Sheet2ip - Tanta university Faculty of engineering Computer and automatic control department Image processing course Fourth year students Sheet 2 Date

Sheet2ip - Tanta university Faculty of engineering Computer...

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Tanta university Faculty of engineering Computer and automatic control department Image processing course Fourth year students Sheet 2, Date : 12/10/2011 ------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------- Instructor: Dr. Hamed Hemeda Sheet 2 1. Thinking purely in geometric terms, estimate the diameter of the smallest printed dot that the eye can discern if the page on which the dot is printed is 0.2 m away from the eyes. Assume for simplicity that the visual system ceases to detect the dot when the image of the dot on the fovea becomes smaller than the diameter of one receptor (cone) in that area of the retina. Assume further that the fovea can be modeled as a square array of dimensions 1.5 mm X 1.5 mm having 580x580 cones. Assume also that cones and spaces between the cones are of the same size and are distributed uniformly throughout this array. 2. Explain under what conditions(s) a camera of 1200x1200 pixels resolution gives more detailed image than a camera has 1600x1600 pixels resolution. Assume the size of sensors and their in- between distances are the same in the two camera sensor arrays. 3. Explain why: a) Objects that appear brightly colored in day light when seen by moon light appear as color less forms b) Details of the image seen by human are conveyed through cones rather than rods on the eye retina. 4. Differentiate between: a) Radiance and Luminance of a chromatic light source b) Illumination and reflectance of an object when lighting it 5.
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  • Fall '15
  • Hamed Hemeda
  • Image processing, Digital camera, Image sensor, Image processing course, picture element sensors

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