hw5 - Due 5:00 PM Monday EE 695A 1 Homework No 5 Spring...

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Due 5:00 PM Monday, 4/12/99 EE 695A Homework No. 5 Spring 1999 1. Shown below is the index matrix for a 3 x 3 halftone screen 4 1 5 3 7 2 0 8 6 a. Assuming the continuous-tone image is expressed in units of absorptance, find the corresponding threshold matrix. b. Determine the dot profile function p [ m , n ; b ]. 2. Threshold matrix from dot profile. a. Show that the threshold matrix t [ m , n ] can be found from the dot profile function p [ m , n ; b ] by simply summing up the stack of binary textures. (Assume all gray values are in units of absorptance between 0 and 1.) b . What will happen if the dot profile doesn’t satisfy the stacking constraint? c. Use your answer to part a. to find an expression for the DSFT T ( μ , ν ) in terms of the DSFT’s P ( μ , ν ; b ) for each texture for 0 b 1. 3. For a binary printer, I gave in class an expression for the CSFT of the continuous- parameter halftone image in terms of that of the continuous-parameter, continuous- tone original image, when the image is obtained by screening with an
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hw5 - Due 5:00 PM Monday EE 695A 1 Homework No 5 Spring...

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