Development of Automatic 3D Blood Vessel Search and Automatic Blood Sampling System by Using Hybrid Stereo-Autofocus Method

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="258626.fig.006a" src="https://static.hindawi.com/articles/ijo/volume-2012/258626/figures/258626.fig.006a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Residual error of template matching</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="258626.fig.006b" src="https://static.hindawi.com/articles/ijo/volume-2012/258626/figures/258626.fig.006b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Derivative of residual error</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="258626.fig.006c" src="https://static.hindawi.com/articles/ijo/volume-2012/258626/figures/258626.fig.006c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Derivative of residual error around blood vessel 1</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="258626.fig.006d" src="https://static.hindawi.com/articles/ijo/volume-2012/258626/figures/258626.fig.006d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Derivative of residual error around blood vessel 2</td></tr></table></td></tr></table>

<table>Residual errors calculated by template matching algorithm and its derivatives distributions to determine the sharpness.</table>

International Journal of Optics

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Figure 6

Figure 6: Development of Automatic 3D Blood Vessel Search and Automatic Blood Sampling System by Using Hybrid Stereo-Autofocus Method 