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Subject Code : CS-255
Assignment Task

 

Question 1
Thresholding
Given the following 6x3 grey level image (with intensities between 0 and 255):
-------------------------------------
| 180 | 180 | 150 | 140 | 140 | 120 |
| 150 | 140 | 120 | 120 | 110 | 110 |
| 140 | 120 | 120 | 110 | 100 | 100 |
-------------------------------------
conduct thresholding. Clearly show the final black and white image. Find the total intensity of the input image. Compare this to the total intensity of your black and white image.

Question 2
Error diffusion
Given the following 6x3 grey level image (with intensities between 0 and 255):
-------------------------------------
| 180 | 180 | 150 | 140 | 140 | 120 |
| 150 | 140 | 120 | 120 | 110 | 110 |
| 140 | 120 | 120 | 110 | 100 | 100 |
-------------------------------------
conduct error diffusion dithering. Clearly show the error passed to each pixel and the final black and white image.
Find the total intensity of the input image. Compare this to the total intensity of your black and white image.

Pattern matrix
The 3 x 3 pattern matrix to be used in both questions is as follows:
-------------------
| 3 | 7 | 5 |
| 6 | 1 | 2 |
| 9 | 4 | 8 |
-------------------
 

Question 3
Pattern dither
Given the following 6x3 grey level image (with intensities between 0 and 255):
-------------------------------------
| 180 | 180 | 150 | 140 | 140 | 120 |
| 150 | 140 | 120 | 120 | 110 | 110 |
| 140 | 120 | 120 | 110 | 100 | 100 |
-------------------------------------
conduct pattern dithering. Clearly show the derivation of the final black and white image.

Question 4
Ordered dither
Given the following 6x3 grey level image (with intensities between 0 and 255):
-------------------------------------
| 180 | 180 | 150 | 140 | 140 | 120 |
| 150 | 140 | 120 | 120 | 110 | 110 |
| 140 | 120 | 120 | 110 | 100 | 100 |
-------------------------------------
conduct ordered dithering. Clearly show the derivation of the final black and white image.

Pattern matrix (4x4)
The 4 x 4 pattern matrix to be used in both questions is as follows:
-------------------------
| 1 | 9 | 3 | 11 |
| 13 | 5 | 15 | 7 |
| 4 | 12 | 2 | 10 |
| 16 | 8 | 14 | 6 |
-------------------------

 

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  • Posted on : May 21st, 2019
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