295"] How do you identify anything from an image? Post #2 describes the physics and #4 biology. We learn to recognize objects from images as young children immersed in our cultures. I do not remember seeing my first photograph but I do remember seeing drawings in books that were described as Tree, Ball, Sun, etc. Learning to read was easy. My father recited from the Bible tracing the words with his finger while I dozed in his lap. At some point the squiggles became words and I could read print from then on. Television was a different learning experience. Blobs of moving silver and gray resolved to images 'if I let them'. As a child I could see the raster scan on a black&white NTSC television screen. Years later I went through a similar learning experience learning to discern signals on a radar screen displaying raw data signals as light blips on horizontal "grass" against a green phosphor background. Some (rare) people could not recognize the signal at all. Others could learn to recognize an aircraft return from a bird in flight and know aspects of relative motion. Behavioral psychologists such as B.F. Skinner study perception. See also 'foreground and background'. [/QUOTE]
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How do we know what a material is just by looking at it?
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