Digital Image Processing

Introduction to structure of human eye The lens focuses light from objects onto the retina. The retina is covered with light receptors called cones (6-7 million) and rods (75-150 million). Cones are concentrated around the fovea and are very sensitive to colour. Rods are more spread out and are sensitive to low levels of illumination. Each cone is connected to each own nerve end.  They can resolve fine details  Sensitive to color       2. Many rods are connected to a single nerve end  Limited resolution with respect to cones  Not sensitive to color  Sensitive to low level illumination.                                              Density of cones and rods across a section of the right eye