用等相关峰法或迭代法合成旋转不变综合鉴别函数

Composing the Rotation-invariant Synthesis Discrimination Function by the Equal-peaks or Iteration Methods

用于合成SDF的旋转参考图像间的角度间隔Δθ取1°,得到的相对旋转角度θ-相关峰值曲线非常平坦。仿真实验表明,采用合成的旋转不变综合鉴别函数(SynthesisDiscriminationFunction,SDF)来替代参考图像,可以使VanderLugt相关器或联合变换相关器JTC在(0°～40°)的角度范围内具有良好的旋转不变性。

The SDF was composed by the equal-peaks or iteration methods, and it works better when the reference object's rotate step length Δθ is small, such as 1°, and the curve of θ-correlate peaks is very flat with little fluctuate. The simulation shows that when the reference object is replaced by the synthesis discrimination function (SDF) composed from the reference object, the Vauder lugt correlator(VLC) or joint transform correlator (JTC) will gain the good characteristic of rotation-invariant between 0°-40°.