1. Implementation of Optimized Diamond Search
Algorithm
A Term Project for the course of Advance Digital System Design
By
Muhammad Naeem Tayyab
Supervisor: Dr. Rehan Hafiz
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2. Motion Estimation is one of the
most time consuming part in
video encoding system, it is a
process of determining motion
vectors that describes
transformations from one image
to another.
Block Matching is the way of
locating matching blocks in a
sequence of digital video
Figure 1. Block Matching
frames for the purpose of
Motion Estimation.
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3.  Full Search (FS)
 Binary Search (BS)
 Three Step Search (TSS)
 Four Step Search (FSS)
 Diamond Search (DS)
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4. Step 1: Let say center point is
(x,y) and having eight
neighborhood points. Compute
SAD (Sum of Absolute
Difference) at four points
(x+1,y), (x-1,y),(x,y+1) and (x,y-
1). New point is the one having
minimum SAD value.
Step 2: Keep doing Step 1 until
you found MinSAD at center
point. Figure 2. Example of DS Algorithm
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5. Figure 3. Flow Chart of DS Algorithm
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6. 3 3
SAD =  I ( x  k , y  l )  S (k , l )
k 0 l 0
X – Y, X >Y
|X–Y| = Y – X, Y >X
0, X == Y
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7. (x,y-1)
(x-1,y) (x+1,y)
(x,y)
(x,y+1)
Figure 4. SAD Calculation Points
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11. Questions???
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