光纖傳感系統(tǒng)中光斑中心亞像素定位算法

摘要：為了提高基于電荷耦合元件的光纖傳感系統(tǒng)中光斑光強(qiáng)峰值的定位精度，在傳統(tǒng)灰度重心法的基礎(chǔ)上提出基于非線性權(quán)值和線性插值的峰值定位算法，在不同噪聲情況下比較原重心法與改進(jìn)的重心法的定位精度。實(shí)驗(yàn)結(jié)果表明，改進(jìn)的算法能達(dá)到0.05個(gè)像元大小的定位精度，具有更高的定位精度和穩(wěn)定性。

關(guān)鍵詞：電荷耦合元件；光強(qiáng)峰值定位；濾波；線性插值；非線性權(quán)值

【Abstract】In order to improve orientation accuracy of the light-spot pixel position in fiber sensing measurement system based on Charge-Coupled Device(CCD), this paper proposes a new algorithm based on traditional center of gravity algorithm, which adopts weight nonlinearity and linear interpolation. Orientation precision of the two algorithms are compared under different noise levels. Simulation result shows that the new algorithm can reach 0.05 pixel of orientation precision, and it is more precise and stable.

【Key words】Charge-Coupled Device(CCD); orientation of light intensity peak; filtering; linear interpolation; nonlinear weight?