CURRENT ISSUE
Contests
Test your eq
|
|
Issue #218 September 2008
Problem 2—With modern solid-state image sensors, an operation known as “demosaic” is often required. What is this?
Answer 2 —The name “demosaic” refers to the fact that on most color image sensors, the individual color filters are laid out pixel-by-pixel in a mosaic pattern, also known as a Bayer pattern after its inventor:
In order to get a complete set of red, green, and blue values for each pixel, it is necessary to compute the missing values based on the values of neighboring pixels. For example, in order to get a red value for each of the green pixels in the second row, the red values above and below might be averaged. In order to get a blue value, the ones to either side could be averaged.
Back to Issue #218 Questions | Test Your EQ Archive List
|
