02-07 Lecture Slides (Final)

Of information n information directly information

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview:   Information directly available with stimulation of the receptors n༆  ¨༊  Simple visual features, contours, orientations, etc. Additional information based on our prior experiences and knowledge n༆  Consistent perceptual cues or principles acquired through experience ¨༊  ¨༊  n༆  Gestalt principles Use of depth/distance cues Knowledge and expectations Bottom-up (data-driven) processing Driven by the analysis of the input given Top-down (conceptually driven) processing Driven by what we already know from our prior experiences and contexts Both bottom-up and top-down processes are crucial 2 2/8/13 Bottom- Up Sources of Information n༆  Information directly Information directly available with stimulation of the receptors ¨༊  The image projected onto the retina (a 2D image) serves as a starting point ¨༊  The analysis of visual features plays a crucial role in bottom- up processing Feature Analysis as a Basis for Pattern Recognition: Some Evidence n༆  Some neurons are known to be sensitive to simple features Feature Analysis as a Basis for Pattern Recognition: Some Evidence n༆  Our recognition of letters are affected by visual features 3 2/8/13 Feature...
View Full Document

Ask a homework question - tutors are online