Motion Estimation Using the Firefly Algorithm in Ultrasonic Image Sequence of Soft Tissue

Figure 5

The estimated motion vectors by using the IFSA and IFA with different iterations.

(a) An image of ultrasonic extensor tendon

(b) Current ROI (defined in (a))

(c) Reference ROI (next frame of (a))

(d) IFSA with 20 iterations

(e) IFA with 50 iterations

(f) IFA with 100 iterations

(g) IFA with 150 iterations

(h) IFA with 200 iterations

(i) IFA with 300 iterations