DDA scan conversion algorithm
Describe in brief regarding the DDA scan conversion algorithm?
Expert
Digital differential analyzer (or DDA) is a scan conversion algorithm mainly based on calculation either Δy or Δx by using the given equations:
Δy = m Δx Δx = Δy/m
Sampling the line at unit intervals in one coordinate and find out corresponding integer values closest to the line path for coordinates.
Sample at X intervals (?x = 1) and calculate each successive Y value as: Yk+1 = Yk + m
For the lines with positive slope more than 1, reverse the roles of X and Y. The sample at unit Y intervals (?y = 1) and compute each successive X value as:
Xk+1 = Xk + 1/m
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