基于FPGA的图像调焦系统研究

采用基于图像技术的自动调焦方法,根据图像分析出图形的质量,完成图像预处理、清晰度判别,获得当前的成像状况。通过控制电机,完成调焦操作。其中核心技术是分析图像质量评价函数。针对调焦算法计算量大、计算复杂等问题,采用中值滤波和灰度线性变换的图像预处理方法,流水线作业,“乒乓”操作,双蝶形处理器复用,基-2FFT算法相结合的工作模式。实验结果证实,本方法解决了自动调焦算法复杂系统控制的速度问题。

Study of the Image Auto-Focusing System Based on FPGA

The auto-focusing based on image technology is used to accomplishes image pretreatment,definition evaluation and judges the imaging state from the current image quality.The system can adjust focus distance correctly supervised by imaging state.The key technology is the image quality analysis function.Aiming at the enormous computation and high complexity of the auto-focusing algorithm,the preprocessing method for combining the median filter with the linear transform of gray value,the pipelining structure,th...