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ISRO2014-7

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What does a pixel mask mean?

  1. string containing only $1\text{'s}$
  2. string containing only $0\text{'s}$
  3. string containing two $0\text{'s}$
  4. string containing $1\text{'s}$ and $0\text{’s}$
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This question is related to Digital image Processing not Computer science 

 Pixel mask is formed by digits 1 and 0 to determine the positions to create a plot within the line path. For example, the mask 1111000 is used to show a dashed line with a dash length of 4 and inter point spacing of 3.

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