IQM

The IQM method can evaluate image quality directly .

IQM方法可以对图像直接进行质量评价。

The IQM value can control the adjustive focusing distance definitely in focusing applications . It decreases searching process compared with the image contrast method and has faster response when the demand for precision is not strict .

调焦应用中，根据IQM值可以明确地控制焦距调整量，与对比度方法相比减少了搜索过程，因而在精度要求不是很高的情况下，该方法具有更快的响应能力。

The log ( IQM ) value and the human vision evaluation can satisfy an approximate linear relation . So its evaluation results can represent the human vision evaluation and be used for the references of other applications and the direct focusing control .

log（IQM）值与人的视觉评价值基本上可以满足一种线性关系，因而它的评价结果可以代表人的视觉评价，作为其他应用的参考，也可以很直接地应用到调焦控制。